摘要
基于线弹性断裂理论,提出了一个适合复合固体推进剂的脱湿微裂纹损伤发展方程,通过部分单向定速拉伸试验数据拟合确定其主要的细观参数,从而得到了复合固体推进剂在细观水平上完整且封闭的本构方程组。该模型不仅得到了单向拉伸试验结果的验证,而且在较大范围内可以有效地预测不同应变率下的单轴定速拉伸力学性能。
Based on linear elastic fracture theory, a damage evolution equation for composite soild propellant under uniaxial tension is derived. Main mecrosopic of material are determined through fittin the experiment data of constant rate tension. Then, the integrate constitutive equations found is close to microlevel. The consistency between theory and experiment is pretty good, and the rationality of the model is confirmed in the very large scope of strain and strain rate.
出处
《固体火箭技术》
EI
CAS
CSCD
北大核心
2003年第2期33-37,共5页
Journal of Solid Rocket Technology
基金
国家自然科学基金资助项目
批准号50105021。