X-cor夹层结构压缩强度模型改进与实验验证

详细阐述了X-cor夹层结构固化工艺过程中残余应力的产生过程,分析结果为碳纤维Z-pin受残余拉应力.考虑工艺过程残余应力的影响,将Z-pin视为弹性基础上梁,提出一种X-cor夹层结构压缩强度改进计算模型,并计算其压缩强度.制作了不同Z-pin密度、直径和角度的X-cor夹层结构实验件用于压缩强度实验.实验值和模型计算值的对比验证了该压缩强度计算模型的正确性.工艺过程中Z-pin所受残余拉应力随Z-pin直径、植入密度增加而增加,随Z-pin植入角度增加而减小. 

Computational modified model and experimental verification of compressive strength of the X-cor sandwich

The generation process of residual stress during the curing process of X-cor sandwich was described,and the analytical results indicate that carbon fiber Z-pins are subject to residual tensile stress.In consideration of the effects of residual stress,Z-pins were treated as beams upon an elastic foundation,then a sort of compressive strength computational modified model of X-cor sandwich was proposed and its compressive strength was computed.The X-cor sandwich samples of different density,diameter and angle of Z-pins were made for compressive strength experiments.Through contrast between experimental and computational results the computational model was verified.The residual stress increases as the Z-pin's diameter and density become bigger,or decreases as the Z-pin's angle increases.