应变率对复合材料壳体外压性能的影响

摘要

对φ200 mm的复合材料壳体的应变率相关性进行了试验研究.分别对准静态和应变率约为0.105s-1的动态情况进行了试验.在动态加载过程中,采用了航天四院设计的脉冲压力发生器和外压试验装置,该装置可在10～ 200 ms将结构件加载至破坏.试验结果表明:复合材料壳体具有比较明显的应变率相关性,与准静态加载条件相比,当应变率达到0.105 s-1时,φ200 mm的复合材料壳体其外压承载能力可以提高1.55倍左右.%An experimental investigation of the strain rate relativity of φ200 mm composite case was conducted. Quasi-static status and dynamic status of 0. 105 s -1 strain rate were tested respectively. A pulse-pressure generator and external-pressure loading equipment designed by the 4th Academy of CASC which can load and then destroy the specimen within 10 ~ 200 ms were used in the dynamic loading process. The results show that composite case exhibits obvious strain rate relativity. Compared with the quasi-static status, the destroyed external-pressure of the φ200 mm composite case raised about 1. 55 times when the strain rate was 0.105 s-1.