Impact Behavior Analysis and Failure Mode Comparison of Glass Fiber ( GF)/Polydicyclopentadiene (PDCPD) Thermosetting Composite for Automobile Bottom Protection Plate

Abstract

A glass fiber(GF)/polydicyclopentadiene(PDCPD) composite impact simulation model was established based on LS-DYNA(the finite element analysis software peroduced by Livermore Software Technology Corporation) simulation. An optimal ply thickness of the composite GF/PDCPD was determined as 3.0 mm, and thus the final intrusion depth was controlled within 8.8 mm, meeting the performance standards for battery electric vehicle protection materials. A comparative analysis of failure modes during impacts was conducted for composites GF/PDCPD, GF/polypropylene(PP) and GF/polyamide(PA). The results indicated that GF/PDCPD exhibited compressive failure modes and ductile fractures, resulting in smaller damage areas. In contrast, GF/PP and GF/PA showed fiber fracture failures, leading to larger damage areas. The molding process and impact resistance of GF/PDCPD were investigated. By comparing the impact performance of GF/PDCPD with that of GF/PP and GF/PA, it was concluded that GF/PDCPD demonstrated superior performance and better alignment with the performance standards of battery electric vehicle protective materials. The predictability and accuracy of LS-DYNA simulation was verified, providing a theoretical foundation for further in-depth research.

Keywords

thermosetting composite / PDCPD / GF/PP / GF/PA / LS-DYNA simulation / impact performance / MAT54

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