Damage characteristics of composite sandwich structure subjected to underwater explosive shock wave loading
Based on the three-dimensional mechanical model of composites and Hashin failure criterion,a VUMAT subroutine defining the mechanical behavior of composites is compiled in this paper.Combined with the secondary develop-ment technology of commercial software ABAQUS and cel method,the dynamic response of composite sandwich structure under shock wave load generated by shock tube is studied.Through the comparative analysis with the experimental results,the accuracy of the numerical model is verified,and then the influence of the panel core thickness ratio of the sandwich pan-el on the deformation and energy absorption characteristics of the sandwich panel is discussed.The results show that the total energy absorbed by the composite sandwich panel decreases with the increase of the core layer thickness ratio.The energy absorbed by the core layer accounts for 65％to 80％of the total energy absorbed by the composite sandwich panel,and de-creases with the increase of the core layer thickness ratio.The increasing density of the core layer arrangement not only en-hances the ability of the structure to resist damage,but also improves the energy absorption efficiency of the sandwich structure.
万方数据
维普
