Testing and characterization of anisotropic plasticity of 6061-T6 aluminum alloy sheet: From in-plane to out-of-plane

IF 5.3 2区工程技术 Q1 MECHANICS

Engineering Fracture Mechanics Pub Date : 2025-02-07 DOI:10.1016/j.engfracmech.2024.110736

Peihua Zhu , Shitong Chen , Qilin Zhang , Yao Zhang , Zhiyang Xie

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引用次数: 0

Abstract

This paper presents material testing and characterization of anisotropic plasticity of 6061-T6 aluminum alloy rolled sheets. A total of 27 different specimen types are designed, considering various geometric configurations, sampling directions, and loading directions, including two newly developed out-of-plane specimens. Uniaxial tensile tests on smooth square bars oriented at different angles relative to the rolling direction are conducted to measure the material’s plastic strain ratios. The results reveal that the plastic volume of the aluminum alloy changes as plastic deformation progresses, challenging the conventional assumption of plastic incompressibility. Based on extensive experimental data, a new orthogonal anisotropic yield criterion is proposed. This criterion can fully characterize the transverse isotropy (i.e., in-plane isotropy and out-of-plane anisotropy), tension–compression asymmetry, and pressure-independent plastic properties of 6061-T6 aluminum alloy rolled sheets.

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6061-T6铝合金薄板各向异性塑性测试与表征：从面内到面外

本文介绍了6061-T6铝合金轧制薄板的材料试验及各向异性塑性特性。考虑到不同的几何形态、采样方向和加载方向，共设计了27种不同的试样类型，其中包括两种新开发的面外试样。采用相对于轧制方向不同角度的光滑方棒进行单轴拉伸试验，测量材料的塑性应变比。结果表明，铝合金的塑性体积随着塑性变形的进行而变化，挑战了传统的塑性不可压缩假设。在大量实验数据的基础上，提出了一种新的正交各向异性屈服准则。该准则能够充分表征6061-T6铝合金轧制板的横向各向同性（即面内各向同性和面外各向异性）、拉压不对称和不依赖压力的塑性性能。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Engineering Fracture Mechanics 物理-力学

CiteScore

8.70

自引率

13.00%

发文量

606

审稿时长

74 days

期刊介绍： EFM covers a broad range of topics in fracture mechanics to be of interest and use to both researchers and practitioners. Contributions are welcome which address the fracture behavior of conventional engineering material systems as well as newly emerging material systems. Contributions on developments in the areas of mechanics and materials science strongly related to fracture mechanics are also welcome. Papers on fatigue are welcome if they treat the fatigue process using the methods of fracture mechanics.