WO2020111039A1

WO2020111039A1 - Movement analysis device for fibers in resin, movement analysis method for fibers in resin, program, and storage medium

Info

Publication number: WO2020111039A1
Application number: PCT/JP2019/046094
Authority: WO
Inventors: 克哉坂場; 有司岡田; 彰百濟; 中野　亮
Original assignee: 東レエンジニアリング株式会社
Priority date: 2018-11-29
Filing date: 2019-11-26
Publication date: 2020-06-04
Also published as: JP2020082620A

Abstract

Provided is a movement analysis device for fibers in a resin, the device being capable of, while reducing an increase in calculation amount, analyzing movement of fibers in a resin in which interference between the fibers is taken into consideration. Specifically, in a movement analysis device 100 for fibers 220 in a resin 210, a fiber analysis unit 20 comprises: a resin speed correction unit 25 that corrects a flow speed of the resin 210 at a position corresponding to a joint 221 acquired by a resin speed acquisition unit 22, on the basis of at least one of the density of the fibers 220 at the position corresponding to the joint 221 and the bending degree of the fibers 220; and an analysis unit 26 that analyzes movement of the fibers 220 in the resin 210 on the basis of the flow speed of the rein 210 corrected by the resin speed correction unit 25.

Description

Fiber migration analysis device in resin, fiber migration analysis method in resin, program, and storage medium

The present invention relates to a fiber movement analysis device in a resin, a fiber movement analysis method in a resin, a program, and a storage medium.

Conventionally, an analysis method for analyzing the movement of fibers in a resin is known (for example, see Non-Patent Document 1 and Patent Document 1).

The above Non-Patent Document 1 discloses an analysis method for analyzing the movement of fibers in resin during injection molding. In this analysis method, the flow state of the resin is predicted by the conventional technique. Then, the data of the velocity distribution of the resin for each time is formed. The fibers in the resin are assumed to move freely according to the velocity distribution of the resin for each time described above. As a result, the state of the fibers in the resin (bending, density, etc.) is calculated. In Non-Patent Document 1, the effect of interference between fibers is neglected.

Also, Patent Document 1 above discloses a method for analyzing the motion of particles in a fluid substrate. In this motion analysis method, spheres (aggregates of spheres) that are connected to each other and imitate linear fibers (particles) are used as an analysis model. Then, in the collection of spheres, the degree of freedom of the bond length corresponding to the tensile elasticity between adjacent spheres and the degree of freedom of the bond angle corresponding to the bending elasticity of the collection of spheres are set. Then, the translation and rotation of each sphere are calculated. As a result, the movement, deformation, orientation, etc. of the aggregate (particles) of spheres are analyzed. Further, in Patent Document 1 described above, when it is necessary to consider the interaction of particles (linear fibers), a step of directly calculating the repulsive force due to contact between particles is required when calculating the translation and rotation of each sphere. included. Thereby, the movement, deformation, orientation, etc. of the particles are analyzed while considering the interaction of the particles.

Japanese Patent Laid-Open No. 5-314091

However, the method for analyzing the motion of particles in a fluidized substrate described in Patent Document 1 above includes a step of directly calculating the repulsive force due to contact between particles in order to consider the interaction of particles. Therefore, there is a problem in that the amount of calculation for analyzing the motion of particles in a fluidized substrate increases.

The present invention has been made to solve the above problems, and one object of the present invention is to provide a resin in a resin in which interference between fibers is considered while suppressing an increase in calculation amount. It is intended to provide a fiber movement analysis device in a resin, a fiber movement analysis method, a program, and a storage medium capable of analyzing movement of fibers.

In order to achieve the above object, a device for analyzing a movement of fibers in a resin according to a first aspect of the present invention includes a resin velocity analysis unit for analyzing at least a flow velocity of a resin flowing in a region, and a resin velocity analysis unit. Based on the analyzed flow rate of the resin, and comprising a fiber analysis unit for analyzing the flow of the fiber flowing with the resin, the fiber analysis unit, the fiber, a plurality of nodes, and a rod element connected by the nodes and The fiber modeling part to be modeled by, the resin velocity acquisition part that acquires the resin flow velocity analyzed by the resin velocity analysis part at the position corresponding to the node, and the fiber density and the fiber density at the position corresponding to the node Based on at least one of the degree of bending, the resin velocity correction unit that corrects the resin flow velocity at the position corresponding to the node acquired by the resin velocity acquisition unit, and the resin velocity correction unit that corrects the resin velocity corrected by the resin velocity correction unit And an analysis unit that analyzes the movement of fibers in the resin based on the flow velocity.

In the fiber movement analysis device in the resin according to the first aspect, as described above, the fiber analysis unit is based on at least one of the density of the fiber and the degree of bending of the fiber at the position corresponding to the node. , The resin velocity correction unit that corrects the resin flow velocity at the position corresponding to the node acquired by the resin velocity acquisition unit, and the movement of the fiber in the resin based on the resin flow velocity corrected by the resin velocity correction unit And an analysis unit for analyzing. As a result, the influence of the interference between fibers is indirectly (pseudo) included in the resin flow velocity based on at least one of the density of fibers and the degree of bending of fibers, which is a relatively small amount of calculation. You can As a result, compared to the case of directly calculating the interference between fibers (such as the repulsive force due to contact), the movement of the fibers in the resin that considers the interference between the fibers is suppressed while suppressing an increase in the calculation amount. Can be analyzed. Moreover, since the increase in the amount of calculation is suppressed, the analysis of the movement of the fiber in the resin can be performed at high speed.

In the fiber movement analysis device in the resin according to the first aspect, preferably, the resin velocity correction unit corrects the resin flow velocity so that the resin flow velocity changes as the fiber density at the position corresponding to the node changes, The flow velocity of the resin is corrected so as to change as the degree of bending of the fiber at the position corresponding to the node changes. According to this structure, it is possible to appropriately analyze the movement of the fiber in the resin according to the change in the density of the fiber and the change in the degree of bending of the fiber.

In this case, preferably, the resin velocity correction unit corrects the resin flow velocity so as to decrease as the fiber density at the position corresponding to the node increases, and the degree of bending of the fiber at the position corresponding to the node increases. The flow velocity of the resin is corrected so as to become smaller as it goes. With this configuration, indirectly considering that the interference between the fibers is increased due to the increase in the density of the fibers, and the interference between the fibers is increased due to the degree of the bending of the fibers is increased. Thus, the movement of fibers in the resin can be analyzed.

In the fiber movement analysis device in the resin according to the first aspect, preferably, the fiber analysis unit calculates the density of the fibers based on the volume of the fibers in the region corresponding to the node analyzed by the analysis unit. The calculation unit is further included. According to this structure, the fiber density can be easily calculated only by calculating the volume of the fiber in the region corresponding to the node.

In the fiber movement analysis device in resin according to the first aspect, preferably, the fiber analysis unit calculates the degree of bending of the fiber based on the position information of the node of the fiber analyzed by the analysis unit. The calculation unit is further included. According to this structure, the degree of bending of the fiber can be easily calculated.

In the fiber movement analysis device in the resin according to the first aspect, preferably, the resin velocity correction unit is provided at least at a node acquired by the resin velocity acquisition unit near a point where a plurality of resins meet in the region. It is configured to correct the flow velocity of the resin at the corresponding position. According to this structure, the flow velocity of the resin is corrected in the vicinity of the point where the plurality of resins, where the fibers relatively easily interfere with each other, join together, so that the interference between the fibers can be effectively considered.

In the fiber movement analysis device in the resin according to the first aspect, preferably, the resin velocity analysis unit determines the density of the fiber and the bending of the fiber at the position corresponding to the node at one point in the analysis of the flow of the fiber. The viscosity of the resin is corrected based on at least one of the degree and the flow velocity of the resin at one time point and the next time point is analyzed based on the corrected viscosity. According to this structure, since the influence of the fiber is taken into consideration in the analysis of the resin flow velocity, the accuracy of the resin flow velocity analysis can be improved.

A device for analyzing the movement of fibers in a resin according to a second aspect of the present invention is a resin flow analysis unit that analyzes a flow state of a resin flowing in a region at a certain time point, and a resin calculated by the resin flow analysis unit. And a fiber analysis unit that analyzes the flow of a fiber flowing together with the resin based on the flow velocity of the fiber. The fiber analysis unit models the fiber by a plurality of nodes and rod elements connected by the nodes. Includes a fiber modeling unit and a resin velocity acquisition unit that acquires the resin flow velocity analyzed by the resin flow analysis unit at the position corresponding to the node, and calculates the movement of the fiber based on the resin flow velocity. , Calculates the density of the fiber and the degree of bending of the fiber at the position corresponding to the node, and corrects the viscosity of the resin at the next time based on at least one of the density of the fiber and the degree of bending of the fiber A resin viscosity correction unit is further provided, and the resin flow analysis unit calculates the flow of the resin and the fiber at the next time point based on the viscosity of the resin corrected by the resin viscosity correction unit.

In the fiber movement analysis device in resin according to the second aspect, as described above, the movement of the fiber is calculated based on the flow velocity of the resin, and the density and bending of the fiber at the position corresponding to the node are calculated. A resin viscosity correction unit that calculates the degree and corrects the viscosity of the resin at the next point in time based on at least one of the density of the fiber and the degree of bending of the fiber, and the resin flow analysis unit is configured to correct the resin viscosity. Calculate the resin and fiber flow at the next time point based on the resin viscosity corrected in parts. As a result, the influence of the interference between fibers is indirectly (pseudo) included in the resin flow velocity based on at least one of the density of fibers and the degree of bending of fibers, which is a relatively small amount of calculation. You can As a result, compared to the case of directly calculating the interference between fibers (such as the repulsive force due to contact), the movement of the fibers in the resin that considers the interference between the fibers is suppressed while suppressing an increase in the calculation amount. Can be analyzed. Moreover, since the increase in the amount of calculation is suppressed, the analysis of the movement of the fiber in the resin can be performed at high speed.

A method of analyzing movement of fibers in a resin according to a third aspect of the present invention includes a step of analyzing at least a flow velocity of a resin flowing in a region, a fiber flowing together with the resin is connected to a plurality of nodes, and the nodes are connected to each other. Of the step of modeling with the rod element that was modeled, the step of acquiring the analyzed resin flow velocity at the position corresponding to the node, and the density of the fiber and the degree of bending of the fiber at the position corresponding to the node. Based on at least one of the above, a step of correcting the flow velocity of the resin at the position corresponding to the obtained node, and a step of analyzing the movement of the fiber in the resin based on the corrected flow velocity of the resin ..

In the method for analyzing the movement of fibers in the resin according to the third aspect, as described above, the acquired nodes are based on at least one of the density of the fibers and the degree of bending of the fibers at the position corresponding to the node. And a step of analyzing the movement of the fiber in the resin based on the corrected resin flow velocity. As a result, the influence of the interference between fibers is indirectly (pseudo) included in the resin flow velocity based on at least one of the density of fibers and the degree of bending of fibers, which is a relatively small amount of calculation. You can As a result, compared to the case of directly calculating the interference between fibers (such as the repulsive force due to contact), the movement of the fibers in the resin that considers the interference between the fibers is suppressed while suppressing an increase in the calculation amount. It is possible to provide a movement analysis method capable of analyzing

A program according to a fourth aspect of the present invention is a model in which at least a flow velocity of a resin flowing in a region is analyzed, and a fiber flowing with the resin is modeled by a plurality of nodes and a rod element connected by the nodes. The step of liquefying, at the position corresponding to the node, the step of acquiring the flow velocity of the resin analyzed, based on at least one of the density of the fiber and the degree of bending of the fiber at the position corresponding to the node, The method includes a step of correcting the resin flow velocity at the position corresponding to the acquired node, and a step of analyzing the movement of fibers in the resin based on the corrected resin flow velocity.

In the program according to the fourth aspect, as described above, based on at least one of the density of the fiber at the position corresponding to the node and the degree of bending of the fiber, the resin at the position corresponding to the acquired node is The method includes a step of correcting the flow velocity and a step of analyzing the movement of fibers in the resin based on the corrected flow velocity of the resin. As a result, the influence of the interference between fibers is indirectly (pseudo) included in the resin flow velocity based on at least one of the density of fibers and the degree of bending of fibers, which is a relatively small amount of calculation. You can As a result, compared to the case of directly calculating the interference between fibers (such as the repulsive force due to contact), the movement of the fibers in the resin that considers the interference between the fibers is suppressed while suppressing an increase in the calculation amount. It is possible to provide a program capable of analyzing.

A storage medium according to a fifth aspect of the present invention includes a step of analyzing at least a flow velocity of a resin flowing in a region, a fiber flowing with the resin, a plurality of nodes, and a rod element connected by the nodes. Based on at least one of the step of modeling, the step of obtaining the analyzed resin flow velocity at the position corresponding to the node, and the density of the fiber and the degree of bending of the fiber at the position corresponding to the node. A program is stored, which includes a step of correcting a resin flow velocity at a position corresponding to the acquired node, and a step of analyzing movement of fibers in the resin based on the corrected resin flow velocity.

In the storage medium according to the fifth aspect, as described above, the resin at the position corresponding to the acquired node is based on at least one of the density of the fiber at the position corresponding to the node and the degree of bending of the fiber. And storing a program that includes a step of correcting the flow velocity of the resin and a step of analyzing the movement of the fiber in the resin based on the corrected flow velocity of the resin. As a result, the influence of the interference between fibers is indirectly (pseudo) included in the resin flow velocity based on at least one of the density of fibers and the degree of bending of fibers, which is a relatively small amount of calculation. You can As a result, compared to the case of directly calculating the interference between fibers (such as the repulsive force due to contact), the movement of the fibers in the resin that considers the interference between the fibers is suppressed while suppressing an increase in the calculation amount. It is possible to provide a storage medium capable of analyzing.

According to the present invention, as described above, it is possible to analyze the movement of fibers in a resin in which the interference between fibers is taken into consideration while suppressing an increase in the amount of calculation.

It is a figure which shows the structure of the movement analysis apparatus of the fiber in resin by 1st Embodiment. It is a figure which shows the area|region where resin flows, and a fiber. It is a figure which shows the flow velocity (flow velocity vector) before correction. It is a figure which shows the flow velocity after correction (flow velocity vector). FIG. 5 shows a modeled fiber. (A) shows a linear fiber, (b) and (c) have shown the state of the fiber which bends with movement. It is a figure which shows the reduction amount of the flow rate of resin with respect to the density of fiber. It is a figure which shows the fall amount of the flow rate of resin with respect to the degree of bending of a fiber. It is a figure which shows the area|region of the vicinity of the point where resin (fiber) merges. It is a figure for demonstrating movement of a fiber. It is a flow diagram for explaining the operation of the resin velocity analysis unit according to the first embodiment. It is a flow figure for explaining operation of a fiber analysis part by a 1st embodiment. It is a schematic diagram which shows the movement of the fiber analyzed by simulation (when the flow velocity of resin is not corrected). It is a schematic diagram which shows the movement of the fiber analyzed by simulation (when the flow velocity of resin is corrected). It is a figure which shows the structure of the movement analysis apparatus of the fiber in resin by 2nd Embodiment. It is a flowchart for demonstrating operation|movement of the movement analysis apparatus by 2nd Embodiment.

An embodiment of the present invention will be described below with reference to the drawings.

[First Embodiment]
(Configuration of analyzer)
The configuration of the movement analysis device 100 according to the first embodiment will be described with reference to FIGS. 1 to 13.

As shown in FIG. 1, the movement analysis device 100 includes a resin velocity analysis unit 10. The resin velocity analysis unit 10 is configured to analyze at least the flow velocity of the resin 210 (see FIG. 3) flowing in a certain region 200 (a mold or the like, see FIG. 2). For example, the resin velocity analysis unit 10 forms a three-dimensional model in which the region 200 (cavity) in which the resin 210 flows is divided into a plurality of minute elements. Next, the flow conductance of the resin in the minute element (resin flow characteristics such as viscosity) is determined. Then, the finite element method or the like is used to calculate the resin pressure, the pressure change, the flow velocity, etc. of the resin in the minute element based on the determined flow conductance. As a result, the flow velocity (flow velocity vector, see “V” in FIG. 3) at a certain time (i step, i is a natural number) in the region 200 is calculated. The resin velocity analysis unit 10 calculates the flow of the resin 210 on the assumption that the density of the fibers 220 contained in the resin 210 and the viscosity of the resin 210 are uniform. Further, the resin velocity analysis unit 10 calculates the flow velocity (flow velocity vector) for N steps (from the start to the end of the flow of the resin 210, N is a natural number).

For example, as shown in FIG. 2, the region 200 includes a substantially rectangular parallelepiped region portion 201 extending in the horizontal direction (X direction), and a region portion 202 and a region portion 203 extending vertically downward from the region portion 201. The width W1 of the area portion 202 in the X direction is larger than the width W2 of the area portion 203 in the X direction. The width W3 of the area portion 202 in the Y direction and the width W3 of the area portion 203 in the Y direction are equal to each other. In addition, the resin 210 (and the fibers 220 included in the resin 210) move from the X1 direction side and the X2 direction side of the region portion 201 so as to approach each other. The shape of the region 200 is not limited to the shape shown in FIG.

Further, as shown in FIG. 1, the movement analysis device 100 includes a fiber analysis unit 20. The fiber analysis unit 20 is configured to analyze the flow of the fiber 220 flowing together with the resin 210 based on the flow velocity of the resin 210 analyzed by the resin velocity analysis unit 10. Hereinafter, a specific configuration of the fiber analysis unit 20 will be described.

The fiber analysis unit 20 includes a fiber modeling unit 21. As shown in FIG. 5A, the fiber modeling unit 21 is configured to model the fiber 220 with a plurality of nodes 221 and a rod element 222 connected by the nodes 221. It is also assumed that the bending and rotation between the rod elements 222 are free. Further, the rod element 222 is assumed to be a rigid body. 5(b) and 5(c) show the state of the fiber 220 that bends as it moves.

Further, as shown in FIG. 1, the movement analysis device 100 includes a resin speed acquisition unit 22. The resin velocity acquisition unit 22 is configured to acquire the flow velocity of the resin 210 analyzed by the resin velocity analysis unit 10 at the position corresponding to the node 221. Specifically, the resin velocity acquisition unit 22 acquires the flow velocity vector (the flow velocity and direction of the resin 210, see FIG. 3) in the region 200 analyzed by the resin velocity analysis unit 10. Then, the flow velocity vector at the position corresponding to the node 221 in the region 200 is used as the flow velocity vector for calculating the movement of this node 221.

Further, as shown in FIG. 1, the movement analysis device 100 includes a density calculation unit 23. The density calculation unit 23 is configured to calculate the density of the fibers 220 based on the volume of the fibers 220 in the region (small element of the divided region 200) corresponding to the node 221 analyzed by the analysis unit 26 described later. Has been done. That is, the density of the fibers 220 in the microelements is calculated by dividing the volume of the fibers 220 by the volume of the microelements.

The movement analysis device 100 also includes a bending degree calculation unit 24. The bending degree calculation unit 24 is configured to calculate the bending degree of the fiber 220 based on the position information of the node 221 of the fiber 220 analyzed by the analysis unit 26. Then, the flow velocity is corrected as described later according to the degree of bending (see FIGS. 5A to 5C).

Here, in the first embodiment, the movement analysis device 100 includes a resin speed correction unit 25. The resin speed correction unit 25 determines the position corresponding to the node 221 acquired by the resin speed acquisition unit 22 based on at least one of the density of the fibers 220 and the degree of bending of the fibers 220 at the position corresponding to the node 221. Is configured to correct the flow velocity of the resin 210 at. Specifically, the resin speed correction unit 25 corrects so that the flow speed of the resin 210 changes as the density of the fibers 220 at the position corresponding to the node 221 changes. Specifically, the resin velocity correction unit 25 corrects the flow velocity of the resin 210 to decrease as the density of the fibers 220 at the position corresponding to the node 221 increases. For example, as shown in FIG. 6, as the density increases, the amount of decrease in the flow velocity gradually increases. When the density is relatively high, the rate of change in the amount of decrease in the flow velocity is small. That is, as the density increases, the flow velocity decrease amount becomes saturated. Further, the decrease amount of the flow rate is measured in advance by an experiment of the flow of the resin 210 in a state where the resin 210 actually contains the fibers 220.

Further, the movement analysis device 100 is configured to perform correction so that the flow velocity of the resin 210 changes as the degree of bending of the fiber 220 at the position corresponding to the node 221 changes. Specifically, the resin speed correction unit 25 corrects the flow speed of the resin 210 to decrease as the degree of bending of the fiber 220 at the position corresponding to the node 221 increases. For example, as shown in FIG. 7, the amount of decrease in the flow velocity gradually increases as the degree of bending increases. When the degree of bending is relatively large, the rate of change in the amount of decrease in the flow velocity is small. That is, as the degree of bending increases, the decrease amount of the flow velocity becomes saturated. Further, the decrease amount of the flow velocity is measured in advance by an experiment of the flow of the resin 210 in a state where the fiber 210 is actually included in the resin 210, as in the correction of the flow velocity with respect to the density of the fibers 220. ..

Here, correction of the flow velocity of the resin 210 will be described with reference to FIGS. 3 and 4. In FIG. 3 and FIG. 4, “arrows” represent flow velocity vectors. 3 and 4, an outer frame (rectangular frame) represents a region 200 in which the resin 210 flows. Further, FIG. 3 shows the flow velocity before correction, and FIG. 4 shows the flow velocity after correction.

As shown in FIG. 3, the flow velocity before correction is assumed to be uniform. Then, it is assumed that the density of the fibers 220 calculated in the i-1th (previous) step is relatively large in the area A1 and the degree of bending of the fibers 220 is relatively large in the area A2. As a result, as shown in FIG. 4, in the regions A1 and A2, the flow velocity is corrected to be small. The degree of decrease in the flow velocity is calculated based on the graphs of FIG. 6 (density) and FIG. 7 (degree of bending) described above.

In addition, as shown in FIG. 8, the resin speed correction unit 25 includes a resin at a position corresponding to the node 221 acquired by the resin speed acquisition unit 22 at least in the vicinity of a point where a plurality of resins 210 merge in the area 200. It is configured to correct the flow rate of 210. The vicinity of the point where the resin 210 merges refers to the vicinity of the area portion 202 and the area portion 203 where the resin 210 moving from the X1 direction side and the resin 210 moving from the X2 direction side merge. Further, in the vicinity of the point where the plurality of resins 210 (fibers 220) merge, the density of the fibers 220 increases, so that the flow velocity of the resin 210 is corrected to decrease. Further, in the vicinity of the point where the plurality of resins 210 (fibers 220) merge, the fibers 220 moving from the X1 direction side and the fibers 220 moving from the X2 direction side collide (tighten each other), and the area portion 202 and Inflow into the area portion 203 is suppressed. Such an effect of collision (stretching) of the fibers 220 can be included in the correction of the flow velocity as a factor of the decrease in the flow velocity of the resin 210. In the first embodiment, the flow velocity of the resin 210 is corrected at all positions within the area 200.

Further, as shown in FIG. 1, the fiber analysis unit 20 includes an analysis unit 26 that analyzes the movement of the fibers 220 in the resin 210. As shown in FIG. 9, the analysis unit 26 is configured to analyze the movement of the fibers 220 in the resin 210 based on the flow velocity (flow velocity vector V) of the resin 210 corrected by the resin velocity correction unit 25. ing. Specifically, the analysis unit 26 calculates the movement of the node 221 according to the flow velocity at the position corresponding to the node 221 acquired by the resin speed acquisition unit 22. The movement (movement amount, movement direction) of a plurality of nodes 221 of one fiber 220 is calculated. In FIG. 9, “black circles” are the nodes 221 before the movement, and “white circles” are the nodes 221 after the movement. It is assumed that the rod element 222 is a rigid body and has a constant length. Therefore, when the length of the rod element 222 between the nodes 221 changes due to the movement of the plurality of nodes 221, the nodes 221 are kept so that the length of the rod element 222 is kept constant. The position of is corrected. In FIG. 9, the “dotted circle” is the node 221 whose position has been corrected.

The analysis of the movement of the fiber 220 by the analysis unit 26 is performed from the start to the end of the flow of the resin 210 (for N steps). Note that the calculation of the density of the fibers 220 by the density calculation unit 23, the calculation of the degree of bending of the fibers 220 by the bending degree calculation unit 24, and the correction of the flow velocity of the resin 210 by the resin velocity correction unit 25 are performed in each step. It is done every time.

As shown in FIG. 1, the resin velocity analysis unit 10 and the fiber analysis unit 20 (fiber modeling unit 21, resin velocity acquisition unit 22, density calculation unit 23, bending degree calculation unit 24, resin velocity correction unit 25). , And the analysis unit 26) are configured by a program 40 (software) stored in a storage medium 30 inside the movement analysis device 100.

Next, referring to FIG. 10, the analysis of the flow rate of the resin 210 will be described. The resin velocity analysis unit 10 analyzes the flow velocity of the resin 210.

In step S1, the resin velocity analysis unit 10 forms a three-dimensional model in which the region 200 (cavity) in which the resin 210 flows is divided into a plurality of minute elements. For example, the three-dimensional CAD data of the area 200 created in advance is read from a storage device (not shown). Then, the area 200 is divided into a plurality of minute elements (mesh) based on the read three-dimensional CAD data of the area 200.

Then, in step S2, the flow velocity vector (flow velocity) (see FIG. 3) at a certain time (i step) in the region 200 is calculated using the finite element method or the like.

Next, in step S3, it is determined whether or not the calculation of the flow velocity vector for N steps is completed. In step S3, in the case of “Yes”, the calculation of the flow velocity vector ends. In the case of “No” in step S3, the process returns to step S2 and the calculation of the flow velocity vector is continued.

Next, referring to FIG. 11, a method of analyzing the movement of the fiber 220 in the resin 210 will be described.

First, in step S11, the fiber 220 flowing together with the resin 210 is modeled by a plurality of nodes 221 and a rod element 222 connected by the nodes 221.

Next, in step S12, the analyzed flow velocity of the resin 210 (see FIG. 3) at the position corresponding to the node 221 calculated by the resin velocity analysis unit 10 is acquired.

Next, in step S13, the acquired node 221 is selected based on at least one (both in the first embodiment) of the density of the fiber 220 and the degree of bending of the fiber 220 at the position corresponding to the node 221. The flow velocity of the resin 210 at the corresponding position is corrected (see FIG. 4). If the current step is the i-th step, the flow velocity of the resin 210 is corrected based on the density of the fibers 220 and the degree of bending of the fibers 220 calculated in the (i-1)th (previous) step. .. Also, when the step is 1 (i=1), for example, the density is assumed to be uniform.

Next, in step S14, the movement of the fibers 220 in the resin 210 is analyzed based on the corrected flow velocity of the resin 210 (see FIG. 9).

Next, in step S15, the degree of bending of the fiber 220 is calculated based on the analyzed position information of the node 221 after the movement, and the fiber 220 of the fiber 220 is calculated based on the volume of the fiber 220 at the position after the movement. The density is calculated.

Next, in step S16, it is determined whether or not the flow of the resin 210 is completed (whether or not the analysis for N steps is completed). In step S16, in the case of “Yes”, the analysis of the movement of the fiber 220 ends. If “No” in step S16, the process returns to step S12, and the analysis of the movement of the fiber 220 is continued.

Next, the simulation of the analysis of the movement of the fiber 220 will be described with reference to FIGS. 12 and 13. FIG. 12 shows the results when the flow velocity is not corrected (comparative example). Further, FIG. 13 shows the results when the flow velocity is corrected based on the density of the fibers 220 and the degree of bending of the fibers 220 (corresponding to the first embodiment).

As shown in FIG. 12, when the flow velocity is not corrected (comparative example), an area portion 202 (rib portion) having a width W1 in the X direction and an area portion having a width W2 (<W1) in the X direction. It was confirmed that the fibers 220 flow into the portion 203 (rib portion) in a substantially equal manner. That is, although the width W2 of the region portion 203 is smaller than the width W1 of the region portion 202, it was confirmed that the fibers 220 flow into the region portion 203 and the region portion 202 substantially equally.

On the other hand, as shown in FIG. 13, when the flow velocity is corrected (corresponding to the first embodiment), the width W2 in the X direction (<W1) narrower than the area portion 202 having the width W1 in the X direction. It was confirmed that the inflow of the fibers 220 was delayed in the region portion 203 having the. That is, since the density of the fibers 220 is higher in the region portion 203 having the smaller width W2, the flow velocity becomes slower. Therefore, the inflow of the fiber 220 is delayed. It was confirmed that the state close to the actual inflow of the fiber 220 was reproduced by correcting the flow velocity.

(Effects of the first embodiment)
Next, the effect of the first embodiment will be described.

In the first embodiment, as described above, the fiber analysis unit 20 determines the resin speed acquisition unit 22 based on at least one of the density of the fibers 220 and the degree of bending of the fibers 220 at the position corresponding to the node 221. The resin speed correction unit 25 that corrects the flow speed of the resin 210 at the position corresponding to the node 221 that has been acquired in the above, and the fibers 220 in the resin 210 based on the flow speed of the resin 210 that is corrected by the resin speed correction unit 25. And an analysis unit 26 that analyzes the movement of the. As a result, the influence of interference between the fibers 220 is indirectly (pseudo) flowed by the resin 210 based on at least one of the density of the fibers 220 and the degree of bending of the fibers 220, which is a relatively small amount of calculation. Can be included in speed. As a result, in the resin 210 in which the interference between the fibers 220 is taken into consideration while suppressing an increase in the calculation amount as compared with the case where the interference between the fibers 220 (such as a repulsive force due to contact) is directly calculated. The movement of the fibers 220 can be analyzed. Moreover, since the increase in the amount of calculation is suppressed, the analysis of the movement of the fiber 220 in the resin 210 can be performed at high speed.

Further, in the first embodiment, as described above, the resin speed correction unit 25 corrects so that the flow speed of the resin 210 changes as the density of the fibers 220 at the position corresponding to the node 221 changes. The flow velocity of the resin 210 is corrected so as to change as the degree of bending of the fiber 220 at the position corresponding to changes. Accordingly, the movement of the fibers 220 in the resin 210 can be appropriately analyzed according to the change in the density of the fibers 220 and the change in the degree of bending of the fibers 220.

Further, in the first embodiment, as described above, the resin speed correction unit 25 corrects the flow speed of the resin 210 to decrease as the density of the fibers 220 in the position corresponding to the node 221 increases, and thus the node 221. The flow velocity of the resin 210 is corrected so as to decrease as the degree of bending of the fiber 220 at the position corresponding to is increased. This indirectly considers that the density of the fibers 220 increases and the interference between the fibers 220 increases, and that the degree of bending of the fibers 220 increases and the interference between the fibers 220 increases. Thus, the movement of the fiber 220 in the resin 210 can be analyzed.

Further, in the first embodiment, as described above, the fiber analysis unit 20 calculates the density of the fibers 220 based on the volume of the fibers 220 in the region corresponding to the node 221 analyzed by the analysis unit 26. The calculation unit 24 is included. This makes it possible to easily calculate the density of the fibers 220 simply by calculating the volume of the fibers 220 in the region corresponding to the node 221.

In addition, in the first embodiment, as described above, the fiber analysis unit 20 calculates the degree of bending of the fiber 220 based on the position information of the node 221 of the fiber 220 analyzed by the analysis unit 26. Including part 24. Accordingly, the degree of bending of the fiber 220 can be easily calculated.

Further, in the first embodiment, as described above, the resin speed correction unit 25 corresponds to the node 221 acquired by the resin speed acquisition unit 22 at least in the vicinity of the point where the plurality of resins 210 merge in the region. It is configured to correct the flow velocity of the resin 210 at the position. According to this structure, since the flow velocity of the resin 210 is corrected in the vicinity of the point where the plurality of resins 210 where the fibers 220 are likely to interfere with each other is merged, the interference between the fibers 220 can be effectively considered. it can.

[Second Embodiment]
The configuration of the movement analysis device 300 according to the second embodiment will be described with reference to FIGS. 14 and 15. In the movement analysis device 300, unlike the first embodiment in which the influence of the fiber 220 is not considered in the calculation of the flow velocity (flow velocity vector) of the resin 210, the influence of the fiber 220 in the calculation of the flow velocity (flow velocity vector) of the resin 210 is affected. Is being considered.

In the second embodiment, as shown in FIG. 14, the resin viscosity correction unit 27 detects the fiber 220 at a position corresponding to the node 221 at one point (i−1 step) in the analysis of the flow of the fiber 220. The viscosity of the resin 210 is corrected based on at least one of the density and the degree of bending of the fiber 220 (both in the second embodiment). The resin viscosity correction unit 27 is included in the fiber analysis unit 20.

Specifically, as shown in FIG. 15, the region 200 is modeled in step S1 as in the first embodiment. Further, in step S11, the fiber 220 is modeled. Next, in step S31, the pressure of the resin in the minute element, the pressure change, the flow velocity, etc. are calculated based on the flow conductance of the resin in the minute element (the resin flow characteristic such as viscosity). As a result, the flow velocity (flow velocity vector) of the i-th step is calculated. The viscosity, which is the flow conductance, is corrected based on both the density of the fibers 220 and the degree of bending of the fibers 220 calculated in the previous (i-1)th step. Further, the resin flow velocity is calculated by the resin velocity calculation unit 320 included in the resin flow analysis unit 310. That is, the flow rate of the resin is sequentially calculated for each step in consideration of both the density of the fibers 220 and the degree of bending of the fibers 220, and the viscosity.

Next, as in the first embodiment, the calculations in steps S12 to S15 are performed.

Next, in step S32, the viscosity, which is the flow conductance, is corrected based on both the density of the fibers 220 and the degree of bending of the fibers 220 calculated in the current (i-th) step. Thus, in the next (i+1)th step, the flow velocity and the like are calculated based on the corrected viscosity.

Next, in step S33, it is determined whether or not the calculated flow velocity has converged. If Yes in step S33, the process proceeds to step S16. If No in step S33, the process returns to step S31.

Next, in step S16, it is determined whether or not the flow of the resin 210 is completed (whether or not the analysis for N steps is completed).

(Effects of Second Embodiment)
Next, the effect of the second embodiment will be described.

In the second embodiment, as described above, the resin viscosity correction unit 27 determines the density of the fibers 220 and the degree of bending of the fibers 220 at the position corresponding to the node 221 at one point in the analysis of the flow of the fibers 220. Based on this, the viscosity of the resin 210 is corrected. As a result, the influence of the fibers 220 is taken into consideration in the analysis of the flow velocity of the resin 210, so that the accuracy of the analysis of the flow velocity of the resin 210 can be improved.

[Modification]
The embodiments and examples disclosed this time are to be considered as illustrative in all points and not restrictive. The scope of the present invention is shown not by the above description of the embodiments and examples but by the scope of claims for patent, and further includes meanings equivalent to the scope of claims for patent and all modifications (modifications) within the scope.

For example, in the above-mentioned first and second embodiments, an example in which the flow velocity of the resin is corrected to decrease as the fiber density increases has been shown, but the present invention is not limited to this. For example, the flow rate of the resin may be corrected to increase as the fiber density increases.

Further, in the first and second embodiments, the example in which the flow rate of the resin is corrected to decrease as the degree of bending of the fiber increases is shown, but the present invention is not limited to this. For example, the flow rate of the resin may be corrected to increase as the degree of bending of the fiber increases.

In the first and second embodiments, the resin flow velocity is corrected based on both the fiber density and the fiber bending degree, but the present invention is not limited to this. For example, the resin flow rate may be corrected based on only one of the density of the fiber and the degree of bending of the fiber.

In the first and second embodiments described above, the example in which the fiber density is calculated based on the volume of the fiber in the region (microelement) corresponding to the node is shown, but the present invention is not limited to this. For example, the fiber density may be calculated based on the number of nodes (the number of rod elements) existing in the minute element.

In the first and second embodiments, an example in which the amount of decrease in the flow velocity with respect to the density (degree of bending) is measured by an experiment has been shown, but the present invention is not limited to this. For example, a simulation in which interference between fibers is directly taken into consideration is performed in advance, and graphs as shown in FIGS. 6 and 7 are created from the results of the simulation. Then, the amount of decrease in the flow velocity with respect to the density (degree of bending) may be calculated based on the created graph.

Further, in the above-mentioned first and second embodiments, an example in which the flow velocity of the resin is corrected at all positions in the area has been shown, but the present invention is not limited to this. In the present invention, the resin flow velocity may be corrected only in the vicinity of the point where a plurality of resins merge in the region. This makes it possible to reduce the load on the movement analysis device.

Further, in the second embodiment described above, an example in which the viscosity of the resin is corrected based on both the density of the fiber and the degree of bending of the fiber has been shown, but the present invention is not limited to this. For example, the viscosity of the resin may be corrected based on only one of the density of the fiber and the degree of bending of the fiber. ‥

Further, in the second embodiment, an example in which it is determined whether or not the calculated flow velocity of the resin has converged has been shown, but the present invention is not limited to this. In the present invention, it may be configured not to determine whether or not the calculated flow velocity of the resin has converged.

In the second embodiment, the resin viscosity correction unit is included in the fiber analysis unit, but the present invention is not limited to this. In the present invention, the resin viscosity correction unit may be included in the resin flow analysis unit.

10 resin velocity analysis unit 20 fiber analysis unit 21 fiber modeling unit 22 resin velocity acquisition unit 23 density calculation unit 24 bending degree calculation unit 25 resin velocity correction unit 26 analysis unit 27 resin viscosity correction unit 30 storage medium 40

program

100, 300 movement Analysis device 200 Area 210 Resin 220 Fiber 221 Node 222 Rod element 310 Resin flow analysis unit

Claims

A resin velocity analysis unit that analyzes at least the flow velocity of the resin flowing in the region,
Based on the flow velocity of the resin analyzed by the resin velocity analysis unit, a fiber analysis unit for analyzing the flow of fibers flowing with the resin,
The fiber analysis unit,
The fiber, a plurality of nodes, a fiber modeling unit for modeling by a rod element connected by the nodes,
At a position corresponding to the node, a resin velocity acquisition unit that acquires the flow velocity of the resin analyzed by the resin velocity analysis unit,
Based on at least one of the density of the fibers at the position corresponding to the node and the degree of bending of the fiber, the flow velocity of the resin at the position corresponding to the node acquired by the resin velocity acquisition unit, A resin speed correction unit for correction,
A movement analysis device for fibers in resin, comprising: an analysis unit that analyzes movement of the fibers in the resin based on the flow velocity of the resin corrected by the resin velocity correction unit.
The resin velocity correction unit corrects the flow velocity of the resin so as to change as the density of the fiber at the position corresponding to the node changes, and the degree of bending of the fiber at the position corresponding to the node changes. The fiber movement analysis device in the resin according to claim 1, wherein the flow velocity of the resin is corrected so as to change as the temperature changes.
The resin velocity correction unit corrects the flow velocity of the resin to decrease as the density of the fibers at the position corresponding to the node increases, and the degree of bending of the fiber at the position corresponding to the node increases. The fiber movement analysis device in a resin according to claim 2, which is configured to correct the flow velocity of the resin so as to be smaller.
4. The fiber analysis unit according to claim 1, further comprising a density calculation unit that calculates a density of the fiber based on a volume of the fiber in a region corresponding to the node analyzed by the analysis unit. 2. A device for analyzing the movement of fibers in a resin according to item 1.
5. The fiber analysis unit further includes a bending degree calculation unit that calculates a degree of bending of the fiber based on position information of the nodes of the fiber analyzed by the analysis unit. 2. A device for analyzing the movement of fibers in a resin according to item 1.
The resin velocity correction unit, at least in the vicinity of a point where the plurality of resins merge in the region, corrects the resin flow velocity at a position corresponding to the node acquired by the resin velocity acquisition unit. 6. A fiber movement analysis device in a resin according to claim 1, which is configured.
At a certain point of time, based on the resin flow analysis unit that analyzes the flow state of the resin flowing in the region, and the resin flow velocity calculated by the resin flow analysis unit, the flow of the fiber flowing together with the resin is determined. With a fiber analysis unit for analysis,
The fiber analysis unit,
The fiber, a plurality of nodes, a fiber modeling unit for modeling by a rod element connected by the nodes,
At a position corresponding to the node, including a resin velocity acquisition unit that acquires the flow velocity of the resin analyzed by the resin flow analysis unit,
While calculating the movement of the fiber based on the flow velocity of the resin, the density of the fiber and the degree of bending of the fiber at the position corresponding to the node is calculated, the density of the fiber and the degree of bending of the fiber. Based on at least one of the above, further comprising a resin viscosity correction unit for correcting the viscosity of the resin at the next time point,
The resin flow analysis unit calculates the flow of the resin and the fiber at the next point in time based on the viscosity of the resin corrected by the resin viscosity correction unit, and a fiber movement analysis device in the resin.
Analyzing at least the flow velocity of the resin flowing in the region,
A step of modeling a fiber flowing with the resin by a plurality of nodes and a rod element connected by the nodes;
Acquiring the analyzed flow velocity of the resin at a position corresponding to the node,
Based on at least one of the density of the fibers at the position corresponding to the node and the degree of bending of the fiber, correcting the flow velocity of the resin at the position corresponding to the acquired node,
Analyzing the movement of the fiber in the resin based on the corrected flow velocity of the resin, the method for analyzing the movement of the fiber in the resin.
Analyzing at least the flow velocity of the resin flowing in the region,
A step of modeling a fiber flowing with the resin by a plurality of nodes and a rod element connected by the nodes;
Acquiring the analyzed flow velocity of the resin at a position corresponding to the node,
Based on at least one of the density of the fibers at the position corresponding to the node and the degree of bending of the fiber, correcting the flow velocity of the resin at the position corresponding to the acquired node,
Analyzing the movement of the fibers in the resin based on the corrected flow velocity of the resin.
Analyzing at least the flow velocity of the resin flowing in the region,
A step of modeling a fiber flowing with the resin by a plurality of nodes and a rod element connected by the nodes;
Acquiring the analyzed flow velocity of the resin at a position corresponding to the node,
Based on at least one of the density of the fibers at the position corresponding to the node and the degree of bending of the fiber, correcting the flow velocity of the resin at the position corresponding to the acquired node,
Storing the program, and analyzing the movement of the fibers in the resin based on the corrected flow velocity of the resin.