Experimental Study On Mechanical Properties Of HBMs/EP Composite Sandwich Structure

Hollow glass microballon is a light, smooth surface, a hollow small spherical particles, usually used as fillers for composites, joining the microballon can reduce the matrix density, can improve the material strength, stiffness. The hollow glass microballon and preparation of polyurethane foam plastics are widely used in aviation, aerospace and other fields. Hollow glass microballon filled epoxy resin composite materials in recent years is a new composite material, the quasi static tensile compression mechanical properties mechanical properties have been adequately studied, its excellent specific strength stiffness makes it in the future will be more and more widely applied.This article from the low velocity impact and three point bending test for the preparation of test specimens studied, prepared three kinds of specimens, six groups of samples. The first group of sample is used to determine the same filling ratio (15%) of hollow glass microballon filled epoxy resin composite material impact through critical mass; second groups of specimen for different filling ratio (0%,5%,10%,15%) of hollow glass microballon filled epoxy resin composite material impact test; third groups of samples used for determining the filling ratio (the same15%) of hollow glass microballon filled epoxy resin composite sandwich plate impact through critical mass; fourth groups of specimen for different filling ratio (0%,5%,10%,15%) of hollow glass microballon filled epoxy resin composite sandwich plate impact test; the remaining two groups used for hollow glass microballon filled epoxy resin composite sandwich beam three point bending experiment.The hollow glass microballon filled epoxy resin composite material impact test shows that, the filling ratio of5%,10%of the impact specimen impact performance is better than the filling ratio of0%and15%of the impact specimen. As for the hollow glass microballon filled epoxy resin composite sandwich plate material impact test shows that, the filling ratio of15%of the impact specimen impact resistance is the worst. Hollow glass microballon filled epoxy resin composite material sandwich three-point bending tests indicate, filling ratio from0to15%within the scope of its mechanical properties decreased slowly. Based on the experimental phenomenon is analyzed by finite element method numerical simulation, and are compared with the experimental results.