CN106250648B - A kind of structure analysis method for glass fiber reinforced materials and based on abaqus and moldflow emulation - Google Patents
A kind of structure analysis method for glass fiber reinforced materials and based on abaqus and moldflow emulation Download PDFInfo
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Abstract
The present invention proposes a kind of structure analysis method for glass fiber reinforced materials and based on abaqus and moldflow associative simulation, and this method will be in the gridding information that the fiber distribution situation and directional information that stream mould software moldflow is calculated are importing directly into abaqus by Run Script file.As long as keeping consistent with geometrical model when stream mould analysis, researcher can repartition grid using geometrical model according to their own needs, and researcher can assign material properties according to test data after having mapped machine direction.Job can be submitted to be calculated after completing the definition that model boundary condition applies and field variable, time export in abaqus.Such method has combined two kinds of softwares of abaqus and moldflow and has carried out mold flow analysis and structural analysis, can be applicable in complex model and complex working condition.Mutually relatively before method, such method is more flexible, while it by third party software, can not be applicable in the grid inconsistent situation of the stream mould grid analyzed and structural analysis, can also meet researcher to the customized requirement of material.
Description
Technical field
The present invention relates to the structure analysis methods for being directed to glass fiber reinforced materials, specially a kind of to be directed to glass fiber reinforced materials simultaneously
Structure analysis method based on abaqus and moldflow associative simulation.
Background technique
Currently, research fibre reinforced composites have become the technical issues of paying attention in the world, at military aspect: flying
Machine, rocket, artificial satellite, naval vessels, etc. military equipments all gradually form very composite material manufacture；At civilian aspect: compound
Material played an important role in fields such as means of transport, building structure, Medical Instruments.Fibrous composite is according to structure
Appearance formula is divided into: single layer composite, laminated composite material, short fiber composite material.Short fiber composite material main application
Field is automobile industry, can be used for the manufacture of constitutional detail；It can be used for the manufacture of aircraft interior non-structural part；Fiber is assigned
The good thermodynamic property of product is given, short fiber composite material is also applied for manufacturing the device close to heat source.In addition in electrical electricity
It is also widely used in terms of son and household appliance.
Different composite material has different manufacturing methods, and injection molding is a kind of important processing side of short fiber composite material
Method.In injection molding process, fiber flows in mold cavity together with matrix, generates staple fiber in different positions
Different orientation, to make the different location in material and product after molding that different microstructures be presented.In forming process
In, melt temperature, injection pressure, die profile and working process parameter can all have an impact the end-state of fiber.
In addition to this, the composite wood with diverse microcosmic structure and mechanical property can also be obtained by the selection and matching of component material
Material.In order to which short glass fiber reinforcing material is preferably applied in life, for short glass fiber reinforcing material mechanical property research just
Seem and becomes more and more important.Following three kinds of methods: (1) short fibre are broadly divided into for the main approaches of short fiber reinforced product now
Dimension enhanced article generally passes through injection molding, and Moldflow carries out the flow process and its generation result of matrix in injection moulding process
Relatively consider comprehensively, so can be carried out the various aspects such as filling, pressure maintaining, cooling, warpage, fiber orientation in Moldflow
Analysis.(2) combine two kinds of softwares of Abaqus and Mlodflow and carry out mold flow analysis and structural analysis.Because of the structure of injection-molded item
Analysis can not be carried out by general injection molding CAE, it is also necessary to which other outstanding structure analysis softwares, Abaqus become already
The generally acknowledged strongest general outstanding finite element of function in the industry, abaqus have direct and moldflow interface, it is possible to directly
Mold flow analysis and structural analysis are carried out by two kinds of softwares of joint Abaqus and Mlodflow, also becomes prediction and verifies to short
The effective means of fibre reinforced composites mechanical property.(3) joint tri- kinds of softwares of Abaqus, digimat and Mlodflow into
Row mold flow analysis and structural analysis.Fiber distribution situation and directional information in the structure are obtained using Moldflow first；So
The mapping of machine direction data is realized using Digimat afterwards；The finite element analysis of structure is finally carried out using Abaqus.However mesh
There are some problems again in three kinds of preceding methods: for first method, since Moldflow is not the structure analysis software of profession,
So by Moldflow some simple structural analyses can only be carried out for naive model, researcher can not be obtained sometimes
Desired analysis result；For second method, combines two kinds of softwares of Abaqus and Mlodflow and carry out mold flow analysis and structure
Analysis can carry out structural analysis to labyrinth, however should need abaqus in this way although comparing first method
It is more harsh for the hardware requirement of user in this way with the exact matching of moldflow software version, and this mapping side
Method has strict requirements for the grid of analysis model, and flexibility is not high；For the third method by third party software
Digimat, because introducing software of the third party makes calculation method become complicated and expend more funds, and this method is
According to the two-phase that material includes deduce come material constitutive be mapped in structured grid, actual process production material mechanics
Performance and the result of prediction are not consistent, and the result of prediction is brought into progress structural analysis in structure and is inaccurate.
Summary of the invention
In order to solve the problems existing in the prior art, the invention proposes one kind for glass fiber reinforced materials and to be based on abaqus
With the structure analysis method of moldflow associative simulation, the fiber being calculated in stream mould software moldflow is distributed by this method
Situation and directional information are importing directly into the gridding information of abaqus by Run Script file.Effect is calculated in order to improve
Rate, as long as keeping consistent with geometrical model when stream mould analysis, researcher can utilize geometrical model according to their own needs
Grid is repartitioned, researcher can assign material properties according to test data after having mapped machine direction, and researcher can also
To assign material properties by writing subprogram.The application of model boundary condition and field variable are completed in abaqus, time output
Job can be submitted to be calculated after definition.Such method has combined two kinds of softwares of abaqus and moldflow and has carried out mould flow point
Analysis and structural analysis, can be applicable in complex model and complex working condition.Mutually relatively before integrated processes, such method is more flexible,
It by third party software, can not be applicable in stream mould analysis grid and structural analysis grid inconsistent situation while, also
Researcher be can satisfy to the customized requirement of material.
The technical solution of the present invention is as follows:
A kind of structure analysis method for glass fiber reinforced materials and based on abaqus and moldflow associative simulation,
It is characterized by comprising following steps:
Step 1: stream mould analysis is carried out by importing in moldflow software containing the geometrical model of glass fiber reinforced materials structure,
Distribution situation of the fiber in glass fiber reinforced materials structure is obtained, and the interface for passing through abaqus software and moldflow software will
The distribution situation exports as the identifiable file of abaqus software；The distribution situation includes institute in glass fiber reinforced materials structure
There are the nodal information and unit information and unit volume size of unit；
Step 2: according to the requirement of structural analysis to the geometry mould containing glass fiber reinforced materials structure in abaqus software
Type repartitions grid, and exports the gridding information repartitioned；The gridding information repartitioned includes repartitioning net
The nodal information of all units and unit information and unit volume size in lattice；
Step 3: the grid A that stream mould is analyzed being carried out with step 1 to the grid B that step 2 is repartitioned in abaqus software
Carry out information matches: the information matches are crossed referred to as: being carried out since first unit of grid A with each unit of grid B
The matching analysis, matching criteria are to judge that two carry out whether matched unit centroid coordinate distance is less than given threshold；According to
With as a result, the machine direction information of unit in grid A is assigned to matched unit in grid B；
Step 4: to by step 3, treated that grid B carries out structural analysis in abaqus.
Further preferred embodiment, it is described a kind of for glass fiber reinforced materials and imitative based on abaqus and moldflow joint
Genuine structure analysis method, it is characterised in that: in step 3, by batch process in abaqus software, in step 2
The grid A that stream mould analysis is carried out in the grid B and step 1 repartitioned carries out information matches.
Further preferred embodiment, it is described a kind of for glass fiber reinforced materials and imitative based on abaqus and moldflow joint
Genuine structure analysis method, it is characterised in that: in step 3, according to matching result, by the machine direction information of unit in grid A
It is assigned in grid B in matched unit process, if multiple units in a units match grid B in grid A, by grid
The machine direction information of unit is assigned to matched multiple units in grid B in A, if in grid A in multiple units match grid B
A unit, then assigned after being calculated according to machine direction information of the volume weighting averaging method to multiple units in grid A
Give matched unit in grid B.
Beneficial effect
According to the present invention it is possible to not by third party software, it is different in the grid of stream mould analysis and the grid of structural analysis
In the case of cause, the cell orientation information for flowing mould analysis is imported into the unit for carrying out structural analysis；It can also meet simultaneously and grind
Personnel are studied carefully to the customized requirement of material, and carry out complex model and complex working condition structural analysis in abaqus.
Additional aspect and advantage of the invention will be set forth in part in the description, and will partially become from the following description
Obviously, or practice through the invention is recognized.
Detailed description of the invention
Above-mentioned and/or additional aspect of the invention and advantage will become from the description of the embodiment in conjunction with the following figures
Obviously and it is readily appreciated that, in which:
Fig. 1: the principle of the present invention block diagram；
Fig. 2: flow chart of the invention.
Specific embodiment
The embodiment of the present invention is described below in detail, the embodiment is exemplary, it is intended to it is used to explain the present invention, and
It is not considered as limiting the invention.
Present invention is generally directed at present to short fiber reinforced product research method there are the problem of, propose a kind of for glass
Fiber reinforced materials and structure analysis method based on abaqus and moldflow associative simulation, this method will be in stream mould softwares
The fiber distribution situation and directional information that moldflow is calculated are importing directly into abaqus's by Run Script file
In gridding information.In order to improve computational efficiency, as long as keeping consistent with geometrical model when stream mould analysis, researcher can root
Grid is repartitioned according to the demand utilization geometrical model of oneself, researcher can be according to test data after having mapped machine direction
Material properties are assigned, researcher can also assign material properties by writing subprogram.Model boundary condition is completed in abaqus
Application and field variable can submit Job to be calculated after the definition of time output.Such method combined abaqus and
Two kinds of softwares of moldflow carry out mold flow analysis and structural analysis, can be applicable in complex model and complex working condition.Mutually relatively before
Integrated processes, such method is more flexible, it by third party software, can not be applicable in grid and the structural analysis of stream mould analysis
Grid inconsistent situation while, researcher can also be met to the customized requirement of material.
Specifically includes the following steps:
Step 1: stream mould analysis is carried out by importing in moldflow software containing the geometrical model of glass fiber reinforced materials structure,
Distribution situation of the fiber in glass fiber reinforced materials structure is obtained, and the interface for passing through abaqus software and moldflow software will
The distribution situation exports as the identifiable file of abaqus software；The distribution situation includes institute in glass fiber reinforced materials structure
There are the nodal information and unit information and unit volume size of unit；Wherein unit information includes the machine direction letter of unit
Breath.
Step 2: according to the requirement of structural analysis to the geometry mould containing glass fiber reinforced materials structure in abaqus software
Type repartitions grid, and exports the gridding information repartitioned；The gridding information repartitioned includes repartitioning net
The nodal information of all units and unit information and unit volume size in lattice.
Step 3: the grid A that stream mould is analyzed being carried out with step 1 to the grid B that step 2 is repartitioned in abaqus software
Carry out information matches: the information matches are crossed referred to as: being carried out since first unit of grid A with each unit of grid B
The matching analysis, matching criteria are to judge that two carry out whether matched unit centroid coordinate distance is less than given threshold；According to
With as a result, the machine direction information of unit in grid A is assigned to matched unit in grid B.
When being realized in abaqus software, it can be realized by batch process.In addition, the time is calculated in order to save,
Improve computational efficiency, it may appear that carry out the case where element number of grid A when units match is less than grid unit B quantity, at this time
It will appear multiple units in a units match grid B in grid A, then the machine direction information of unit is assigned in grid A
Matched multiple units in grid B.And in order to improve computational accuracy, it may appear that carry out the element number of grid A when units match
The case where more than grid unit B quantity, will appear a unit in grid A in multiple units match grid B, then basis at this time
Volume weighting averaging method assigns matched list in grid B after calculating the machine direction information of multiple units in grid A
Member.
Step 4: to by step 3, treated that grid B carries out structural analysis in abaqus.
Specific embodiment is given below in step based on the above principles:
(1) after moldflow is analyzed, machine direction distribution results file is exported by moldflow internal command
With model unit message file, fiber distribution results include flowing the machine direction of each unit in mould model, and machine direction is
It is indicated by 6 direction component of tensors, the vector of preceding 3 direction tensors composition indicates machine direction, rear three direction tensors
Indicate with the fiber institute planar direction vector vertical with fiber, model unit information is including flowing each unit packet in mould model
The coordinate of the node and each node that contain, the message file are all existing in the form of data, these data at this time
Abaqus and nonrecognition.
Concrete operations are as follows: in menu bar View → User Interface:Command line of moldflow software, make
With mpi2abaqus order.
(2) it is converted the model information for obtaining carrying out stream mould analysis to by the interface of abaqus and moldflow
The format that abaqus can be identified.The nodal information of units all in model at this time and unit information and unit volume is big
It is small, it is saved in unique file.Model unit information includes flowing the node that each unit includes in mould model, the coordinate of each node
And the volume of each unit, the message file are all existing in the form of data.
Concrete operations are as follows: the starting interface DOS inputs abaqus moldflow job=box 3D at the interface DOS
Element_order=1.
(3) model is carried out to repartition grid according to the requirement of structural analysis in abaqus, grid mould will be finished again
The model information of type includes the nodal information of all units and unit information and unit volume size in model, is saved in independence
File.Model unit information includes the node that each unit includes in Structural Analysis Model, the coordinate of each node and each
The volume of unit, the message file are all existing in the form of data.
(4) batch process to abaqus may be implemented by writing script file, using following in script file
Ring sentence can each unit of each unit to structural model and stream mould model traverse, judge two units whether
The method matched is:
Assuming that a is some unit of structural model grid B, b is some unit for flowing mould model meshes A；A unit
Centroid coordinate be (x1, y1, z1)、b(x2, y2, z2)；
As long as distance < tolerance, then b and a is matched, and wherein tolerance is user oneself definition
With standard.
For many-one model: then by script file directly using cell orientation tensor corresponding to b unit as the unit of a
Direction is assigned to a.Specific code are as follows:
P=mdb.models [' box'] .parts [' PART-1']
E=p.elements
Elements=e.sequenceFromLabels ([a])
Region=regionToolset.Region (elements=elements)
Mdb.models [' box'] .parts [' PART-1'] .MaterialOrientation (region=region,
OrientationType=DISCRETE, axis=AXIS_1, normalAxisDefinition=VECTOR,
NormalAxisVector=(b11, b12, b13), flipNormalDirection=False,
NormalAxisDirection=AXIS_3, primaryAxisDefinition=VECTOR,
PrimaryAxisVector=(b21, b22, b23), primaryAxisDirection=AXIS_1,
FlipPrimaryDirection=False, additionalRotationType=ROTATION_NONE,
Angle=0.0, additionalRotationField=", stackDirection=STACK_3)
For a pair of of multi-model: then being added all and matched b unit of a direction tensor by volume by script file
Cell orientation after power as a is assigned to a.
Specific code are as follows:
P=mdb.models [' box'] .parts [' PART-1']
E=p.elements
Elements=e.sequenceFromLabels ([a])
Region=regionToolset.Region (elements=elements)
Mdb.models [' box'] .parts [' PART-1'] .MaterialOrientation (region=region,
OrientationType=DISCRETE, axis=AXIS_1, normalAxisDefinition=VECTOR,
NormalAxisVector=(a11, a12, a13), flipNormalDirection=False,
NormalAxisDirection=AXIS_3, primaryAxisDefinition=VECTOR,
PrimaryAxisVector=(a21, a22, a23), primaryAxisDirection=AXIS_1,
FlipPrimaryDirection=False, additionalRotationType=ROTATION_NONE,
Angle=0.0, additionalRotationField=", stackDirection=STACK_3)
(6) after having mapped cell orientation, researcher assigns material in the material module of abaqus according to material context
After expecting attribute, addition boundary condition can submit calculating, carry out structural analysis.
Although the embodiments of the present invention has been shown and described above, it is to be understood that above-described embodiment is example
Property, it is not considered as limiting the invention, those skilled in the art are not departing from the principle of the present invention and objective
In the case where can make changes, modifications, alterations, and variations to the above described embodiments within the scope of the invention.
Claims (2)
1. a kind of structure analysis method for glass fiber reinforced materials and based on abaqus and moldflow associative simulation, feature
It is: the following steps are included:
Step 1: carrying out stream mould analysis for importing in moldflow software containing the geometrical model of glass fiber reinforced materials structure, obtain
Distribution situation of the fiber in glass fiber reinforced materials structure, and will be described by the interface of abaqus software and moldflow software
Distribution situation exports as the identifiable file of abaqus software；The distribution situation includes all lists in glass fiber reinforced materials structure
The nodal information and unit information and unit volume size of member；
Step 2: according to the requirement of structural analysis to the geometrical model weight containing glass fiber reinforced materials structure in abaqus software
New grid division, and export the gridding information repartitioned；The gridding information repartitioned includes repartitioning in grid
The nodal information and unit information and unit volume size of all units；
Step 3: the grid B that step 2 the is repartitioned grid A for carrying out stream mould analysis with step 1 being carried out in abaqus software
Information matches: the information matches are crossed referred to as: being matched since first unit of grid A with each unit of grid B
Analysis, matching criteria are to judge that two carry out whether matched unit centroid coordinate distance is less than given threshold；It is tied according to matching
The machine direction information of unit in grid A is assigned to matched unit in grid B by fruit；By the machine direction letter of unit in grid A
Breath is assigned in grid B in matched unit process, if multiple units in a units match grid B in grid A, by net
The machine direction information of unit is assigned to matched multiple units in grid B in lattice A, if in grid A in multiple units match grid B
A unit, then assigned after being calculated according to machine direction information of the volume weighting averaging method to multiple units in grid A
Give matched unit in grid B；
Step 4: to by step 3, treated that grid B carries out structural analysis in abaqus.
2. a kind of knot for glass fiber reinforced materials and based on abaqus and moldflow associative simulation according to claim 1
Structure analysis method, it is characterised in that: in step 3, by batch process in abaqus software, to being drawn again in step 2
The grid A that stream mould analysis is carried out in the grid B and step 1 divided carries out information matches.
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| CN107291978B (en) * | 2017-05-05 | 2020-08-28 | 广州汽车集团股份有限公司 | Mechanical simulation method and device for glass fiber material part |
| CN107742005B (en) * | 2017-09-01 | 2021-05-04 | 杭州健途科技有限公司 | Method for predicting and controlling structural mechanical property of fiber reinforced composite material |
| CN111027248B (en) * | 2019-12-09 | 2023-09-05 | 武汉数字化设计与制造创新中心有限公司 | Automatic creation method and system for analysis model of local structure of injection mold |
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| US8065028B1 (en) * | 2007-04-24 | 2011-11-22 | Nasser Saebi | Method of constructing a composite structure |
| CN103886163A (en) * | 2014-04-14 | 2014-06-25 | 湘潭大学 | Meshing method of finite element model of turbine blade thermal barrier coating |
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| US8065028B1 (en) * | 2007-04-24 | 2011-11-22 | Nasser Saebi | Method of constructing a composite structure |
| CN103886163A (en) * | 2014-04-14 | 2014-06-25 | 湘潭大学 | Meshing method of finite element model of turbine blade thermal barrier coating |
Non-Patent Citations (1)
| Title |
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| 汽车防擦条翘曲优化与反变形预补偿设计;陈聚阳;《中国优秀硕士学位论文全文数据库 工程科技Ⅱ辑》;20150315;第C035-358/11、22、35-36、45页 |
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