Micromechanics based fatigue life prediction of a polycrystalline metal applying crystal plasticity

doi:10.1016/j.mechmat.2015.01.020

IMECH-IR > 非线性力学国家重点实验室

	Micromechanics based fatigue life prediction of a polycrystalline metal applying crystal plasticity
其他题名	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.
发表期刊	MECHANICS OF MATERIALS
	2015-06
卷号	85 页码:16-37
ISSN	0167-6636
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.
关键词	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
收录类别	SCI ; EI
语种	英语
WOS记录号	WOS:000353095600003
关键词[WOS]	LOW-CYCLE FATIGUE ; EFFECTIVE ELASTOPLASTIC BEHAVIOR ; MATRIX COMPOSITES ; CRACK NUCLEATION ; INTEGRATION ALGORITHM ; SINGLE-CRYSTALS ; STRAIN ; MICROSTRUCTURE ; DEFORMATION ; MODEL
WOS研究方向	Materials Science ; Mechanics
WOS类目	Materials Science, Multidisciplinary ; Mechanics
项目资助者	National Natural Scientific Foundation of China [90815001, 11072064, 11272094, 11472085] ; Key Project of Guangxi Science and Technology Lab Center [LGZX201101]
课题组名称	LNM材料的分子/细观统计力学行为
论文分区	一类
引用统计	被引频次：68[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://dspace.imech.ac.cn/handle/311007/49983
专题	非线性力学国家重点实验室
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.
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,&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.

条目包含的文件		下载所有文件
文件名称/大小	文献类型	版本类型	开放类型	使用许可
IMCAS-J2015-090.pdf（6304KB）			开放获取	CC BY-ND	浏览下载