State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Materials Science and Engineering, Donghua University, Shanghai 201620, China.
Molecules. 2022 Oct 29;27(21):7361. doi: 10.3390/molecules27217361.
This study optimized the laminate structure of a composite cylinder under the constraint of minimum layup thickness. Based on the progressive damage theory, a finite element model of the cylinder was established, and the NOL ring tensile test was used to verify the accuracy of the damage theory. The winding angle, the number of layers, and the helical/hoop ratio (the stacking sequence) were selected as the optimization factors, and the burst pressure value was used to evaluate the quality of the laminate structure. Then the orthogonal experiments were designed by RSM. Combined with FEA, the function model of the burst pressure of the gas cylinder and each optimization factor was established to obtain the optimal layering scheme, satisfying the minimum burst pressure. In addition, finite element analysis was used to verify the optimal scheme, demonstrating that the error of the burst pressure predicted by the quadratic model established by the response surface design was not more than 5%. This study provides a faster and more efficient optimization method for the optimization design of composite gas cylinder layers.
本研究在最小铺层厚度的约束下，对复合材料筒体的层合结构进行了优化。基于渐进损伤理论，建立了筒体的有限元模型，并采用 NOL 环拉伸试验验证了损伤理论的准确性。将缠绕角、层数和螺旋/环向比（铺层顺序）作为优化因素，以爆破压力值作为评估层合结构质量的指标。然后采用 RSM 设计正交试验。结合有限元分析，建立了气瓶爆破压力与各优化因素的函数模型，得到了满足最小爆破压力的最优铺层方案。此外，还通过有限元分析验证了最优方案，结果表明，响应面设计建立的二次模型预测爆破压力的误差不超过 5%。本研究为复合材料气瓶层合结构的优化设计提供了一种更快、更高效的优化方法。
