简单拉伸下高聚物粘结炸药的损伤测量及损伤演化研究

DAMAGE EVOLUTION OF PBX UNDER SIMPLE TENSION

在简单拉伸载荷下高聚物粘结炸药呈现出非线性力学行为 ,这种非线性特性是由于材料内部损伤的演化和发展所致。采用弹性模量下降法测量了高聚物粘结炸药的损伤变量 ,据此建立了这类材料的损伤演化方程和本构关系 ,理论结果与实验结果吻合 ,并进一步讨论了高聚物粘结炸药的损伤度量方法和损伤特性。

The nonlinearity of PBX mechanical behaviors under simple tension was treated as the result of damage evolution,and damage parameter was measured experimentally.A damage evolution equation was derived.The prediction from the constitutive relation including elastic damage effect agrees well with the experimental results.Damage character and its measurement method were also discussed.