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后微屈曲是单向纤维复合材料和层状复合材料压缩破坏过程的基本特征。结合Kevlar 49增强648/BF_3·400(脆性环氧)和EP(韧性环氧)基复合材料对后微屈曲的折带扩展进行理论分析和实验研究。理论预测与实验结果达到定性、定量符合,实验展现出扩展折带模式的微屈曲特征。
Post-flexion is the basic feature of the compression failure process of unidirectional fiber composites and layered composites. Combined with Kevlar 49 enhanced 648 / BF_3 · 400 (brittle epoxy) and EP (ductile epoxy) matrix composites, the theoretical analysis and experimental research on the flexural extension of the post-flexion were carried out. Theoretical predictions and experimental results achieve qualitative and quantitative conformance, and experimental results show the micro-buckling characteristics of the extended break-out mode.