A new model to describe effect of plastic deformation on elastic modulus of aluminum alloy

臧顺来; 郭成; 魏公际; 谌峰; 董伟; 张珂

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A new model to describe effect of plastic deformation on elastic modulus of aluminum alloy

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＜正＞In order to improve the prediction capability of spring-back in aluminum sheet metal forming, the influence of the plastic deformation on elastic modulus is considered when the material undergoes a large plastic deformation. The present work focused on establishing a new model to accurately describe the relation of elastic modulus and plastic deformation. The tensile tests were performed to investigate the influence of plastic deformation on elastic modulus at low strain rate. Two different aluminum sheets were used, AA2024-T3 and LY12-CZ, and the thickness of sheet metals was 1.3 mm and 2.0 mm, respectively. In order to overcome the drawback, which is directly measuring the slope of tension curve to obtain elastic modulus, an extrapolation method was adopted. The proposal macroscopic piecewise sinusoidal function can accurately model the elastic modulus variation.

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《中国有色金属学报：英文版》 |2006年第s3期|1314-1318|共5页
作者
臧顺来; 郭成; 魏公际; 谌峰; 董伟; 张珂;
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作者单位

1. School of Mechanical Engineering;

Xi'an Jiaotong University;

Xi'an 710049;

China 2. State Key Laboratory of Plastic Forming Simulation and Die & Mould Technology;

Huazhong University of Science and Technology;

Wuhan 430074;

China 3. School of Mechanical Eng;

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正文语种 chi
中图分类压力加工理论;
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机译：塑性变形;弹性模量;铝合金;回弹;

A new model to describe effect of plastic deformation on elastic modulus of aluminum alloy

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