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含能材料  2015 

PBX炸药含裂纹扩展损伤的粘塑性本构关系

DOI: 10.11943/j.issn.1006-9941.2015.10.015

Keywords: 微裂纹扩展 高聚物粘结炸药(PBX) 损伤 本构关系

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Abstract:

为描述高聚物粘结炸药(PBX)的动态力学性能, 将炸药内由微裂纹扩展引起的细观损伤, 耦合到宏观粘塑性本构方程中, 建立了含微裂纹扩展损伤的粘塑性本构关系。针对某PBX炸药, 开展了单轴压缩及断裂性能实验, 研究了材料本构参数及本构关系计算算法, 嵌入到ABAQUS软件中, 数值模拟了该PBX炸药不同应变率条件下的力学行为。与实验结果对比表明, 含裂纹扩展损伤的粘塑性本构关系能够表征PBX炸药动态条件下力学性能变化过程, 可用于冲击环境下炸药损伤演化分析研究

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