复合材料平尾接头力学性能研究

Mechanical Properties of Composite Horizontal Tail Joints

针对某平尾中央翼与外翼前梁连接接头,设计了复合材料接头试验件。根据平尾接头实际载荷工况及试验件构型,设计了特定的试验夹具,确定了静力试验方案。通过静力试验,得到了试验件在实际载荷工况下的静力极限载荷和破坏模式。并采用ABAQUS有限元软件,对中央翼前梁接头、外翼前梁接头试验件进行静力分析,有限元预测结果和试验结果吻合较好,证明了有限元模型的准确性。数值计算结果表明:接头在静力载荷工况下,孔边产生应力集中,导致孔边纤维破坏并向周围扩展,最终失去承载能力。

Aiming at the front beam joints between the central wing and the outer wing of the horizontal tail,the composite joints test pieces are designed.According to the actual load conditions of the horizontal tail joints and the configuration of the test pieces,the specific test fixtures are designed and the static test scheme is determined.Through the static test,the static limit loads and failure modes of the test pieces under the actual load conditions are obtained.The static analysis of the central wing front beam joint and the outer wing front beam joint test pieces are carried out on ABAQUS,the finite element software.The finite element prediction results are in good agreement with the test results,which proves the accuracy of the finite element model.Numerical results show that under the static load conditions,the stress concentration occurrs at the hole edge,which leads to the destruction of the fiber and expansion around the hole edge,and finally the lost of the bearing capacity.