Abstract
The paper deals with the numerical investigation and implementation of the two-surface plasticity model (or bounding surface model). This plasticity theory allows to describe the deformation behavior under large strain cyclic plasticity and the material stress-strain responses at small-scale re-yielding after large pre-straining. A novel strategy to model the isotropic hardening stagnation is developed within a fully implicit integration scheme in order to speed up the computation and to improve the material description.
Highlights
Plastic deformation on metallic materials represents an important aspect in civil engineering and in several industrial sectors
An interesting aspect in [9] and [10] is the resolution strategy for the implicit update of the workhardening stagnation, necessary to model the stress plateau observed in metals sheets subjected to cyclic loading conditions
The goal of this work is to develop a fully implicit integration scheme of the two-surface plasticity model proposed by Yoshida and Uemori, formulating a novel algorithm for the evaluation of the workhardening stagnation with an accuracy imposed by the user
Summary
Plastic deformation on metallic materials represents an important aspect in civil engineering and in several industrial sectors (automotive, construction, naval, etc.). An underestimation of the material capability of bearing loads, or an incorrect design of components can lead to a catastrophic outcome with severe consequences in terms of lives or economic impact This problem has been deeply investigated by many authors, resulting in a high number of analytical and numerical models that try to catch a realistic description of irreversible deformation in structural analyses and design processes. A brief description of the algorithm proposed by Ghaei and Green is presented, highlighting the main aspects and assumptions
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