X-cor夹层结构压缩强度模型改进与实验验证  

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

作　　者：党旭丹[1] 肖军[1] 谭永刚[1] 李勇[1] 原永虎[1] 

机构地区：[1]南京航空航天大学材料科学与技术学院,南京210016

出　　处：《航空动力学报》2009年第12期2802-2807,共6页Journal of Aerospace Power

基　　金：科研计划(JPPT-1446)

摘　　要：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 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 ...

关 键 词：X-COR夹层结构 压缩强度 Z-PIN 残余应力 计算模型 

分 类 号：TB302.3[一般工业技术—材料科学与工程]