对固体火箭发动机纤维缠绕复合材料壳体在爆破载荷作用下的失效进行了研究，基于Abaqus计算软件及二次开发，以Hashin准则作为单层失效判据建立了纤维缠绕复合材料壳体渐进失效模型；对失效单元刚度折减实现壳体爆破渐进失效的数值模拟，预测损伤类型、演化及爆破压力，并进行了相关试验验证。结果表明：壳体爆破渐进失效主要是由于中间部位的基体开裂和纤维拉断，爆破压力的有限元模拟与试验结果误差为7．1％，失效模型能较好地预测壳体爆破失效过程。
The failure of filament-wound composite case of solid rocket motor under the role of burst pressure was studied. A progressive failure mode for filament-wound composite case was proposed based on the Abaqus and user subroutine, and the Hashin criteria as failure judgement for single layer. Rigidity deterioration of failure elements was considered in the simulation to prodict the damage type, failure progression and burst pressure. And the proving experiment was carried out. Results show that the reason for failure was mainly due to matrix cracking and fiber rupture at the case center, The error of burst pressure between numerical analysis and experiment result was 7. 1%. The burst progressive failure model can exactly predict burst failure process.
参考文献
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