Modeling high velocity hailstone impact onto composite material panel
WANG Yang1，LI Yu-long2
1.Stress Department of Shanghai Aircraft Design and Research Institute, Shanghai 201210, China;2.School of Aeronautics, Northwestern Polytechnical University, Xi’an 710072, China
Abstract：The impact of hailstones on aircraft with cruise velocity is probable to cause damage or delamination in composite structures. In order to analyze hail resistant behavior of composite materials, the numerical simulation on the process of hail impacting composite panels were carried out by using finite element analysis software ANSYS/LS-DYNA. The Smooth Particle Hydrodynamic (SPH) approach was used to capture the highly complex and non-linear behavior of the hailstone impacting on a rigid target. Then the validated hail model was introduced into modeling hailstone impact on composite structures, in which the delamination was also considered using cohesive zone methodology(CZM). Good agreement can be stated between simulation and experiment. Based on this, the paper analyzed the influence of different parameters.
2015, Vol. 34 
