PBX断裂力学行为研究进展

Researoh Progress on Fracture Mechanical Behaviors of PBX

从常用实验方法、细观断裂模式、宏观断裂力学以及动态断裂方面,概述了近年来国内外关于PBX断裂力学行为的研究状况;介绍了PBX宏观和细观断裂特征及表征手段;阐述了细观结构、力学特性、温度和加载率对PBX断裂行为的影响。指出应开展PBX细观微裂纹萌生和扩展、宏观起裂机理研究,及动态加载下PBX裂纹扩展行为研究,建立适合PBX材料特性的复合型断裂准则。附参考文献51篇。

In terms of the commonly used experimental methods, mesoscopic fracture modes, macroscopic fracture mechan-ics and dynamical fracture, the research works on the fracture mechanical behaviors of PBX at home and abroad were re-viewed. The macroscopic and mesoscopic-fracture features and characterization methods of PBX were introduced. The effects of mesostructure,mechanical feature, temperature and loading rate on the fracture behavior of PBX were discussed. It is pointed out that the research on PBX mesocrack initiation and extension, macroscopic fracture initiation mechanism and the crack extension behavior under dynamical loading of PBX should be carried out , and the composite fracture criterion fit-ted the characteristics of PBX should be established. With 51 references.