Journal ArticleDOI
Forming of aluminum alloys at elevated temperatures ¿ Part 2: Numerical modeling and experimental verification
TLDR
In this article, the cutting plane algorithm for the integration of a general class of elasto-plastic constitutive models was used to implement this yield function into the commercial FEM code LS-Dyna as a user material subroutine (UMAT).About:
This article is published in International Journal of Plasticity.The article was published on 2006-02-01. It has received 128 citations till now. The article focuses on the topics: Stamping & Yield (engineering).read more
Citations
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Anisotropic hardening and non-associated flow in proportional loading of sheet metals
TL;DR: In this paper, a non-associated flow rule (NAFR) model is proposed to improve the accuracy of springback, tearing, and earing predictions for aluminum and stainless steel alloys.
Journal ArticleDOI
Advances in anisotropy and formability
TL;DR: In this paper, a review of the experimental methods used for characterizing and modeling the anisotropic plastic behavior of metallic sheets and tubes under biaxial loading is presented together with the models and methods developed for predicting and establishing the limit strains.
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Forming of AA5182-O and AA5754-O at elevated temperatures using coupled thermo-mechanical finite element models
TL;DR: In this article, a coupled thermo-mechanical finite element analysis of the forming process was performed for the temperature range 25-260°C (77-500°F) at different strain rates.
Journal ArticleDOI
Forming of aluminum alloys at elevated temperatures – Part 1: Material characterization
TL;DR: A temperature-dependent anisotropic material model for use in a coupled thermo-mechanical finite element analysis of the forming of aluminum sheets was developed in this article, where the anisotropy properties of the aluminum alloy sheet AA3003-H111 were characterized for a range of temperatures 25 −260 −C (77 −500 −F) and for different strain rates.
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Deformation induced anisotropic responses of Ti–6Al–4V alloy Part II: A strain rate and temperature dependent anisotropic yield criterion
TL;DR: Based on the extensive new experimental results, a yield criterion is proposed to describe the anisotropic yield behavior and tension compression asymmetry characteristics of an electron beam single melt Ti-6Al-4V alloy as mentioned in this paper.
References
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Journal ArticleDOI
A theory of the yielding and plastic flow of anisotropic metals
TL;DR: In this article, a theory is suggested which describes the yielding and plastic flow of an anisotropic metal on a macroscopic scale and associated relations are then found between the stress and strain-increment tensors.
Journal ArticleDOI
Limit strains in the processes of stretch-forming sheet metal
TL;DR: In this paper, a theoretical analysis of the process of the generation of the groove based on anisotropic plasticity theory is presented, and the system of equations derived was solved numerically with the aid of a computer, which enabled the limiting strain of the sheet metal to be determined as a function of the material.
Journal ArticleDOI
Plane stress yield function for aluminum alloy sheets—part 1: theory
Frédéric Barlat,Frédéric Barlat,J.C. Brem,Jeong W. Yoon,Jeong W. Yoon,Kwansoo Chung,Re Dick,D.J. Lege,Farhang Pourboghrat,Shi-Hoon Choi,E. Chu +10 more
TL;DR: In this article, a plane stress yield function that well describes the anisotropic behavior of sheet metals, in particular, aluminum alloy sheets, was proposed, which was introduced in the formulation using two linear transformations on the Cauchy stress tensor.
Journal ArticleDOI
An analysis of a new class of integration algorithms for elastoplastic constitutive relations
Michael Ortiz,Juan C. Simo +1 more
TL;DR: In this article, an accuracy analysis of a new class of integration algorithms for finite deformation elastoplastic constitutive relations was carried out, where attention was confined to infinitesimal deformations.
Journal ArticleDOI
A unified approach to finite deformation elastoplastic analysis based on the use of hyperelastic constitutive equations
Juan C. Simo,Michael Ortiz +1 more
TL;DR: By assuming from the outset hyperelastic constitutive behavior, an alternative approach to finite deformation plasticity and viscoplasticity is proposed whereby the need for integration of spatial rate constitutive equations is entirely bypassed.
Related Papers (5)
Plastic behavior and stretchability of sheet metals. Part I: A yield function for orthotropic sheets under plane stress conditions
Frédéric Barlat,K. Lian +1 more