Journal ArticleDOI
Forming of AA5182-O and AA5754-O at elevated temperatures using coupled thermo-mechanical finite element models
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TLDR
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.About:
This article is published in International Journal of Plasticity.The article was published on 2007-05-01. It has received 206 citations till now. The article focuses on the topics: Formability & Plane stress.read more
Citations
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Review of warm forming of aluminum-magnesium alloys
TL;DR: In this paper, the formability and surface quality of the final product of these alloys are not good if processing is performed at room temperature, however, they have been shown to increase at temperature range from 200 to 300°C and better surface quality has been achieved.
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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.
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A review on forming techniques for manufacturing lightweight complex—shaped aluminium panel components
TL;DR: In this paper, a comprehensive review of widely used forming processes for aluminium alloys, under cold, warm and hot forming conditions, and the material characteristics and equipment used for each process are presented.
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Warm forming behavior of high strength aluminum alloy AA7075
TL;DR: In this article, the formability of aluminum alloy AA7075 at elevated temperature was investigated through experiment, and the results showed that deep drawing and stretch formability can be significantly improved when the blank is heated to 140-220°C.
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Constitutive modelling of plasticity of fcc metals under extremely high strain rates
C.Y. Gao,Liangchi Zhang +1 more
TL;DR: In this paper, a unified constitutive model is proposed to describe the fcc crystalline plasticity at the extreme strain rate beyond which the material sensitivity to strain rate increases dramatically, and an optimization method is used to obtain globally optimal parameters in the model.
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.
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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.
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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.
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A six-component yield function for anisotropic materials
TL;DR: In this paper, a new six-component yield surface description for orthotropic materials is developed, which has the advantage of being relatively simple mathematically and yet is consistent with yield surfaces computed with polycrystal plasticity models.
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Linear transfomation-based anisotropic yield functions
TL;DR: In this article, two convex formulations are proposed to describe the anisotropic behavior of metals and alloys for a full stress state (3D) in general terms, and the type of input data recommended for the description of plastic anisotropy in sheet samples is discussed.