基于SPH方法的鸟撞复合材料层合板数值分析

采用光滑粒子流体动力学法(SPH)耦合有限元法对复合材料层合板受鸟撞击的过程进行了数值模拟。复合材料层合板采用渐进损伤模型,鸟体采用SPH粒子建立模型,利用ANSYS/LS-DYNA显示动力分析模块分析了复合材料层合板结构非线性接触。分析了鸟撞层合板过程中鸟体损伤及层合板单层纤维失效和基体失效情况,分析了鸟体的入射角方向及层合板采用不同铺层时对层合板吸能效果的影响。计算结果表明,合理设计层合板铺层可以提高层合板的吸能效果。

SPH-BASED NUMERCIAL SIMULATION OF COMPOSITE MATERIAL UNDER BIRD IMPACT

In this paper,high-velocity impacts for application to the bird-strike problem of composite laminates were studied.The progressive damage model is used to simulate composite laminates,in order to study the deformation and damage of composite laminates subjected to the bird strike.The process of composite laminates by bird impact is simulated through the smoothed particle hydrodynamics method (SPH) coupled explicit finite element method.This paper analyses the damage of bird when it hits the composite laminates.The progressive damage characteristics of a unidirectional composite laminates,and the damage of fiber and matrix of every layer in the composite laminates.The influence of absorbing energy of laminates is studied at the direction of different incident angle of bird.The analysis results show that the laminates layers' orientations should have corresponding change in order to improve the energy absorption of composite laminates.