| Micromechanics based fatigue life prediction of a polycrystalline metal applying crystal plasticity | |
| Alternative Title | MECHANICS OF MATERIALS |
Zhang KS; Ju JW; Li ZH; Bai YL(白以龙) ; Brocks W; Zhang, KS (reprint author), Guangxi Univ, Coll Civil & Architectural Engn, Key Lab Disaster Prevent & Struct Safety, Nanning 530004, Peoples R China.
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| Source Publication | MECHANICS OF MATERIALS
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| 2015-06 | |
| Volume | 85Pages:16-37 |
| ISSN | 0167-6636 |
| Abstract | 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. |
| Keyword | Crystal Slipping Cyclic Plasticity Statistical Rve Model Inhomogeneous Strain Symmetrical Strain Cycle Low-cycle Fatigue Life |
| DOI | 10.1016/j.mechmat.2015.01.020 |
| URL | 查看原文 |
| Indexed By | SCI ; EI |
| Language | 英语 |
| WOS ID | WOS:000353095600003 |
| WOS Keyword | LOW-CYCLE FATIGUE ; EFFECTIVE ELASTOPLASTIC BEHAVIOR ; MATRIX COMPOSITES ; CRACK NUCLEATION ; INTEGRATION ALGORITHM ; SINGLE-CRYSTALS ; STRAIN ; MICROSTRUCTURE ; DEFORMATION ; MODEL |
| WOS Research Area | Materials Science ; Mechanics |
| WOS Subject | Materials Science, Multidisciplinary ; Mechanics |
| Funding Organization | National Natural Scientific Foundation of China [90815001, 11072064, 11272094, 11472085] ; Key Project of Guangxi Science and Technology Lab Center [LGZX201101] |
| Department | LNM材料的分子/细观统计力学行为 |
| Classification | 一类 |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://dspace.imech.ac.cn/handle/311007/49983 |
| Collection | 非线性力学国家重点实验室 |
| Corresponding Author | Zhang, KS (reprint author), Guangxi Univ, Coll Civil & Architectural Engn, Key Lab Disaster Prevent & Struct Safety, Nanning 530004, Peoples R China. |
| Recommended Citation 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,&Zhang, KS .(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. |
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| IMCAS-J2015-090.pdf（6304KB） | 开放获取 | CC BY-ND | View Download | |||
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