The bending deformation of 2024 aluminium alloy plate peened with rectangular laser beam of uniform intensity has been studied theoretically and experimentally. Based on the biharmonic equation and pure bending model, the residual stress and radius of curvature are derived from the laser intensity and the depth from the laser peened surface. Aluminium alloy plate was formed by the uniform rectangular laser spot shaped from Nd: glass pulse laser. The residual stress distribution of peened aluminium alloy plate was measured by X-ray diffraction, and the experimental radius of curvature was 2147.3 mm at a laser intensity of 3.3 GW cm− 2. The measured results, both the distribution of residual stress and radius of curvature, fit well with those obtained from the proposed theory.

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In this paper, based on the basic shock wave relations and the stiffened gas equation of state, the laser-induced shock pressures, which are generated with homogenous rectangular laser pulse at power density of several GW/cm2, are proposed theoretically and experimentally. The laser-induced shock pressures are affected by the laser power density as well as the shock velocities, initial densities and adiabatic exponents of the target material and confined water which are considered to be condensed matter other than “solid” or “perfect gas” in the previous work. Performed on Al-2024 alloys, the laser-induced shock wave was measured with the poly(vinylidene fluoride) transducer and recorded by the oscilloscope. The laser-induced shock pressure derived from the proposed method agrees much better with the experimental results than that using the “solid” or “perfect gas” theory.