The ffects of different laying angles on impact resistance and damage types of woven carbon fibre-reinforced polymer(CFRP)laminates were studied.The drop harmmer impact test and simulation analysis of woven CFRP lamin...The ffects of different laying angles on impact resistance and damage types of woven carbon fibre-reinforced polymer(CFRP)laminates were studied.The drop harmmer impact test and simulation analysis of woven CFRP laminates at four different velocities were carried out by means of the combination of experiment and explicit finite element analysis.The effect of impact velocity on damage pattern and fracture of woven CFRP laminates with eight layers and four laying angles(0°,15°,30°,and 45°)was studied by drop weight impact test,and the damage area of woven CFRP larminates with different laying angles was measured by ultrasonic nondestructive testing method.A user-defined material model was developed based on LS-DYNA to simulate the impact behavior of woven CFRP laminates.A finite element simulation model was established to effectively predict the complex damage evolution of woven CFRP laminates under low-speed impact loading.Its effectiveness was verified by impact response and damage crack pattern.The energy absorption and impact force of the laminated plate increase gradually from 0°to 45°in the laying angle of woven fabric.With the increase of laying angle from 0°to 459,the length of fracture crack and the damage area increase.The developed model can accurately predict the impact properties of the composites.展开更多
基金the Jilin Scientific and Technological Development Program(No.20170101130JC)the National Natural Science Foundation of China(Nos.51775227 and 51375201)。
文摘The ffects of different laying angles on impact resistance and damage types of woven carbon fibre-reinforced polymer(CFRP)laminates were studied.The drop harmmer impact test and simulation analysis of woven CFRP laminates at four different velocities were carried out by means of the combination of experiment and explicit finite element analysis.The effect of impact velocity on damage pattern and fracture of woven CFRP laminates with eight layers and four laying angles(0°,15°,30°,and 45°)was studied by drop weight impact test,and the damage area of woven CFRP larminates with different laying angles was measured by ultrasonic nondestructive testing method.A user-defined material model was developed based on LS-DYNA to simulate the impact behavior of woven CFRP laminates.A finite element simulation model was established to effectively predict the complex damage evolution of woven CFRP laminates under low-speed impact loading.Its effectiveness was verified by impact response and damage crack pattern.The energy absorption and impact force of the laminated plate increase gradually from 0°to 45°in the laying angle of woven fabric.With the increase of laying angle from 0°to 459,the length of fracture crack and the damage area increase.The developed model can accurately predict the impact properties of the composites.
