Abstract An holistic view is attempted towards prediction of the effect residual stresses induced by full-forward extrusion on fatigue life workpieces during operation. To study constitutive model accuracy forming simulations, a combined nonlinear isotropic/kinematic hardening as well isotropic part same are calibrated based five compression-tension-compression uniaxial stress experiments. A fi...

In this paper an algorithm for large strain elasto-plasticity with isotropic hyperelasticity based on the multiplicative decomposition is formulated. The algorithm includes a (possible) constitutive equation for the plastic spin and mixed hardening in which the principal stress and principal backstress directions are not necessarily preserved. It is shown that if the principal trial stress dire...

Short title: Non-classical plasticity theories and generalized normality. A simple way to define the flow rules of plasticity models is the assumption of generalized normality associated with a suitable pseudo-potential function. This approach, however, is not usually employed to formulate endochronic theory and non-linear kinematic (NLK) hardening rules as well as generalized plasticity models...

Stress–strain response under constant and variable strain-rate is studied for selected models of inelastic behavior. The derived closed-form solutions for uniaxial loading enable simple evaluation of the strain-rate effects on the material response. The effect of an abrupt change of strain-rate is also examined. Non-Newtonian viscosity which decreases with an increasing strain-rate is incorpora...

The computational modeling of hysteretic dampers is a powerful tool for design, allowing us to predict and optimize damper performance. In this research, numerical model, based on Chaboche’s nonlinear kinematic hardening constitutive law, was implemented. parameters law were identified validated by inverse analysis, the macro-hysteretic response hexagonal honeycomb steel damper. model applied s...

Abstract The paper aims to investigate the fatigue behavior of widely used AA2024‐T351 aluminum alloy in aircraft industry. An experimental program was conducted study life and damage under symmetrical tensile‐compressive loading. Cyclic tests low cycle regime were performed fully reversed total strain amplitudes from 0.6% 1.2%. exhibited cyclic hardening until failure. Symmetric high also para...

The axial crushing of thin-walled tubes has been the subject of extensive research in the past. The existing kinematic models for predicting crushing behavior of axially loaded thin-walled tubes are systematically reviewed and analyzed. The advantages and limitations of each model are discussed. A new chain link model for circular tubes and square tubes is presented and studied in detail. Unlik...