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CN-121983192-A - Composite impact damage simulation modeling method, system, equipment and storage medium

CN121983192ACN 121983192 ACN121983192 ACN 121983192ACN-121983192-A

Abstract

The invention discloses a composite material impact damage simulation modeling method, a system, equipment and a storage medium, wherein the method comprises the steps of constructing a three-dimensional geometric model of a composite material according to microscopic characterization, modeling by adopting different finite element unit types according to impact angles and material characteristics, giving corresponding material directions to each layer according to layer angles in a simulation model so as to define orthotropic mechanical properties of each layer, carrying out explicit dynamics analysis on the assembled simulation model, simulating an impact process by adopting an explicit integral algorithm, obtaining simulation data for simulating the impact process, and carrying out damage evaluation. The method has the remarkable effects that high-precision simulation and effective evaluation of impact damage behaviors of the composite material pipe are realized, and the method is suitable for damage mode prediction, dynamic mechanical response analysis and damage evaluation under various impact angles and energy conditions.

Inventors

  • TANG HAIBIN
  • CAO ZHIQIANG
  • CHEN ZHANGXING
  • GU MINGFEI

Assignees

  • 南京理工大学

Dates

Publication Date
20260505
Application Date
20251224

Claims (10)

  1. 1. The composite material impact damage simulation modeling method is characterized by comprising the following steps of: Step 1, constructing a three-dimensional geometric model of the composite material according to microscopic characterization; Step 2, modeling by adopting different finite element unit types according to the impact angle and the material characteristics; Step 3, in the simulation model constructed in the step 2, corresponding material directions are given to each layer according to the layer angle so as to define the orthotropic mechanical properties of the layers; step4, performing explicit dynamics analysis on the assembled simulation model, and simulating an impact process by adopting an explicit integral algorithm; and step 5, obtaining simulation data of the simulation impact process and performing damage evaluation.
  2. 2. The method for modeling impact damage of composite material according to claim 1, wherein the process of constructing the three-dimensional geometric model of composite material in step 1 comprises: modeling by adopting a three-layer composite material structure, wherein the layering angles of the three-dimensional geometric model are sequentially set to be 0 degree, 90 degrees and 0 degree; and the three-layer structure in the three-dimensional geometric model is independently endowed with the material directions and material constants of different layers, so that the 0-degree layer is subjected to axial impact and the 90-degree layer is subjected to circumferential tangential stress.
  3. 3. The method for simulating and modeling impact damage of composite material according to claim 2, wherein the boundary conditions and contact of the three-dimensional geometric model are set as follows, namely, the steel impact body and the pressing block are both set as rigid bodies, and surface-surface contact is defined between the impact body and the composite material.
  4. 4. The method for modeling impact damage of composite material according to claim 1, wherein the modeling process performed by using different finite element unit types in the step 2 is as follows: for the impact working conditions of 0 DEG and 30 DEG, modeling is carried out by adopting a Tshall unit; for the 90 ° impact condition, modeling is performed using Shell units, and a plurality of integration points are distributed in the thickness direction.
  5. 5. The method for modeling impact damage of composite material according to claim 4, wherein the modeling process for the impact working conditions of 0 DEG and 30 DEG is as follows: in the 0 degree impact configuration, steel stoppers were added to both ends of the tube to inhibit bouncing and provide boundary constraints consistent with the experiment; In the 30 ° impact configuration, the composite tube, compacts and rigid walls were rotated 30 ° to simulate an experimental ramp and impart the appropriate coefficient of friction between the tube and compacts.
  6. 6. The method for simulating the impact damage of the composite material according to claim 1, wherein the step of performing dynamics analysis on the assembled simulation model in the step 4 and simulating the impact process by using an explicit integration algorithm comprises the following steps: Carrying out explicit dynamics analysis on the assembled simulation model by using commercial software, simulating an impact process by adopting an explicit integral algorithm, applying a gravity load, endowing an impact body with initial speed, controlling solving time and stability, and setting output impact counter force and interlayer failure data; synchronously extracting impact counter-force data and interlayer failure history variables; And generating a simulation output file.
  7. 7. The method for simulating the impact damage of the composite material according to claim 6, wherein the step of obtaining the simulation data of the simulated impact process and performing the damage evaluation in the step 5 comprises the steps of: reading impact reaction force original data from a simulation output file, and performing time sequence reading, smoothing, peak value identification, load rate calculation and unloading stage envelope extraction to form a quantitative impact reaction force index; Extracting interlayer failure history variables of different integral points, dividing the interlayer failure history variables into an inner layer damage data set and an outer layer damage data set according to the thickness direction, screening out effective damage points through point-by-point scanning and threshold judgment of the failure variables of all the integral points, and generating an interlayer damage distribution map; and forming a data set by using quantization indexes under different impact energies, and performing trend comparison based on the energy levels to finish the internal verification of the prediction precision, stability and sensitivity of the simulation model.
  8. 8. A composite impact damage simulation modeling system, comprising: The three-dimensional geometric model construction module is used for constructing a three-dimensional geometric model of the composite material according to microscopic characterization; The simulation model construction module is used for modeling by adopting different finite element unit types according to the impact angle and the material characteristics; The material direction giving module is used for giving corresponding material directions to each layer according to the layer angle in the constructed simulation model so as to define the orthotropic mechanical properties of the material direction giving module; The dynamics solving and simulation data extracting module is used for carrying out explicit dynamics analysis on the assembled simulation model and simulating an impact process by adopting an explicit integral algorithm; and the data analysis and damage evaluation film is used for acquiring simulation data of the simulated impact process and performing damage evaluation.
  9. 9. A computer device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, the processor implementing the composite impact damage simulation modeling method of any of claims 1 to 7 when the program is executed.
  10. 10. A computer readable storage medium having stored thereon a computer program, wherein the computer program when executed by a processor implements the composite impact damage simulation modeling method of any of claims 1 to 7.

Description

Composite impact damage simulation modeling method, system, equipment and storage medium Technical Field The invention relates to the technical field of composite material structure simulation, in particular to a composite material impact damage simulation modeling method, a system, equipment and a storage medium. Background The fiber reinforced polymer composite material is widely applied in the fields of electric power, aerospace and the like due to the excellent mechanical property and high material utilization rate. However, the material has poor shock resistance in the transverse direction and the out-of-plane direction, and is easy to damage due to low-energy impact such as collision, drop and the like in the transportation, installation and use processes, thereby affecting the service safety of the material. At present, a general shell unit or a physical unit is adopted for simulating the impact behavior of the composite material, so that complex responses such as local crushing, layering, rebound and the like under different impact angles are difficult to accurately simulate, and particularly, a differential unit modeling strategy for axial, oblique and radial impact is lacking, and a set of evaluation flow for systematic analysis based on simulation data is adopted, so that the accuracy and reliability of a simulation result are difficult to guarantee. Therefore, there is a need to design a method, system, device and storage medium for high-precision simulation modeling and result analysis for damage behavior of composite material pipe under low-speed impact. Disclosure of Invention Aiming at the defects of the prior art, the invention aims to provide a method, a system, equipment and a storage medium for simulating and modeling impact damage of a composite material, which realize high-precision simulation and effective evaluation of the impact damage behavior of a composite material pipe by combining unit type selection, multi-layer material direction definition, multi-integration point setting and systematic simulation data extraction and analysis flow under different impact angles. In order to achieve the above purpose, the invention adopts the following technical scheme: In a first aspect, the invention provides a composite impact damage simulation modeling method, which is characterized by comprising the following steps: Step 1, constructing a three-dimensional geometric model of the composite material according to microscopic characterization; Step 2, modeling by adopting different finite element unit types according to the impact angle and the material characteristics; Step 3, in the simulation model constructed in the step 2, corresponding material directions are given to each layer according to the layer angle so as to define the orthotropic mechanical properties of the layers; step4, performing explicit dynamics analysis on the assembled simulation model, and simulating an impact process by adopting an explicit integral algorithm; and step 5, obtaining simulation data of the simulation impact process and performing damage evaluation. Further, the process of constructing the three-dimensional geometric model of the composite material in the step 1 includes: modeling by adopting a three-layer composite material structure, wherein the layering angles of the three-dimensional geometric model are sequentially set to be 0 degree, 90 degrees and 0 degree; and the three-layer structure in the three-dimensional geometric model is independently endowed with the material directions and material constants of different layers, so that the 0-degree layer is subjected to axial impact and the 90-degree layer is subjected to circumferential tangential stress. Furthermore, the boundary conditions and contact of the three-dimensional geometric model are set as follows, namely, the steel impact body and the pressing block are both set as rigid bodies, and surface-surface contact is defined between the impact body and the composite material. Further, the modeling process performed by using different finite element unit types in step 2 is as follows: for the impact working conditions of 0 DEG and 30 DEG, modeling is carried out by adopting a Tshall unit; for the 90 ° impact condition, modeling is performed using Shell units, and a plurality of integration points are distributed in the thickness direction. Further, the modeling process for 0 ° and 30 ° impact conditions is as follows: in the 0 degree impact configuration, steel stoppers were added to both ends of the tube to inhibit bouncing and provide boundary constraints consistent with the experiment; In the 30 ° impact configuration, the composite tube, compacts and rigid walls were rotated 30 ° to simulate an experimental ramp and impart the appropriate coefficient of friction between the tube and compacts. Further, the step 4 of dynamically analyzing the assembled simulation model and simulating the impact process by using an explicit integration algorit