航天结构中,蜂窝板常采用在内部镶嵌埋件的方式使其与其他部件连接。为了分析CFRP蜂窝夹层结构板埋件集群区域面板在温度应力作用下失效的原因,进行了失稳破坏应力理论计算和数值分析,由分析结果发现是面板失稳导致了结构破坏。提出了加厚面板和局部加强两种补强方法并分析了其可行性和效率,通过对比发现局部补强的方法更加可行和高效。最后通过热真空试验,验证了局部补强方法可以提高面板稳定性,防止失稳破坏。
In aerospace structures,honeycomb panels were often connected with other components by clustered inserts.In order to analyze the reason for the failure of CFRP honeycomb sandwich panel under the effect of temperature stress, the theoretical calculation and finite element analysis of the failure stress were carried out.It was found that the instability of the panel caused the structural damage.To solve this problem,the feasibility and efficiency of two improvement measures of increasing the thickness of face sheet and local strengthening are analyzed.Through comparison experiment,it is found that the local reinforcement method is more feasible and efficient. Finally,through the thermal vacuum test,it is verified that the local reinforcement method can improve the stability of the panel and prevent the instability damage.