复合材料整体加筋板的七点弯曲试验与数值分析

Numerical and Experimental Analysis on Seven-Point Bending Test of Integrated Composite Panels

研究了复合材料整体加筋板七点弯曲试验的失效表征问题。在有限元分析的基础上,设计了七点弯曲试件和试验夹具。在试验研究和有限元计算的基础上,对七点弯曲试验的失效机理进行了讨论分析。通过对一系列七点弯曲试验模型的分析,获得了复合材料加筋板典型部位的失效包线,并给出了失效表征方法。最后给出了指导复合材料整体加筋板结构细节设计的建议。

The failure characterization is studied for the sevenpoint bending tests of integrated composite panels.The specimen and fixture of seven-point bending test are designed based on the finite element analysis.Furthermore,the failure mechanisms of the specimen are discussed based on the test results and the finite element simulations.The failure envelop of the typical structural details is obtained and the method is presented for the failure characterization of the specimen by numerically simulating a series of seven-point bending test models.Finally,some suggestions are proposed for the detailed design of integrated stiffened composite panels.