Topic
von Mises yield criterion
About: von Mises yield criterion is a research topic. Over the lifetime, 4374 publications have been published within this topic receiving 82642 citations. The topic is also known as: Von Mises stress.
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TL;DR: In this paper, the inelastic behavior of the aluminum alloy was modeled through isotropically hardening plasticity, and a non-quadratic yield function was used instead of a J 2 -type yield surface.
28 citations
TL;DR: In this article, the formation of internal cracks in GCr15 bearing steels during the soft reduction process in rectangular bloom continuous casting, fully coupled thermomechanical finite element models were developed using the commercial software MSC.
Abstract: To investigate the formation of internal cracks in GCr15 bearing steels during the soft reduction process in rectangular bloom continuous casting, fully coupled thermomechanical finite element models were developed using the commercial software MSC.MARC, and microstructures and fractographs were also observed. With the finite element models, the contours of temperature, equivalent plastic strain, and equivalent von Mises stress were simulated. It is observed that the fracture surfaces of internal cracks are covered by cleavage or quasi-cleavage facets. The region of internal cracks in the intergranular brittle fracture mode is in the mushy zone between the zero ductility temperature (ZDT) and the zero strength temperature (ZST). The simulated equivalent plastic strain in the crack region is 2.34%–2.45%, which is larger than the critical strain (0.4%–1.5%), and the equivalent von Mises stress is 1.84–5.05 MPa, which is within the range of critical stress (3.9–7.2 MPa), thus resulting in the occurrence of internal cracks. Reducing the soft reduction amount from 3 to 2 mm can lower the stress under the critical value.
28 citations
TL;DR: In this paper, the springback and twist deformation of asymmetric AA6060-T4 aluminum tube in rotary draw bending process are studied experimentally and numerically.
28 citations
TL;DR: In this article, a rate-dependent model for damage and plastic deformation of brittle materials under dynamic loading is presented, which improves upon a recently developed micromechanical damage model (Zuo et al., 2006) by incorporating plastic deformations of the material.
28 citations
01 Dec 1991
TL;DR: In this paper, a finite element model for analyzing the elastic-plastic non-uniform torsion behavior of thin-walled steel I-beams is presented.
Abstract: This paper presents a finite element model for analysing the elastic-plastic nonuniform torsion behaviour of thin-walled steel I-beams. The model uses Vlasov's warping strain model to represent warping torsion, and a mitre model for uniform torsion. The mitre model allows the representation at the tips of flanges of the transverse uniform torsion shear stresses. For elastic-plastic analysis, the incremental theory of plasticity is adopted, employing the Prandtl-Reuss flow rule and the von Mises yield criterion. The material state determination algorithm and the variable arc-length method are also employed to improve the accuracy and reliability of the solutions. The numerical integration over the cross-section is carried out by dividing it into a number of triangular areas and then applying the no-bias area-coordinate Gaussian numerical integration scheme. The numerical examples provided show that good agreement is obtained with predictions of other models of inelastic nonuniform torsion and the experimental results by using the present finite element model. It is also concluded that the present model can predict more realistic results at higher rotations than other models which ignore the transverse uniform torsion shear stresses.
28 citations