CN114154284A - Steering knuckle static strength test data processing method and device and storage medium - Google Patents

Steering knuckle static strength test data processing method and device and storage medium Download PDF

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Publication number
CN114154284A
CN114154284A CN202010931193.8A CN202010931193A CN114154284A CN 114154284 A CN114154284 A CN 114154284A CN 202010931193 A CN202010931193 A CN 202010931193A CN 114154284 A CN114154284 A CN 114154284A
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auxiliary line
knuckle
test
steering knuckle
slope
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黄禹霆
蒋凌山
龙岩
刘雪强
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FAW Volkswagen Automotive Co Ltd
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FAW Volkswagen Automotive Co Ltd
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Priority to CN202010931193.8A priority Critical patent/CN114154284A/en
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    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F30/00—Computer-aided design [CAD]
    • G06F30/20—Design optimisation, verification or simulation
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F30/00—Computer-aided design [CAD]
    • G06F30/10—Geometric CAD
    • G06F30/15—Vehicle, aircraft or watercraft design
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F30/00—Computer-aided design [CAD]
    • G06F30/10—Geometric CAD
    • G06F30/17—Mechanical parametric or variational design
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F2119/00—Details relating to the type or aim of the analysis or the optimisation
    • G06F2119/14—Force analysis or force optimisation, e.g. static or dynamic forces

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  • Physics & Mathematics (AREA)
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  • General Engineering & Computer Science (AREA)
  • Pure & Applied Mathematics (AREA)
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  • Mathematical Analysis (AREA)
  • Computational Mathematics (AREA)
  • Automation & Control Theory (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)

Abstract

The invention provides a method and a device for processing data of a steering knuckle static strength test and a storage medium. The method comprises the following steps: acquiring a test curve according to the static strength test data of the steering knuckle; determining the slope of the undeformed segment of the knuckle in the test curve according to the data in the specified interval of the force applied in the static strength test data of the knuckle, and acquiring the rigidity of the knuckle according to the slope; obtaining a yield strength auxiliary line according to the slope and a predetermined reference plastic deformation; determining the intersection point of the yield strength auxiliary line and the test curve so as to obtain the plastic deformation starting point of the steering knuckle; acquiring a breaking strength auxiliary line according to the part breaking point and the slope in the test data; and determining the deformation amount of the steering knuckle when the steering knuckle cracks according to the test curve and the breaking strength auxiliary line. The method, the device and the storage medium can ensure the calculation precision, improve the precision of the test result and improve the test efficiency.

Description

Steering knuckle static strength test data processing method and device and storage medium
Technical Field
Embodiments of the present invention generally relate to the field of automobile manufacturing, and more particularly, to a method and apparatus for processing data of a static strength test of a knuckle, and a machine-readable storage medium.
Background
At present, the static strength test of the steering knuckle is completed through a hydraulic cylinder or an electric tension and compression machine, and subsequent data processing needs an engineer to manually draw pictures and analyze and evaluate the data.
The data pattern does not vary from vehicle type to vehicle type, and the data processing work is completely repetitive work for engineers. Moreover, the evaluation of the static strength test data of the steering knuckle needs post-processing work such as fitting and the like on the data, and the work cannot be accurately finished manually, so that the accuracy of a test result is reduced due to improper post-processing method of the test data.
Disclosure of Invention
In order to solve the above problems in the prior art, in a first aspect, an embodiment of the present invention provides a method for processing data of a static strength test of a steering knuckle, the method including: acquiring a test curve according to knuckle static strength test data, wherein the test data comprises force applied to the knuckle and deformation of the knuckle under the action of the applied force; determining the slope of the undeformed segment of the knuckle in the test curve according to the data in the specified interval of the applied force in the knuckle static strength test data, and acquiring the rigidity of the knuckle according to the slope; obtaining a yield strength auxiliary line according to the slope and a predetermined reference plastic deformation; determining the intersection point of the yield strength auxiliary line and the test curve so as to obtain the plastic deformation starting point of the steering knuckle; acquiring a breaking strength auxiliary line according to the part breaking point and the slope in the test data; and determining the deformation amount of the steering knuckle when the steering knuckle cracks according to the test curve and the breaking strength auxiliary line.
In some embodiments, obtaining the yield strength auxiliary line based on the slope and a predetermined reference plastic deformation amount includes: and drawing a straight line by using the slope through a point corresponding to the reference plastic deformation amount as the yield strength auxiliary line, wherein the applied force of the point corresponding to the reference plastic deformation amount is zero.
In some embodiments, obtaining a breaking strength auxiliary line from the part breaking point and the slope in the test data comprises: and drawing a straight line with the slope through the part breaking point to serve as the breaking strength auxiliary line.
In some embodiments, determining the amount of deformation of the knuckle when cracked, based on the test curve and the breaking strength auxiliary line, comprises: and acquiring an intersection point of the breaking strength auxiliary line and an axis representing deformation in coordinate axes of the test curve, and determining the value of the deformation at the intersection point as the deformation when the steering knuckle cracks.
In some embodiments, the specified interval of applied force comprises a default interval or a user-entered specified interval of the applied force.
In some embodiments, determining the intersection of the yield strength auxiliary line and the test curve comprises: calculating the difference value between the value of the force applied on the yield strength auxiliary line and the value of the force applied on the test curve aiming at the same deformation amount according to the sequence of the deformation amounts from small to large; acquiring a first difference value larger than zero on the yield strength auxiliary line; and determining a point on the test curve corresponding to the deformation according to the deformation of the point on the yield strength auxiliary line, wherein the first difference is larger than zero, and the point is used as the intersection point of the yield strength auxiliary line and the test curve.
In some embodiments, the method further comprises: calculating a difference between the stiffness and a standard stiffness of the knuckle; and/or calculating the difference value between the deformation amount of the steering knuckle when the steering knuckle cracks and the standard deformation amount of the steering knuckle when the steering knuckle cracks.
In some embodiments, the method further comprises: and displaying one or more of the test curve, the yield strength auxiliary line, the breaking strength auxiliary line, a point corresponding to the reference plastic deformation amount, a point corresponding to the deformation amount when the steering knuckle cracks, the plastic deformation starting point and the breaking point.
In a second aspect, an embodiment of the present invention provides a data processing apparatus for a static strength test of a knuckle, the apparatus including: the test curve acquisition module is used for acquiring a test curve according to the static strength test data of the steering knuckle, wherein the test data comprises force applied to the steering knuckle and deformation of the steering knuckle under the action of the applied force; the slope determining module is used for determining the slope of the undeformed segment of the steering knuckle in the test curve according to the data in the specified interval of the applied force in the static strength test data of the steering knuckle and acquiring the rigidity of the steering knuckle according to the slope; the yield strength auxiliary line acquisition module is used for acquiring a yield strength auxiliary line according to the slope and a predetermined reference plastic deformation amount; the plastic deformation starting point obtaining module is used for determining the intersection point of the yield strength auxiliary line and the test curve so as to obtain the plastic deformation starting point of the steering knuckle; the breaking strength auxiliary line obtaining module is used for obtaining a breaking strength auxiliary line according to the part breaking point and the slope in the test data; and the crack deformation amount acquisition module is used for determining the deformation amount of the steering knuckle when the crack is generated according to the test curve and the breaking strength auxiliary line.
In a third aspect, embodiments of the present invention provide a machine-readable storage medium storing a computer program which, when executed, performs the method of any of the above embodiments.
The method, the device and the storage medium for processing the steering knuckle static strength test data provided by the embodiment of the invention can be used for importing the test data obtained by test equipment in batches, automatically fitting and solving the data and extracting key evaluation points. The automatic data processing result is accurate, and the situation that in the prior art, the slope of the curve cannot be accurately fitted by calculation of a human working diagram, so that all subsequent calculation results have large errors is avoided. The automatic data processing can ensure the calculation precision, thereby improving the precision of the test result. In addition, the automatic data processing can rapidly process the data in batches, all data in one test can be processed at one time, and the test efficiency is improved.
Drawings
The above and other objects, features and advantages of embodiments of the present invention will become readily apparent from the following detailed description read in conjunction with the accompanying drawings. Several embodiments of the invention are illustrated by way of example, and not by way of limitation, in the figures of the accompanying drawings and in which:
FIG. 1 shows a flow chart of a method of processing knuckle static strength test data according to an embodiment of the invention;
FIG. 2 shows a schematic view of a knuckle static strength test curve pattern according to an embodiment of the invention;
FIG. 3 illustrates a knuckle static strength test data handling program interface diagram according to an embodiment of the invention;
fig. 4 shows a block diagram of a knuckle static strength test data processing device according to an embodiment of the present invention.
In the drawings, the same or corresponding reference numerals indicate the same or corresponding parts.
Detailed Description
The principles and spirit of the present invention will be described with reference to a number of exemplary embodiments. It is understood that these embodiments are given solely for the purpose of enabling those skilled in the art to better understand and to practice the invention, and are not intended to limit the scope of the invention in any way.
In one aspect, embodiments of the present invention provide a method for processing data of a static strength test of a steering knuckle. Referring to fig. 1, there is shown a flowchart of a knuckle static strength test data processing method according to an embodiment of the present invention. As shown in FIG. 1, the method 100 includes steps S101-S106.
In step S101, a test curve is obtained according to the knuckle static strength test data, wherein the test data includes a force applied to the knuckle and a deformation amount of the knuckle under the applied force.
As an example, the knuckle static strength test data may be stored in advance or imported from the outside at the start of the program. When test data is imported in batches, the number and format of the test data can be checked before obtaining the test curve. If the verification is not passed, an error can be reported, and a user is prompted. If the check passes, all test data may be imported in a sequential loop.
By way of example, the data formats supported by the method may include spreadsheet (e.g., Excel) and text (e.g., Txt) data formats, as well as other suitable data formats, including the ability to extend the data interface.
In step S102, the slope of the undeformed section of the knuckle in the test curve is determined from the data within the specified interval of the applied force in the knuckle static strength test data, and the stiffness of the knuckle is obtained from the slope. The data in the designated interval may include all data in the designated interval, or may include partial data in the designated interval, for example, data selected at intervals in the designated interval, data designating an end point of the interval, and the like.
As an embodiment of the present invention, the designated interval of the applied force includes a default interval or a designated interval of the applied force input by the user. For example, the default interval may be selected based on experimental experience, and the default interval may be modified.
As an example, the curve segment in the designated interval can be extracted separately, for example, a solution is performed by using a ployfit function of Matlab, and the solution formula is as follows:
[p,S]＝polyfit(x,y,n)
wherein, p is the slope of the segment to be solved, x, y are the discrete coordinates of the curve, n is the solving order, and since the straight line solving is involved, n is 1.
In step S103, a yield strength auxiliary line is obtained from the slope and a predetermined reference plastic deformation amount. As an example, the reference plastic deformation amount may be predetermined according to the model of the knuckle, or may be given by a standard.
In step S104, the intersection of the yield strength auxiliary line and the test curve is determined, thereby obtaining the plastic deformation starting point of the knuckle.
In step S105, a breaking strength auxiliary line is obtained from the part breaking point and the slope in the test data. As an example, the point in the test data where the applied force is the greatest may be taken as the part break point.
In step S106, the amount of deformation when the knuckle cracks is determined from the test curve and the breaking strength auxiliary line.
The steering knuckle static strength test data processing method provided by the embodiment of the invention can be used for importing test data obtained by test equipment in batches, automatically fitting and solving the data and extracting key evaluation points. The automatic data processing result is accurate, and the situation that the slopes of L1 and L2 cannot be accurately fitted by human working diagram calculation in the prior art so that all subsequent calculation results have large errors is avoided. The automatic data processing can ensure the calculation precision, thereby improving the precision of the test result. In addition, the automatic data processing can rapidly process the data in batches, all data in one test can be processed at one time, and the test efficiency is improved.
Referring to fig. 2, a schematic diagram of a knuckle static strength test curve pattern according to an embodiment of the invention is shown. The vertical axis represents a force applied to the knuckle, the horizontal axis represents a deformation amount of the knuckle due to the applied force, the solid line represents a knuckle static strength test curve, the broken line L1 represents a yield strength auxiliary line, the broken line L2 represents a breaking strength auxiliary line, B1 represents a point corresponding to a reference plastic deformation amount, B2 represents a point corresponding to a deformation amount when the knuckle cracks, points F1(Fx1, Fy1) represent intersection points of the yield strength auxiliary line and the test curve, and points F2(Fx2, Fy2) represent part breaking points. It is noted that the units in the coordinate system in fig. 2 are schematic and that for the sake of clarity of presentation the values on the horizontal axis are schematic and the values on the vertical axis are not shown. In practical application, the units and values can be adjusted appropriately according to the visualization requirement.
As an example, a section between the start point of the test curve and F1(Fx1, Fy1) represents a knuckle undeformed section, a section between point F1(Fx1, Fy1) and point F2(Fx2, Fy2) represents a knuckle plastically deformed section, and a section from point F2(Fx2, Fy2) to the end point represents a knuckle broken section.
As shown in fig. 2, as an embodiment of the present invention, obtaining the yield strength auxiliary line according to the slope and the predetermined reference plastic deformation amount may include: a straight line L1 is drawn as a yield strength auxiliary line with the slope derived above through the point B1 corresponding to the reference plastic deformation amount, where the point B1 corresponding to the reference plastic deformation amount is located on the horizontal axis and the applied force is zero. In other embodiments, the force applied at the point corresponding to the reference amount of plastic deformation may be different from zero.
As an embodiment of the present invention, determining the intersection of the yield strength auxiliary line and the test curve may include: calculating the difference between the value of the force applied to the yield strength auxiliary line L1 and the value of the force applied to the test curve for the same deformation in the order of the deformation from small to large; acquiring a first difference value larger than zero on the yield strength auxiliary line L1; and determining a point on the test curve corresponding to the deformation according to the deformation of the first difference value larger than zero on the yield strength auxiliary line, and taking the point as the intersection point of the yield strength auxiliary line and the test curve.
In other words, a mathematical expression of the L1 line can be found, from which the corresponding y value on the L1 line can be found using the L1 mathematical expression with the x abscissa of the discrete point in the original test data, at which a discrete L1 data point can be obtained. The Y coordinate of the line L1 may then be subtracted from the Y coordinate of the original test curve, and the first point where the difference is greater than 0 may be taken as the intersection of the line L1 and the original test curve, i.e., the point (Fx1, Fy 1). The solving method is simple and efficient, the calculation accuracy can reach 0.1%, and the calculation accuracy is within the error range allowed by the test.
As another embodiment, determining the intersection of the yield strength auxiliary line and the test curve may include: the fitting expression of the test curve is solved first, and then the intersection point coordinates are solved in combination with the mathematical expression of L1. The embodiment has high precision, but the non-linearity problem of the test curve causes large calculation amount and low efficiency.
As an embodiment of the invention, the step of obtaining the breaking strength auxiliary line according to the part breaking point and the slope in the test data comprises the following steps: a straight line L2 is drawn with the above-described slope through the part breaking point F2(Fx2, Fy2) as a breaking strength auxiliary line. For example, from the slope of the L1 segment obtained above, the mathematical expression of the L2 curve can be obtained by combining the coordinates of the point (Fx2, Fy2) where the Y value of the original test curve is the maximum.
In one embodiment of the present invention, the determining the amount of deformation when the knuckle cracks based on the test curve and the breaking strength auxiliary line includes: an intersection B2 of the breaking strength auxiliary line L2 and an axis (in the example shown in fig. 2, the X axis) indicating the amount of deformation among the coordinate axes of the test curve was obtained, and the numerical value of the amount of deformation at the intersection was determined as the amount of deformation when the crack occurred in the knuckle.
Referring to fig. 3, a data processing program interface diagram of a knuckle static strength test according to an embodiment of the present invention is shown.
As shown in fig. 3, the program interface mainly includes a display area and an operation area. The user may select a specified interval of applied force, i.e., a specified range of Y-coordinate values, for which the fit segment is desired, in the example of fig. 3, the specified interval being 0N-5000N. Then, the user can pop up a data selection dialog box by clicking 'data preview', all the test data can be selected at one time, and certainly, the processing program can also select all the data by default without manual selection of the user. Then, the processing program will automatically start to run according to the flowchart of fig. 1, and after all calculations are completed, a preview curve will be generated in the preview frame. One or more of a test curve, a yield strength auxiliary line, a breaking strength auxiliary line, a point corresponding to a reference plastic deformation amount, a point corresponding to a deformation amount when a crack is generated in a steering knuckle, a plastic deformation starting point and a breaking point can be displayed in the preview frame.
If all curves are confirmed to be calculated without errors, the user can click a 'report generation' button, and the processing program can automatically arrange the test data, the test curves and the test results to generate a test result report, such as a Word version test result report.
The steering knuckle static strength test data processing method provided by the embodiment of the invention can be used for drawing a test curve, and finally arranging and typesetting the curve, the extracted data points and the solved evaluation result to automatically generate a visual test result report.
As an embodiment of the present invention, the method further comprises: calculating a difference between the stiffness and a standard stiffness of the knuckle; and/or calculating the difference value between the deformation of the steering knuckle when the steering knuckle cracks and the standard deformation of the steering knuckle when the steering knuckle cracks, so that whether the test data of the part is qualified or not can be automatically judged. As an example, the difference value and the result of the determination of whether the difference value is qualified may be displayed in the program interface of fig. 3.
In one embodiment, the standard stiffness of the knuckle and the standard deformation amount at the time of occurrence of a crack may be fixed values.
As another embodiment, the method may further include: receiving a test standard input by a user; and determining the standard rigidity of the steering knuckle and the standard deformation when the crack is generated according to the test standard input by the user. The standard stiffness of the knuckle and the standard deformation amount when a crack is generated can be set according to the input or selection of a user in a program interface. The test standard may be a name of the test standard input by the user, or may be a test standard corresponding to a model of the device or other information input by the user. As shown in FIG. 3, in this example the user has selected a test standard named "MQB Stand 3/2017". These test criteria may be stored in a database or built into the processing program. In addition, the program interface can also comprise selection boxes of vehicle information, equipment models and the like, and the information can be used as a reference for determining the test standard and can also be displayed in a final test result report.
In another aspect, an embodiment of the present invention provides a data processing apparatus for a static strength test of a knuckle. Referring to fig. 4, there is shown a block diagram of a knuckle static strength test data processing apparatus 400 according to an embodiment of the present invention. The apparatus 400 includes a module 401 and 406.
The test curve acquiring module 401 is configured to acquire a test curve according to the knuckle static strength test data, where the test data includes a force applied to the knuckle and a deformation of the knuckle under the action of the applied force.
The slope determination module 402 is configured to determine a slope of an undeformed segment of the knuckle in the test curve according to data within a specified interval of the applied force in the knuckle static strength test data, and obtain a stiffness of the knuckle according to the slope.
The yield strength auxiliary line obtaining module 403 is configured to obtain a yield strength auxiliary line according to the slope and a predetermined reference plastic deformation amount.
The plastic deformation starting point obtaining module 404 is configured to determine an intersection point of the yield strength auxiliary line and the test curve, so as to obtain a plastic deformation starting point of the steering knuckle.
The breaking strength auxiliary line obtaining module 405 is configured to obtain a breaking strength auxiliary line according to a part breaking point and a slope in the test data.
The crack deformation amount obtaining module 406 is configured to determine a deformation amount of the steering knuckle when a crack is generated according to the test curve and the breaking strength auxiliary line.
The functions implemented by the respective modules of the apparatus 400 correspond to the steps in the method described above, and therefore, for specific descriptions and beneficial technical effects of the respective modules, reference may be made to the description of the method embodiments above, and further description is omitted here.
In yet another aspect, the embodiments of the present invention provide a machine-readable storage medium storing a computer program which, when executed, performs the method described in any of the embodiments above.
It should be noted that the embodiments of the present invention can be realized by hardware, software, or a combination of software and hardware. The hardware portion may be implemented using dedicated logic; the software portions may be stored in a memory and executed by a suitable instruction execution system, such as a microprocessor or specially designed hardware. Those skilled in the art will appreciate that the apparatus and methods described above may be implemented using computer executable instructions and/or embodied in processor control code, such code being provided on a carrier medium such as a disk, CD-or DVD-ROM, programmable memory such as read only memory (firmware), or a data carrier such as an optical or electronic signal carrier, for example. The apparatus and its modules of the present invention may be implemented by hardware circuits such as very large scale integrated circuits or gate arrays, semiconductors such as logic chips, transistors, or programmable hardware devices such as field programmable gate arrays, programmable logic devices, etc., or by software executed by various types of processors, or by a combination of hardware circuits and software, e.g., firmware.
A computer program (also known as a program, software application, script, or code) can be written in any form of programming language, including compiled or interpreted languages, and it can be deployed in any form, including as a stand-alone program or as a module, component, subroutine, or other unit suitable for use in a computing environment. The computer program need not correspond to a file in a file system. A program can be stored in a portion of a file that holds other programs or data (e.g., one or more scripts stored in a markup language document), in a single file dedicated to the program in question, or in multiple coordinated files (e.g., files that store one or more modules, sub programs, or portions of code). A computer program can be deployed to be executed on one computer or on multiple computers that are located at one site or distributed across multiple sites and interconnected by a communication network.
The foregoing description of the embodiments of the invention has been presented for purposes of illustration and description, and is not intended to be exhaustive or to limit the invention to the precise forms disclosed. It will be understood by those skilled in the art that various changes may be made and equivalents may be substituted for elements thereof without departing from the scope of the invention. In addition, many modifications may be made to adapt a particular situation or material to the teachings of the invention without departing from the essential scope thereof. Therefore, it is intended that the invention not be limited to the particular embodiment disclosed as the best mode contemplated for carrying out this invention, but that the invention will include all embodiments falling within the scope of the appended claims.

Claims (10)

1. A steering knuckle static strength test data processing method is characterized by comprising the following steps:
acquiring a test curve according to knuckle static strength test data, wherein the test data comprises force applied to the knuckle and deformation of the knuckle under the action of the applied force;
determining the slope of the undeformed segment of the knuckle in the test curve according to the data in the specified interval of the applied force in the knuckle static strength test data, and acquiring the rigidity of the knuckle according to the slope;
obtaining a yield strength auxiliary line according to the slope and a predetermined reference plastic deformation;
determining the intersection point of the yield strength auxiliary line and the test curve so as to obtain the plastic deformation starting point of the steering knuckle;
acquiring a breaking strength auxiliary line according to the part breaking point and the slope in the test data; and
and determining the deformation amount of the steering knuckle when the steering knuckle cracks according to the test curve and the breaking strength auxiliary line.
2. The method of claim 1, wherein obtaining a yield strength auxiliary line based on the slope and a predetermined reference plastic deformation amount comprises:
and drawing a straight line by using the slope through a point corresponding to the reference plastic deformation amount as the yield strength auxiliary line, wherein the applied force of the point corresponding to the reference plastic deformation amount is zero.
3. The method of claim 1, wherein obtaining a breaking strength auxiliary line from the part breaking point and the slope in the test data comprises:
and drawing a straight line with the slope through the part breaking point to serve as the breaking strength auxiliary line.
4. The method according to claim 1, wherein determining the amount of deformation of the knuckle when cracked, based on the test curve and the breaking strength assist line, comprises:
and acquiring an intersection point of the breaking strength auxiliary line and an axis representing deformation in coordinate axes of the test curve, and determining the value of the deformation at the intersection point as the deformation when the steering knuckle cracks.
5. The method of claim 1, wherein the specified interval of applied force comprises a default interval or a user-entered specified interval of the applied force.
6. The method of claim 1, wherein determining the intersection of the yield strength auxiliary line and the test curve comprises:
calculating the difference value between the value of the force applied on the yield strength auxiliary line and the value of the force applied on the test curve aiming at the same deformation amount according to the sequence of the deformation amounts from small to large;
acquiring a first difference value larger than zero on the yield strength auxiliary line;
and determining a point on the test curve corresponding to the deformation according to the deformation of the point on the yield strength auxiliary line, wherein the first difference is larger than zero, and the point is used as the intersection point of the yield strength auxiliary line and the test curve.
7. The method of claim 1, further comprising:
calculating a difference between the stiffness and a standard stiffness of the knuckle; and/or
And calculating the difference value between the deformation amount of the steering knuckle when the steering knuckle cracks and the standard deformation amount of the steering knuckle when the steering knuckle cracks.
8. The method of claim 1, further comprising:
and displaying one or more of the test curve, the yield strength auxiliary line, the breaking strength auxiliary line, a point corresponding to the reference plastic deformation amount, a point corresponding to the deformation amount when the steering knuckle cracks, the plastic deformation starting point and the breaking point.
9. A data processing device for a steering knuckle static strength test is characterized by comprising:
the test curve acquisition module is used for acquiring a test curve according to the static strength test data of the steering knuckle, wherein the test data comprises force applied to the steering knuckle and deformation of the steering knuckle under the action of the applied force;
the slope determining module is used for determining the slope of the undeformed segment of the steering knuckle in the test curve according to the data in the specified interval of the applied force in the static strength test data of the steering knuckle and acquiring the rigidity of the steering knuckle according to the slope;
the yield strength auxiliary line acquisition module is used for acquiring a yield strength auxiliary line according to the slope and a predetermined reference plastic deformation amount;
the plastic deformation starting point obtaining module is used for determining the intersection point of the yield strength auxiliary line and the test curve so as to obtain the plastic deformation starting point of the steering knuckle;
the breaking strength auxiliary line obtaining module is used for obtaining a breaking strength auxiliary line according to the part breaking point and the slope in the test data; and
and the crack deformation amount acquisition module is used for determining the deformation amount of the steering knuckle when the crack is generated according to the test curve and the breaking strength auxiliary line.
10. A machine readable storage medium storing a computer program which, when executed, performs the method of any one of claims 1-8.
CN202010931193.8A 2020-09-07 2020-09-07 Steering knuckle static strength test data processing method and device and storage medium Pending CN114154284A (en)

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Application Number Priority Date Filing Date Title
CN202010931193.8A CN114154284A (en) 2020-09-07 2020-09-07 Steering knuckle static strength test data processing method and device and storage medium

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202010931193.8A CN114154284A (en) 2020-09-07 2020-09-07 Steering knuckle static strength test data processing method and device and storage medium

Publications (1)

Publication Number Publication Date
CN114154284A true CN114154284A (en) 2022-03-08

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Application Number Title Priority Date Filing Date
CN202010931193.8A Pending CN114154284A (en) 2020-09-07 2020-09-07 Steering knuckle static strength test data processing method and device and storage medium

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