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

被引：7

作者：

Cao, Jun ^{[1
]}

Li, Fuguo ^{[2
]}

Ma, Weifeng ^{[1
]}

Li, Dongfeng ^{[1
,3
]}

Wang, Ke ^{[1
]}

Ren, Junjie ^{[1
]}

Nie, Hailiang ^{[1
]}

Dang, Wei ^{[1
]}

机构：

[1] Tubular Goods Res Inst CNPC, State Key Lab Performance & Struct Safety Petr Tu, Xian 710077, Peoples R China

[2] Northwestern Polytech Univ, Sch Mat Sci & Engn, State Key Lab Solidificat Proc, Xian, Peoples R China

[3] China Univ Petr East China, Qingdao, Peoples R China

来源：

PHILOSOPHICAL MAGAZINE LETTERS | 2020年 / 100卷 / 10期

基金：

中国国家自然科学基金;

关键词：

Stress-strain measurements; numerical simulation; tensile testing; necking; HARDENING BEHAVIOR; SHEET METALS; TENSILE TEST; IDENTIFICATION; METHODOLOGY; STEEL; WORK;

D O I：

10.1080/09500839.2020.1803508

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

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.

引用

页码：476 / 485

页数：10

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