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| Eigen-strain-based multiscale homogenization application for HCP polycrystalline plasticity |
| Received:June 25, 2018 Revised:August 14, 2018 |
| View Full Text View/Add Comment Download reader |
| DOI：10.7511/jslx20180625001 |
| KeyWord:crystal plasticity eigen-strain homogenization HCP crystal |
| Author | Institution |
| 刘洋 |
大连理工大学 汽车工程学院, 大连 |
| 朱祎国 |
大连理工大学 汽车工程学院, 大连 |
| 胡平 |
大连理工大学 汽车工程学院, 大连 |
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| Abstract: |
| A dislocation density based crystal plasticity method is applied with the eigen-strain-based homogenization to investigate the thermo-mechanical responses in titanium alloys.The objective of our study is to devise a computational model that could efficiently track and predict the crack initiation at both micro- and structural-scale.First,the proposed model is compared with the classical crystal plasticity finite element method,which shows its improvement of efficiency while retaining the accuracy in describing the response at micro-scale.Second,the parameters are obtained within the physical range and the error between simulation and experiment is treated as the optimization objective for the calibration.Finally,a structural-scale simulation shows that the proposed model can pinpoint the potential crack initiation sites throughout the structure and at grain level accuracy. |