Tensile properties and fatigue life simulation of hybrid B/CFRP laminates
To investigate the mechanical response and fatigue life of hybrid basalt/carbon fiber reinforced pol-ymer(B/CFRP)laminates,the hybrid laminates were fabricated by the wet lay-up method,and the basic ten-sile properties of B/CFRP laminates were investigated by uniaxial tensile tests with different lay-up quantities and lengths.Using the ABAQUS refined finite element model,the response characteristics of hybrid laminates during the tensile process were simulated.Combined with the fatigue theory,the stress-life curve of B/CFRP was analyzed.Based on the static load simulation results,the fatigue lives of B/CFRP under different stress amplitudes and stress ratios were predicted.The experimental results show that the specimen length has little effect on the mechanical properties of the laminate.The multi-stage fracture phenomenon gradually appears with the increase of the number of the BFRP layers.The finite element simulation values are in good agreement with the test values,and the fatigue ultimate strength of B/CFRP is 0.568 times the ultimate strength.With the same stress ratio,the higher the upper stress strength,the shorter the fatigue life and the more obvious the change.When the upper limit of stress is lower than 0.7 times the ultimate strength,the difference between the simulation life and the theoretical life is minor.
fiber reinforced polymertensile propertyfinite element simulationmulti-stage fracturefatigue life prediction
万方数据
维普
