Dynamical modeling of bi-layer Aluminium adhesive tape for laser shock applications

https://doi.org/10.1016/j.optlastec.2023.109366Get rights and content
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Highlights

  • High strain rate modeling of aluminium adhesive tape.

  • Dynamical material characterization of polymers.

  • Process optimization using validated material model.

  • Modeling of protective layer for Laser Shock Peening and Laser Adhesion Test.

Abstract

The presented work covers the response of Aluminium tape (Al tape) under high strain rate of deformation (order of 106s1) using laser shock. High power laser (J) with a short pulse duration (ns) is used to create laser shock within the water confinement regime on two Al tape configurations in order to apply low and high pressure (order of MPa and GPa). Al tape has been modeled using Johnson-Cook (J-C) material model for the Al layer, and Steinberg–Cochran–Guinan (SCG) material model (elastic with pressure dependence) for the adhesive layer, both material models are coupled with Grüneisen equation of state. The Al tape model has been validated by comparing the simulated Back Face Velocity (BFV) of the target with the measured one by the Velocity Interferometer System for Any Reflector (VISAR). In addition, the validated material model is used to conduct the sensitivity studies about the transmitted pressure depending on the acoustical impedance of the target and adhesive thickness. Moreover, location and magnitude of maximum tensile stress within the target are calculated in function of the adhesive thickness of the Al tape. Finally, it has been proved that using one laser beam configuration, maximum tensile zone could appears close to the front face by increasing the adhesive thickness.

Keywords

Laser shock
Dynamic material characterization
Polymer glassy behavior
High strain rate
Johnson–Cook
Steinberg–Cochran–Guinan

Data availability

Data will be made available on request.

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