简介:为解决复合材料接头强度分析中由于接触造成的收敛困难问题,自定义了具有特殊本构关系的粘接元用来模拟接触,该单元只能传递压力而不能传递拉力。自定义的粘接元被置于两接触对之间用来传递接触压力,从而保证了接触体之间在接触面上的变形协调关系。同时,建立了复合材料单钉接头的三维累积损伤有限元模型。在文献[1,5]的材料性能退化模型基础上,对纤维及基体压缩破坏的刚度退化模式做了改进,并利用自定义粘接元接触技术及改进后的刚度退化方法对模型进行了有限元模拟。最后,进行了四组相应试验件的试验验证,试验结果和模拟结果吻合较好,证明了自定义粘接元接触技术,以及本文中模型和算法的有效性。
简介:·学术探讨·直升机操纵范围研究·····,······································,························4·····,··········……张雅铭〔1一l)降低旋翼激振力的动力学优化设计研究综述······································……郭俊贤向锦武张晓谷(l一7)热塑性与热固性复合材料抗坠吸能地板的比较与分析·······························4··············……荚淑萍(l一14)用容量瓶测量气动元件微小漏气量························,···········································……杨振祥(l一23)无人驾驶直升机外形设讨一的一些研究···············一···················································一吕春雷‘I一28)直一9直升机主液压助力器稳定性分析···········································...