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Abstract

Impact analysis of 3D braided composites and laminated plane woven fabric composites was performed using the elasto-plastic constitutive law to describe the nonlinear, anisotropic and asymmetric properties of fiber-reinforced composites. As for the yield criterion, the modified Drucker—Prager yield criterion was utilized to represent the anisotropic and asymmetric properties, while the anisotropic hardening was described based on the kinematic hardening with the anisotropic evolution of the back-stress. Experiments to obtain the material parameters of the proposed constitutive law were also carried out based on uni-axial tension and compression tests for fiber-reinforced composites. Then, the proposed constitutive law was implemented into a finite element code and was verified by comparing the finite element simulation of the impact tests with experiments. In addition, impact performance of the braided composites and laminated composites was also compared with each other.

Keywords

modified Drucker—Prager yield criterion elasto-plastic constitutive law anisotropic back-stress evolution rule 3D braided composites low velocity impact.

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References

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Impact Analysis of Fiber-reinforced Composites Based on Elasto-plastic Constitutive Law

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