Analysis of dynamic mechanical response characteristics of composite under variable pulse width laser
Based on the study of the propagation characteristics of laser-induced shock waves in materials and the underlying principles of material delamination,there exists potential for the development of a non-destructive testing technique for interface bonding strength utilizing laser-induced shock waves.Such an advancement holds sig-nificant importance in investigating the dynamic mechanical response characteristics of composite materials under the influence of lasers with varying pulse widths.This study entailed the measurement of particle velocities on the back-side of composite laminates subjected to laser shock with diverse pulse widths.Additionally,a finite element model was constructed for carbon fiber reinforced composite laminates subjected to laser shock,allowing for an exploration of the coupling laws governing stress wave propagation within the laminates under both single-sided and double-si-ded laser shock scenarios with differing pulse widths.The findings indicate that as the pulse width of the laser shock load increases,under single-sided laser shock,there is an escalation in the maximum tensile stress within the lami-nate.Moreover,the position of the maximum tensile stress shifts towards the surface subjected to laser shock.Double-sided laser shock results in a more concentrated distribution of maximum tensile stress both temporally and spatially within the target plate.Furthermore,under double-sided laser shock,prolonging the delay time of laser shock on one side of the target plate leads to a notable displacement of the position of maximum tensile stress to-wards the opposite side.
composite laminatelaser shockfinite element analysisdynamic mechanical responsestress wave
万方数据
维普
