Strain Rate-Dependent Constitutive and Low Stress Triaxiality Fracture Behavior Investigation of 6005 Al Alloy
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-Hopkinso...
Saved in:
| Main Authors: | , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Wiley
2018-01-01
|
| Series: | Advances in Materials Science and Engineering |
| Online Access: | http://dx.doi.org/10.1155/2018/2712937 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1849414096425844736 |
|---|---|
| author | Yong Peng Xuanzhen Chen Shan Peng Chao Chen Jiahao Li Guowei Liu |
| author_facet | Yong Peng Xuanzhen Chen Shan Peng Chao Chen Jiahao Li Guowei Liu |
| author_sort | Yong Peng |
| collection | DOAJ |
| description | 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. |
| format | Article |
| id | doaj-art-6e10958fece245f2881cc61974f268c8 |
| institution | Kabale University |
| issn | 1687-8434 1687-8442 |
| language | English |
| publishDate | 2018-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Advances in Materials Science and Engineering |
| spelling | doaj-art-6e10958fece245f2881cc61974f268c82025-08-20T03:33:56ZengWileyAdvances in Materials Science and Engineering1687-84341687-84422018-01-01201810.1155/2018/27129372712937Strain Rate-Dependent Constitutive and Low Stress Triaxiality Fracture Behavior Investigation of 6005 Al AlloyYong Peng0Xuanzhen Chen1Shan Peng2Chao Chen3Jiahao Li4Guowei Liu5School of Traffic and Transportation Engineering, Central South University, Changsha 410075, ChinaSchool of Traffic and Transportation Engineering, Central South University, Changsha 410075, ChinaSchool of Traffic and Transportation Engineering, Central South University, Changsha 410075, ChinaHunan Industry Polytechnic, Changsha 410208, ChinaSchool of Traffic and Transportation Engineering, Central South University, Changsha 410075, ChinaSchool of Traffic and Transportation Engineering, Central South University, Changsha 410075, ChinaIn 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.http://dx.doi.org/10.1155/2018/2712937 |
| spellingShingle | Yong Peng Xuanzhen Chen Shan Peng Chao Chen Jiahao Li Guowei Liu Strain Rate-Dependent Constitutive and Low Stress Triaxiality Fracture Behavior Investigation of 6005 Al Alloy Advances in Materials Science and Engineering |
| title | Strain Rate-Dependent Constitutive and Low Stress Triaxiality Fracture Behavior Investigation of 6005 Al Alloy |
| title_full | Strain Rate-Dependent Constitutive and Low Stress Triaxiality Fracture Behavior Investigation of 6005 Al Alloy |
| title_fullStr | Strain Rate-Dependent Constitutive and Low Stress Triaxiality Fracture Behavior Investigation of 6005 Al Alloy |
| title_full_unstemmed | Strain Rate-Dependent Constitutive and Low Stress Triaxiality Fracture Behavior Investigation of 6005 Al Alloy |
| title_short | Strain Rate-Dependent Constitutive and Low Stress Triaxiality Fracture Behavior Investigation of 6005 Al Alloy |
| title_sort | strain rate dependent constitutive and low stress triaxiality fracture behavior investigation of 6005 al alloy |
| url | http://dx.doi.org/10.1155/2018/2712937 |
| work_keys_str_mv | AT yongpeng strainratedependentconstitutiveandlowstresstriaxialityfracturebehaviorinvestigationof6005alalloy AT xuanzhenchen strainratedependentconstitutiveandlowstresstriaxialityfracturebehaviorinvestigationof6005alalloy AT shanpeng strainratedependentconstitutiveandlowstresstriaxialityfracturebehaviorinvestigationof6005alalloy AT chaochen strainratedependentconstitutiveandlowstresstriaxialityfracturebehaviorinvestigationof6005alalloy AT jiahaoli strainratedependentconstitutiveandlowstresstriaxialityfracturebehaviorinvestigationof6005alalloy AT guoweiliu strainratedependentconstitutiveandlowstresstriaxialityfracturebehaviorinvestigationof6005alalloy |