Constitutive equation for describing true stress-strain curves over a large range of strains

Cao Jun; Li Fuguo; Ma Weifeng; Li Dongfeng; Wang Ke; Ren Junjie; Nie Hailiang; Dang Wei

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Constitutive equation for describing true stress-strain curves over a large range of strains

机译：用于描述大型菌株的真正应力 - 应变曲线的本构方程

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Full-range strain hardening behaviour, containing the post-necking stage, is difficult to account for in detail. Hence, a Swift-Voce (S-V) model was used to describe the full-range stress-strain behaviour of 7050-T7451 aluminium alloy under uniaxial-tension, tension-with-notch and pure-shear processes with a hybrid experimental-numerical framework. Since the S-V model is not able to describe accurately the behaviour of Ti-6Al-4V alloy, a combined Swift and 4th degree polynomial (S-P4) model is proposed. Results indicate that the S-V model can successfully describe large-deformation behaviour of the 7050-T7451 aluminium alloy, and the S-P4 model can successfully describe that of the Ti-6Al-4V alloy based on careful designing process of the constitutive equation.

机译：包含颈缩后阶段的全范围应变硬化行为很难详细解释。因此，采用Swift Voce（S-V）模型，在混合实验数值框架下，描述了7050-T7451铝合金在单轴拉伸、带缺口拉伸和纯剪切过程中的全范围应力应变行为。由于S-V模型不能准确描述Ti-6Al-4V合金的行为，提出了一种结合Swift和四次多项式（S-P4）的模型。结果表明，基于本构方程的精心设计过程，S-V模型可以成功地描述7050-T7451铝合金的大变形行为，S-P4模型可以成功地描述Ti-6Al-4V合金的大变形行为。

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来源
《Philosophical Magazine Letters》 |2020年第12期|共10页
作者
Cao Jun; Li Fuguo; Ma Weifeng; Li Dongfeng; Wang Ke; Ren Junjie; Nie Hailiang; Dang Wei;
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作者单位

Tubular Goods Res Inst CNPC State Key Lab Performance &

Struct Safety Petr Tu Xian 710077 Peoples R China;

Northwestern Polytech Univ Sch Mat Sci &

Engn State Key Lab Solidificat Proc Xian Peoples R China;

Tubular Goods Res Inst CNPC State Key Lab Performance &

Struct Safety Petr Tu Xian 710077 Peoples R China;

Tubular Goods Res Inst CNPC State Key Lab Performance &

Struct Safety Petr Tu Xian 710077 Peoples R China;

Tubular Goods Res Inst CNPC State Key Lab Performance &

Struct Safety Petr Tu Xian 710077 Peoples R China;

Tubular Goods Res Inst CNPC State Key Lab Performance &

Struct Safety Petr Tu Xian 710077 Peoples R China;

Tubular Goods Res Inst CNPC State Key Lab Performance &

Struct Safety Petr Tu Xian 710077 Peoples R China;

Tubular Goods Res Inst CNPC State Key Lab Performance &

Struct Safety Petr Tu Xian 710077 Peoples R China;

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原文格式 PDF
正文语种 eng
中图分类物理学;
关键词
Stress-strain measurements; numerical simulation; tensile testing; necking;

机译：应力 - 应变测量;数值模拟;拉伸试验;缩颈;

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1. An experimental study on stress-strain behavior and constitutive model of hardfill material [J] . WU MengXi, DU Bin, YAO YuanCheng, 中国科学:物理学力学天文学（英文版） . 2011,第011期
2. A method of the direct measurement of the true stress-strain curve over a large strain range using multi-camera digital image correlation [J] . Li Junrui, Yang Guobiao, Siebert Thorsten, Optics and Lasers in Engineering . 2018,第auga期

机译：使用多相机数字图像相关性直接测量大应变范围内真实应力-应变曲线的方法
3. Obtaining Reliable True Plastic Stress-Strain Curves in a Wide Range of Strains Using Digital Image Correlation in Tensile Testing [J] . Yoon Jae Ik, Kim Jung Gi, Jung Jai Myun, Journal of Korean Institute of Metal and Materials . 2016,第4期

机译：在拉伸测试中使用数字图像相关性获得大范围菌株的可靠真实塑性应力-应变曲线
4. True stress-strain curve acquisition for irradiated stainless steel including the range exceeding necking strain [J] . Kamaya Masayuki, Kitsunai Yuji, Koshiishi Masato Journal of Nuclear Materials: Materials Aspects of Fission and Fusion . 2015,第Null期

机译：辐照不锈钢的真实应力-应变曲线采集，包括超过颈缩应变的范围
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6. Biomechanics of blunt liver injury: Relating internal pressure to injury severity and developing a constitutive model of stress-strain behavior. [D] . Sparks, Jessica L. 2007

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7. Stress-Strain Curves and Modified Material Constitutive Model for Ti-6Al-4V over the Wide Ranges of Strain Rate and Temperature [O] . Xin Hou, Zhanqiang Liu, Bing Wang, 2018

机译：宽应变速率和温度范围内Ti-6Al-4V的应力-应变曲线和修正的材料本构模型
8. Correlation between Engineering Stress-Strain and True Stress-Strain Curve [O] . Iman Faridmehr, Mohd Hanim Osman, Azlan Bin Adnan, 2014

机译：工程应力 - 应变与真正应力 - 应变曲线之间的相关性
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Constitutive equation for describing true stress-strain curves over a large range of strains

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