A fabric preform initial shape optimization cutting method based on finite element simulation

By optimizing the initial shape cutting method of the fabric preform through finite element simulation, the problem of fabric forming defects in composite material manufacturing was solved, the optimized design of fabric shape was realized, and the quality and performance of composite materials were improved.

CN120087147BActive Publication Date: 2025-11-21CHINA AIRPLANT STRENGTH RES INST
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Patent Information

Application Number
CN202510237020.9
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2025-03-01
Publication Date
2025-11-21
Estimated Expiration
2045-03-01

AI Technical Summary

Technical Problem

Existing technologies are unable to effectively suppress manufacturing defects during the fabric forming stage of composite material manufacturing, such as fabric wrinkles, fiber buckling, and fiber breakage, resulting in poor mechanical properties and quality consistency of the finished composite material.

Method used

A finite element simulation-based method for optimizing the initial shape of fabric preforms was adopted. By acquiring the initial configuration data of two-dimensional fiber fabric, constructing an orthogonal coordinate system, calculating the stress component increment, setting the radial distance limit of the fabric boundary control points, performing parametric cutting, simulating the fabric strain distribution, evaluating the severity of forming defects, and finally performing optimization algorithm calculations in Isight software to obtain the optimal solution.

Benefits of technology

The optimal shape solution with the minimum fabric forming defects is obtained by numerical simulation calculation, which avoids repeated trial and error in physical experiments, saves process design time and cost, and achieves optimized fabric shape design by saving material usage.

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Abstract

The application belongs to the field of composite manufacturing process simulation and optimization design, and particularly relates to a kind of initial shape optimization cutting method of fabric preform based on finite element simulation, parameterized simulation and evaluation model of fabric shape control loading, and the maximum value of the absolute value of the fiber main direction compression strain is output;The polar coordinates of the control points in the simulation and evaluation model are initialized, and the value range of the polar coordinates is determined;Then, based on the design target, set the optimization target, constraint condition of the simulation and evaluation model in Isight software, and select the optimization algorithm to run calculation until the optimal solution is obtained. The optimal solution of the fabric shape corresponding to the minimum fabric forming defect characterization quantity can be obtained through numerical simulation calculation, which avoids repeated trial and error based on a large number of fabric forming physical tests, and can effectively save the process design time and cost;With the fabric shape as the optimization design variable, the material usage can be saved by setting the maximum area constraint of the fabric.
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