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چکیده
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In this work, the effect of deep rolling on bending fretting fatigue resistance of Al7075 is investigated. Rotary bending fretting fatigue tests are conducted on a Moore rotary bending apparatus. The effects of various parameters of deep rolling such as rolling ball diameter, rolling depth, rotational speed of specimen, feed rate, and rolling pass number are investigated by experimental and numerical simulations. The residual stress distribution due to rolling is determined using Abaqus finite element code. In order to consider the real material characteristics such as Bauschinger effect and cyclic kinematic hardening behavior, the Chaboche nonlinear kinematic hardening model is used in the numerical simulations. Fractography of specimens after failure is accomplished using optical microscopy.
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