Strain Rate-Dependent Constitutive and Low Stress Triaxiality Fracture Behavior Investigation of 6005 Al Alloy
Joint Authors
Peng, Yong
Chen, Xuanzhen
Peng, Shan
Chen, Chao
Li, Jiahao
Liu, Guowei
Source
Advances in Materials Science and Engineering
Issue
Vol. 2018, Issue 2018 (31 Dec. 2018), pp.1-14, 14 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2018-05-03
Country of Publication
Egypt
No. of Pages
14
Abstract EN
In order to study the dynamic and fracture behavior of 6005 aluminum alloy at different strain rates and stress states, various tests (tensile tests at different strain rates and tensile shearing tests at five stress states) are conducted by Mechanical Testing and Simulation (MTS) and split-Hopkinson tension bar (SHTB).
Numerical simulations based on the finite element method (FEM) are performed with ABAQUS/Standard to obtain the actual stress triaxialities and equivalent plastic strain to fracture.
The results of tensile tests for 6005 Al show obvious rate dependence on strain rates.
The results obtained from simulations indicate the feature of nonmonotonicity between the strain to fracture and stress triaxiality.
The equivalent plastic strain reduces to a minimum value and then increases in the stress triaxiality range from 0.04 to 0.30.
A simplified Johnson-Cook (JC) constitutive model is proposed to depict the relationship between the flow stress and strain rate.
What is more, the strain-rate factor is modified using a quadratic polynomial regression model, in which it is considered to vary with the strain and strain rates.
A fracture criterion is also proposed in a low stress triaxiality range from 0.04 to 0.369.
Error analysis for the modified JC model indicates that the model exhibits higher accuracy than the original one in predicting the flow stress at different strain rates.
The fractography analysis indicates that the material has a typical ductile fracture mechanism including the shear fracture under pure shear and the dimple fracture under uniaxial tensile.
American Psychological Association (APA)
Peng, Yong& Chen, Xuanzhen& Peng, Shan& Chen, Chao& Li, Jiahao& Liu, Guowei. 2018. Strain Rate-Dependent Constitutive and Low Stress Triaxiality Fracture Behavior Investigation of 6005 Al Alloy. Advances in Materials Science and Engineering،Vol. 2018, no. 2018, pp.1-14.
https://search.emarefa.net/detail/BIM-1120195
Modern Language Association (MLA)
Peng, Yong…[et al.]. Strain Rate-Dependent Constitutive and Low Stress Triaxiality Fracture Behavior Investigation of 6005 Al Alloy. Advances in Materials Science and Engineering No. 2018 (2018), pp.1-14.
https://search.emarefa.net/detail/BIM-1120195
American Medical Association (AMA)
Peng, Yong& Chen, Xuanzhen& Peng, Shan& Chen, Chao& Li, Jiahao& Liu, Guowei. Strain Rate-Dependent Constitutive and Low Stress Triaxiality Fracture Behavior Investigation of 6005 Al Alloy. Advances in Materials Science and Engineering. 2018. Vol. 2018, no. 2018, pp.1-14.
https://search.emarefa.net/detail/BIM-1120195
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1120195