基于ACP的碳纤维复合材料气瓶渐进损伤与爆破压力预测

Progressive Damage and Bursting Pressure Prediction of Composite Carbon Fiber Cylinder Based on ACP

碳纤维复合材料气瓶失效与爆破压力预测技术呈现出越来越多样化的趋势。基于ANSYS ACP建立了T800碳纤维复合材料气瓶理论模型,采用Camanho P P提出的刚度退化方案,对2.4L复合材料气瓶进行了渐进失效和爆破压力的预测,详细阐述了模型的构建和结构损伤,重点分析了含基体开裂、纤维断裂和内胆破裂缺陷下不同缠绕层的气瓶应力分布和损伤过程。最后通过水压爆破试验得到实验结果,该结果与理论值吻合较好。

The prediction techniques for progressive failure and bursting pressure of the cylinder made of carbon fiber composites show a trend towards greater diversity.In this paper,a theoretical model of T800 carbon fiber composite gas cylinder was established based on ANSYS ACP.Having the stiffness degradation scheme proposed by Camanho P P adopted to predict a 2.4L cylinder’s progressive failure and bursting pressure was implemented,including the description of the model’s construction and structural damage,and the analysis of stress and damage distribution of gas cylinder with different fiber layers under the conditions of matrix cracking,fiber fracture and inner tank fracture.The hydraulic bursting test showed that,the experimental results are in good agreement with the theoretical values.