Effect of stress amplitude on uniaxial ratcheting of aluminum alloy 2124-T851

Abstract

This paper presents the latest research results of ratcheting behavior of aluminum alloy 2124‐T851 under uniaxial loading. All fatigue tests were carried out at the Technical University of Ostrava mainly under block loading in order to determine the effect of stress amplitude and mean stress on the strain response of the material. Experimental results show that the critical value of the axial deformation is close to the ductility of the material investigated. The aim of this paper also is to draw important conclusions in terms of ratcheting modelling for the material investigated.

Comparison of FE analysis and experimentally obtained data for the identification of residual stresses in welded high-strength steel

“…If the material is pulled, it is a tensile residual stress with positive values. Normal residual stresses are acting perpendicularly to the surface and the shear residual stresses act in the plane of the material surface [2,3].…”

Numerical study of the relation between chosen statistical parameters of input stresses and cumulative fatigue damage provided rainflow decomposition

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Optimization and design of the vulcanization press sandwich pressure plate parameters

“…• evaluation of results -determination of weight, maximum equivalent stresses according to von Mises theory, maximum plate deflection and evaluation of fulfillment of the conditions according to relations (2) and (3) [18,19], • in the event of non-fulfillment, the target function is penalized, otherwise the target function value is determined based on the calculated weight of the structure. The shape of the target function according to equation (5) and its evaluation procedure is suggested for the following reason -if the geometric constraints for the area of permissible solutions (4) are not met, the FEM analysis is not required.…”