Results 261 to 270 of about 382,729 (291)

The non-proportional loading of mild steel

Materials Research Proceedings
Abstract. The effect of proportional loading on formability has been extensively studied. However, non-proportional loading occurs frequently in a stamping operation and its impact on formability has been studied less. Non-proportional loading occurs in two areas of stamping: continuously during the draw stage of a complex geometry and discontinuously ...
openaire   +1 more source

Modeling of stable cyclic stress‐strain responses under non‐proportional loading

ZAMM - Journal of Applied Mathematics and Mechanics / Zeitschrift für Angewandte Mathematik und Mechanik, 2017
AbstractThis paper proposes a simple two‐surface plasticity model for strain controlled conditions which includes only five material constants to describe the stable stress‐strain relationship under extensive non‐proportional loadings. In this model, the Mróz kinematic hardening rule is adopted to describe the instantaneous translation of the yield ...
Li, Jing, Li, Chun-wang, Zhang, Zhong-ping   +2 more
openaire   +2 more sources

Microcrack propagation under non-proportional multiaxial alternating loading

2003
Abstract Non-proportional multiaxial fatigue tests of tubular specimens were performed under purely alternating strain-controlled loading. Both the load paths and the phase shifts were varied. With increasing phase shift at the same equivalent load, the lifetime was found to increase.
openaire   +1 more source

A multiaxial cyclic plasticity model for non-proportional loading cases

International Journal of Plasticity, 1998
From the conclusions: We propose a two-surface plasticity model for non-proportional loading using a nonlinear hardening rule with evanescent memory evolution. The additional term incorporated in the Armstrong-Frederick kinematic hardening rule for cyclic loading is modified to account for continuous non-proportional stress loading paths.
Basuroychowdhury, I. N., Voyiadjis, G. Z.   +1 more
openaire   +2 more sources

Dynamic Plastic Deformation for Non-Proportional Loading Paths

1982
Improved understanding of the plastic response of metals subjected to loading histories which include marked changes in direction of the stress trajectories (in a hyperspace of components of the stress tensor) is of fundamental importance in plasticity theory and its applications.
openaire   +1 more source

Anisotropic Plasticity During Non-proportional Loading

2022
Frédéric Barlat, Seong-Yong Yoon
openaire   +1 more source

Choice of Objective Rate for Non-Proportional Loading Applications

Computer Technology and Applications, 2004
Traditionally, the validation of three dimensional constitutive formulations (i.e. theories of plasticity) has been carried out using biaxial testing. The most widely used method for biaxial testing is the combined tension-torsion loading of thin-walled cylindrical specimens. Unfortunately, the results obtained in the past, using the incremental theory
openaire   +1 more source

An evolution of subsequent yield loci under proportional and non-proportional loading path of ‘as-received’ extruded AZ31 magnesium alloy: Experiments and CPFEM modeling

International Journal of Plasticity, 2022
Abbas Iftikhar, Abhijit P Brahme, Kaan Inal   +2 more
exaly  

Experimental and numerical investigation of differential hardening of cold rolled steel sheet under non-proportional loading using biaxial tensile test

International Journal of Plasticity, 2022
Abhishek Raj, Pinaki Biswas
exaly  

Proportional analysis of non-proportional loadings

2005
H. Jahed, M. Noban
openaire   +1 more source