Journal ArticleDOI
A model for the hot or warm forming of metals with special use of deformation mechanism maps
TLDR
In this paper, a finite element model is described for analyzing metal flow and heating during large deformation processes such as hot rolling and particle thermomechanical histories are evaluated relative to the spatial coordinates of the computational domain.About:
This article is published in International Journal of Mechanical Sciences.The article was published on 1984-01-01. It has received 34 citations till now. The article focuses on the topics: Deformation mechanism & Constitutive equation.read more
Citations
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Journal ArticleDOI
Modeling strain hardening and texture evolution in friction stir welding of stainless steel
TL;DR: Steady-state friction stir welding of stainless steel has been modeled using an Eulerian formulation that considers coupled viscoplastic flow and heat transfer in the vicinity of the tool pin this article.
Journal ArticleDOI
Application of polycrystal plasticity to sheet forming
TL;DR: In this article, a finite element formulation is developed for the analysis of the inhomogeneous macroscopic deformations of metal forming, and anisotropic material properties are derived from a microscopic description based on polycrystal plasticity theory.
Journal ArticleDOI
Three-dimensional deformation process simulation with explicit use of polycrystal plasticity models
TL;DR: In this article, a finite element method is used to solve for the three-dimensional deformation of a plastic workpiece, where the elemental constitutive response is derived from the microstructural response of a polycrystal aggregate situated in the element.
Journal ArticleDOI
Finite element modelling of polymethylmethacrylate flow through cancellous bone.
TL;DR: A mathematical model based on the Finite Element Method is developed to simulate the non-linear flow of acrylic bone cement through cancellous bone and results in an increase of apparent permeability when compared to the permeability computed for linear flow.
Journal ArticleDOI
On modeling of mechanical property changes during flat rolling of aluminum
TL;DR: In this paper, a forming model that assumes rate-dependent plastic flow of the aluminum slabs was used to simulate the rolling behavior of the slabs and the resulting hardness was compared to measured yield strength for the same slabs.
References
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Journal ArticleDOI
Diffusion-accommodated flow and superplasticity
M.F. Ashby,R. A. Verrall +1 more
TL;DR: In this article, a new mechanism for superplastic deformation is described and modelled, which differs fundamentally from Nabarro-Herring and Coble creep in a topological sense: grains switch their neighbors and do not elongate significantly.
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Development of a Processing Map for Use in Warm-Forming and Hot-Forming Processes
TL;DR: In this article, a fracture initiation map is developed which should be useful in fast forming operations at strain rates greater than about 10-3 s-1 at elevated temperatures, and two types of cavitation mechanisms, one pertaining to cavity formation at second phase particles, as in ductile fracture, and the other pertaining to wedge type microcracking at grain boundaries, are considered.
Journal ArticleDOI
Flow of solids during forming and extrusion: Some aspects of numerical solutions
TL;DR: In this paper, the problem of elastic spring-back is investigated and transient free surface solutions are demonstrated for stretch forming and deep drawing, which is shown to be capable of dealing with boundary friction and strain hardening.
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Determination of flow stress: Part 1 constitutive equation for aluminium alloys at elevated temperatures
T. Sheppard,D. S. Wright +1 more
TL;DR: In this article, an alternative form of the hyperbolic sine relationship is developed for use as a constitutive equation at elevated temperatures, and an optimization technique may be applied to results from torsion tests to determine the constants in this equation and that this method must be more accurate than those presented previously.
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Intergranular fracture during power-law creep
G.H. Edward,M.F. Ashby +1 more
TL;DR: In this article, the growth of an array of grain boundary voids during creep deformation is analysed, and the growth by power-law creep alone cannot completely explain the observed times ( t ǫ ) or strains ( ϵ ǒ ) to fracture.