Residual Stresses in a Metal Plate Obtained Via Shot Peening: Experiment and Computer Simulation
a:2:{s:4:"TEXT";s:87:"A. Yu. Larichkin, A. A. Shtertser, S. N. Korobeinikov, V. Yu. Ul’yanitskii, D. K. Rybin";s:4:"TYPE";s:4:"text";}
Lavrentyev Institute of Hydrodynamics, Siberian Branch, Russian Academy of Sciences, Novosibirsk, Russia
Keywords: residual stresses, Almen method, shot peening, finite element analysis, inverse problem
Abstract
A method is developed for determining residual stresses in a thin metal plate via shot peening of its surface. The reference configuration of the plate is assumed to be flat with a layer of hardened material of known thickness with a uniform longitudinal initial stress; its value is determined by solving the inverse problem of establishing the equilibrium state of a bent plate. The problem of bending a plate with initial stresses is solved numerically by the finite element method using the model of an isotropic hypoelastic material. As a result of solving the problem, a residual stress field is determined, allowing one to estimate the degree of danger of positive principal stresses that can lead to destruction of the plate material.
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