考虑渐进损伤的纤维缠绕复合材料圆筒铺层顺序优化设计

Optional design of stacking sequence of filament-wound compositecylinder considering progressive damage

针对内压载荷作用下复合材料圆筒,基于复合材料渐进损伤分析方法和遗传算法,建立了复合材料圆筒铺层顺序优化设计方法。复合材料渐进损伤起始准则采用LaCR准则,采用线性软化准则来模拟损伤的演化,基于Bazant提出的裂纹带模型来缓解网格依赖性,运用粘性正则化改善有限元模型的收敛性。渐进损伤分析基于Abaqus软件平台实现,优化算法基于Matlab软件实现,采用Python语言编写脚本进行两个软件平台的数据交换,搭建了基于Matlab和Abaqus软件平台的复合材料圆筒铺层顺序的优化设计平台。针对三种典型承载工况对缠绕复合材料圆筒进行了铺层优化设计。结果表明,无约束条件下爆破压强和考虑工艺约束下的爆破压强均高于传统铺层[±55°]4所对应的爆破压强分别高出6.5%和3.7%,说明本文的优化设计结果可以提高纤维缠绕复合材料圆筒的爆破压强。

An optimized design method was proposed to design stacking sequence of composite cylinder based on composite progressive damage method and the genetic algorithm.The LaCR criterion and the linear softening criterion were used for damage initiation and damage evolution respectively.To alleviate the mesh dependence,the crack zone model proposed by Bazant was adopted and viscosity regularization was used to improve the convergence of the finite element model.The optimization algorithm was implemented based on the Matlab software platform and the progressive damage analysis was based on the Abaqus software platform.A script was written in Python for data exchange between the two software platforms,and an optimization design platform of composite cylinder stacking sequence was built based on Matlab and Abaqus software platform.Stacking sequence designs were carried out for three typical load-bearing working constrains.The results show the following points:asymmetric winding sequence yield the best burst pressure for unconstrained condition and manufacturing constrains considering progressive failure analyses,the burst pressures of both are bigger than that one of traditional stacking sequence[±55°]4 and are 6.5%and 3.7 higher,respectively.The present method can increase burst pressure of composite cylinder to a certain exten.