Abstract

The paper analyzes the propagation law of stress waves in CFRP unidirectional plate specimens and adhesive plate specimens under laser shock conditions using a combination of experimentation and simulation. The finite element model is corrected by using the back particle velocity curve obtained from the experiment. Subsequently, the spatiotemporal stress distribution is extracted from the finite element model. The results indicate an overall attenuation trend of the stress wave propagating in the unidirectional plate. In the adhesive plate, the peak value of the stress wave increases first at the adhesive layer position due to the acoustic impedance mismatch and energy absorption characteristics of the adhesive layer material and CFRP. Then it tends to increase after decay. Moreover, the behavior characteristics of the stress wave differ significantly when it propagates from high-impedance material to low-impedance material compared to when it propagates from low-impedance material to high-impedance material.

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