This article mainly studies the material damping parameters of glass fiber epoxy resin system composite pul-truded profiles.Through the production of profile samples,mechanical tests and drop hammer impact tests,the bending modulus of materials and the impact deformation under different energy states are obtained.ANSYS finite element analysis software was used to simulate and analyze the transient dynamic impact state of fiberglass/epoxy pultruded profiles.Six types of impact energy were designed to analyze the influence of material damping parameters on their mechanical response.The research results show that the material damping of fiberglass/epoxy profiles varies during different energy impact processes.The material damping reaches 0.0165 at 2 J and 4 J,but when applied to high energy impact conditions,the defromation response differs by up to 79％.The material damping parameters obtained from simulation under high energy impact gradu-ally decrease from 0.0092 to 0.0018.This is due to the influence of the internal friction mechanism of the materials,which makes it difficult to dissipate the vibration energy generated by impact,resulting in a decrease in the damping coefficient of the material.
glass fibercomposite materialmaterial dampingimpactfinite element simulation
维普
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