metallographic and finite element evaluation of plastic

A Finite Element Study of Elasto-Plastic Hemispherical

Apr 07, 2005 · This work presents a finite element study of elasto-plastic hemispherical contact. The results are normalized such that they are valid for macro contacts (e.g., rolling element bearings) and micro contacts (e.g., asperity contact), although micro-scale surface characteristics such as grain boundaries are not considered. Analysis of Strain in Cutting Zone with FEM and Finite element modelling (FEM) of machining is a widely applied way to get information about the phenomena occurring during the cutting process. This paper discusses experimental work and FEM analysis to investigate the mechanism of CK45 (1.0503) carbon steel chip formation during orthogonal turning process. Local strain in cutting zone is estimated by measurement of deformation of

Contour integral evaluation:two-dimensional case

This example verifies the evaluation of the J-integral, stress intensity factors, and T-stress, based on either the conventional finite element method or the extended finite element method. Contour integral evaluation:two-dimensional case The singularity in strain for a plastic hardening material lies somewhere between 1 / r and 1 / r. Evaluation of localization and failure of boron alloyed Mar 01, 2014 · 3. Modelling. Mesh dependency issues in conventionally conducted finite element analysis of localization phenomena incorporates several aspects. Loss of ellipticity of the governing equations causes numerical solutions to be inherently mesh dependent as the width of the localized band is set by the mesh spacing (Needleman, 1988).The ability of the finite element mesh to resolve Field Metallographic Replication - When it helps, and when Apr 30, 2020 · Field Metallographic Replication, or FMR, is a nondestructive way to get a look at a materials surface microstructure. But before we jump into a discussion of FMR, lets review traditional microstructural evaluation so we can better compare and contrast the two.

Finite Element Analysis of a Compressor Housing Used in

Plastic Hinge. A plastic hinge is an idealized concept used in Limit Analysis. In a beam or a frame, a plastic hinge is formed at the point where the moment, shear, and axial force lie on the yield interaction surface. In plates and shells, a plastic hinge is formed where Finite element simulations of notch tip fields in Aug 29, 2014 · Recent experiments using three point bend specimens of Mg single crystals have revealed that tensile twins of $$\\{10\\bar{1}2\\}$$ { 10 1 ¯ 2 } -type form profusely near a notch tip and enhance the fracture toughness through large plastic dissipation. In this work, 3D finite element simulations of these experiments are carried out using a crystal plasticity framework which includes Finite element study for nanoindentation measurements Finite element simulations of conical indentations in two-phase elasticplastic materials were used to investigate the influence of the shape and the aspect ratio of particles embedded in a matrix material on the deformation behavior and hardness during depth-sensing indentation. Starting with single-phase materials, pile-up behavior and its

Introduction to Finite Element Analysis (FEA) or Finite

The finite element method (FEM), or finite element analysis (FEA), is a computational technique used to obtain approximate solutions of boundary value problems in engineering. Boundary value problems are also called field problems. The field is the domain of interest JMMP Free Full-Text A Finite Element Study of Thermo The most accepted method for determining friction conditions in metal forming is the ring compression test (RCT). At high temperatures, extraction of the friction coefficient, μ, commonly requires numerical analysis due to the coupling between the mechanical and thermal fields. In the current study, compression tests of cylindrical specimens and RCT experiments were conducted on Modeling of the Plastic Deformation of Polycrystalline Recent experiments on polycrystalline materials show that nanocrystalline materials have a strong dependency to the strain rate and grain size in contrast to the microcrystalline materials. In this study, mechanical properties of polycrystalline materials in micro and nanolevel were studied and a unified notation for them was presented. To completely understand the rate-dependent stress-strain

The `effective-stress-function' algorithm for thermo

An algorithm for stable and accurate computations of stresses in finite element thermo-elastic-plastic and creep analysis of metals is presented. The effective-stress-function algorithm solves the governing equations of the inelastic constitutive behaviour by calculating the Finite Element Simulation of Plastic Joining Processes of May 17, 2007 · Various high tensile strength steel sheets and an aluminum alloy sheet were joined with a self-piercing rivet. It is not easy to weld the aluminum alloy sheet and high tensile strength sheets by means of conventional resistance welding because of very different melting points. To obtain optimum