Micromechanics based fatigue life prediction of a polycrystalline metal applying crystal plasticity
文献类型：期刊论文
| 作者 | Zhang KS; Ju JW; Li ZH; Bai YL(白以龙) ; Brocks W
|
| 刊名 | MECHANICS OF MATERIALS
 |
| 出版日期 | 2015-06 |
| 卷号 | 85页码:16-37 |
| 通讯作者邮箱 | kszhang2002@hotmail.com |
| 关键词 | Crystal slipping Cyclic plasticity Statistical RVE model Inhomogeneous strain Symmetrical strain cycle Low-cycle fatigue life |
| ISSN号 | 0167-6636 |
| 其他题名 | MECHANICS OF MATERIALS |
| 产权排序 | [Zhang, Ke-Shi; Ju, J. Woody] Guangxi Univ, Coll Civil & Architectural Engn, Key Lab Disaster Prevent & Struct Safety, Nanning 530004, Peoples R China; [Ju, J. Woody] Univ Calif Los Angeles, Dept Civil & Environm Engn, Los Angeles, CA 90095 USA; [Li, Zhenhuan] Huazhong Univ Sci & Technol, Dept Mech, Wuhan 430074, Peoples R China; [Bai, Yi-Long] Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech LNM, Beijing 100080, Peoples R China; [Brocks, Wolfgang] Univ Kiel, Inst Mat Sci, Kiel, Germany |
| 通讯作者 | Zhang, KS (reprint author), Guangxi Univ, Coll Civil & Architectural Engn, Key Lab Disaster Prevent & Struct Safety, Nanning 530004, Peoples R China. |
| 中文摘要 | The fatigue-life of a polycrystalline superalloy under symmetrical cyclic strain controlled loading at a temperature of 650 degrees C is investigated by numerical simulations on the micro-level, focusing on the inhomogeneous evolution of plastic deformation in a polycrystalline aggregate. A methodology (Zhang et al., 2011, 2013) to predict the low-cycle fatigue life by micro-level simulations along with statistical analysis is applied following the steps: (1) A statistically representative volume element (RVE) consisting of a number of crystal grains is constructed by Voronoi tessellation. Stresses and plastic strains are calculated by a crystal plasticity model including nonlinear kinematic hardening. (2) The RVE is subjected to repeated symmetric tensile-compressive loading. (3) The inhomogeneous stress and strain fields are statistically analyzed during the load cycles. (4) Failure by LCF is strain controlled and occurs if either of the quantities, standard deviation of longitudinal strain in tensile direction, maximum or statistical average of first principal strains in the RVE at the tension peak of cyclic loading reaches a respective critical value. (5) Using the present methodology, a family of failure curves for fatigue lives under different strain amplitudes can be predicted by varying the critical values. Finally, appropriate critical values can be identified by a respective cyclic experiment with only one strain amplitude. (C) 2015 Elsevier Ltd. All rights reserved. |
| 分类号 | 一类 |
| 类目[WOS] | Materials Science, Multidisciplinary ; Mechanics |
| 研究领域[WOS] | Materials Science ; Mechanics |
| 关键词[WOS] | LOW-CYCLE FATIGUE ; EFFECTIVE ELASTOPLASTIC BEHAVIOR ; MATRIX COMPOSITES ; CRACK NUCLEATION ; INTEGRATION ALGORITHM ; SINGLE-CRYSTALS ; STRAIN ; MICROSTRUCTURE ; DEFORMATION ; MODEL |
| 收录类别 | SCI ; EI |
| 原文出处 | http://dx.doi.org/10.1016/j.mechmat.2015.01.020 |
| 语种 | 英语 |
| WOS记录号 | WOS:000353095600003 |
| 源URL | [http://dspace.imech.ac.cn/handle/311007/49983]  |
| 专题 | 力学研究所_非线性力学国家重点实验室 |
| 推荐引用方式 GB/T 7714 | Zhang KS,Ju JW,Li ZH,et al. Micromechanics based fatigue life prediction of a polycrystalline metal applying crystal plasticity[J]. MECHANICS OF MATERIALS,2015,85:16-37. |
| APA | Zhang KS,Ju JW,Li ZH,白以龙,&Brocks W.(2015).Micromechanics based fatigue life prediction of a polycrystalline metal applying crystal plasticity.MECHANICS OF MATERIALS,85,16-37. |
| MLA | Zhang KS,et al."Micromechanics based fatigue life prediction of a polycrystalline metal applying crystal plasticity".MECHANICS OF MATERIALS 85(2015):16-37. |
入库方式： OAI收割
来源：力学研究所
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