CAJ | 학술논문

通过实验较系统地研究了Kevlar纤维增强复合材料的动态压缩力学性能.实验结果表明，在冲击压缩载荷作用下Kevlar纤维增强复合材料有明显的损伤软化现象和应变率效应.针对Kevlar纤维增强复合材料动态应力应变实验曲线，提出了含损伤的率相关动态本构方程.由于所引入的损伤量反映了Kevlar纤维增强复合材料内部基体开裂、脱层、纤维断裂等多种破坏模式的总体效果，因此所提出的本构方程形式相对说来比较简便并易于嵌入目前有关冲击力学的有限元或有限差分程序，有一定的工程应用价值.
통과실험교계통지연구료Kevlar섬유증강복합재료적동태압축역학성능.실험결과표명，재충격압축재하작용하Kevlar섬유증강복합재료유명현적손상연화현상화응변솔효응.침대Kevlar섬유증강복합재료동태응력응변실험곡선，제출료함손상적솔상관동태본구방정.유우소인입적손상량반영료Kevlar섬유증강복합재료내부기체개렬、탈층、섬유단렬등다충파배모식적총체효과，인차소제출적본구방정형식상대설래비교간편병역우감입목전유관충격역학적유한원혹유한차분정서，유일정적공정응용개치.
The dynamic compression properties of Kevlar fiber-rainforcedcomposite are investigated by SHPB. The experimental results show that the material has remarkable rate-hardening and damagesoftening effects. A new constitutive model that includes the rate-dependent and damage-softeningeffects is proposed. Since the intrinsic variable describing the damage behavior of Kevlar composite involves the effects of matrix fracture, delamination and fiber fracture, the constitutive model proposed here is valuble. It is relatively simple and easy to be implemented into finite element/finite difference dynamic programs.