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Micromechanics based fatigue life prediction of a polycrystalline metal applying crystal plasticity
Alternative TitleMECHANICS 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.
Source PublicationMECHANICS OF MATERIALS
2015-06
Volume85Pages:16-37
ISSN0167-6636
AbstractThe 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.
KeywordCrystal Slipping Cyclic Plasticity Statistical Rve Model Inhomogeneous Strain Symmetrical Strain Cycle Low-cycle Fatigue Life
DOI10.1016/j.mechmat.2015.01.020
URL查看原文
Indexed BySCI ; EI
Language英语
WOS IDWOS:000353095600003
WOS KeywordLOW-CYCLE FATIGUE ; EFFECTIVE ELASTOPLASTIC BEHAVIOR ; MATRIX COMPOSITES ; CRACK NUCLEATION ; INTEGRATION ALGORITHM ; SINGLE-CRYSTALS ; STRAIN ; MICROSTRUCTURE ; DEFORMATION ; MODEL
WOS Research AreaMaterials Science ; Mechanics
WOS SubjectMaterials Science, Multidisciplinary ; Mechanics
Funding OrganizationNational Natural Scientific Foundation of China [90815001, 11072064, 11272094, 11472085] ; Key Project of Guangxi Science and Technology Lab Center [LGZX201101]
DepartmentLNM材料的分子/细观统计力学行为
Classification一类
Citation statistics
Cited Times:30[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://dspace.imech.ac.cn/handle/311007/49983
Collection非线性力学国家重点实验室
Corresponding AuthorZhang, 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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