某国产复合材料层压板压缩稳定性研究

Abstract

分别用工程算法和有限元软件MSC.Patran2008/Nastran2008,分析了受压缩载荷作用下某国产复合材料层压板四边简支约束下的失稳情况，并展开了四边简支情况下的复合材料层压板压缩稳定性试验。试验表明在加载的初始阶段试件发生的局部屈曲，层压板后屈曲承载能力较大；研究了层压板的破坏模式。工程理论计算、有限元分析、试验结果进行对比，发现三种方式得到层压板的一阶屈曲载荷接近，说明了数值模型的合理及有限元计算可以为复合材料结构的研究提供一定的参考。 The mis-stability condition of simply supported domestic composite lamination at four sides af-fected by compressive load is analyzed by engineering algorithm and finite element software MSC. Patran 2008/Nastran 2008, respectively. And a compression stability test of simply supported composite laminates on four sides is conducted. The tests show a local buckling during the initial phase of loading; the post-buckling load-bearing capability is large. The failure mode of the laminate was studied. The contrast of engineering theory calculation, finite element analysis, and the test results shows that the first-order buckling loads from three methods are close, which indicates the finite element model is rational and the finite element calculation could provide reference to the research of composite structure.