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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.
The process of residual stress in the X-cor sandwich structure curing process is described in detail, and the result of the analysis is the residual tensile stress of Z-pin carbon fiber. Considering the effect of residual stress in the process, Z-pin is regarded as the elastic foundation beam, An improved computational model of compressive strength of X-cor sandwich structure and its compressive strength were calculated and X-cor sandwich structures with different Z-pin densities, diameters and angles were fabricated for compressive strength experiments.Experimental and model calculations The compressive strength calculation model is validated.The residual tensile stress of Z-pin increases with the increase of Z-pin diameter and implantation density, and decreases with the increase of Z-pin implantation angle.