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Analysis of spherical indentation of materials with plastically graded surface layer
Yuan FP(袁福平); Jiang P(姜萍); Xie JJ(谢季佳); Wu XL(武晓雷); Yuan, FP; Chinese Acad Sci, State Key Lab Nonlinear Mech, Inst Mech, Beijing 100190, Peoples R China.
Source PublicationINTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES
2012-02-01
Volume49Issue:3-4Pages:527-536
ISSN0020-7683
AbstractIn the present work, a comprehensive parametric study for establishing contact mechanics of instrumented normal spherical indentation on homogeneous materials and materials with plastically graded surface layer (PGSL) was undertaken by dimensional analysis and finite element modeling. The spherical indentation response for homogeneous materials can be described only by two dimensionless parameters: strain hardening exponent and a unified parameter that can describe effects of both the normalized yield strength and the normalized indentation depth. The influences of these two parameters were investigated for a wide range of engineering materials, and the results may be used as an estimate of loading response and pile-up/sink-in behavior when the material properties are known. In the materials with PGSL, a linear gradient in yield strength, and no variation in elastic modulus and strain hardening exponent were explored. The indentation response of the materials with PGSL can be described only by three dimensionless parameters: the normalized indentation depth, the dimensionless strength gradient parameter, and the normalized PGSL thickness. The effects of these three parameters were studied systematically. The normalized pile-up/sink-in parameter is found to be an increasing function of the strength gradient parameter. The normalized pile-up/sink-in parameter increases (decreases) with increasing PGSL thickness for a fixed positive (negative) gradient case at large indentation depth. The results also indicate that the materials with positive PGSL can bear more loads and have significantly more resistance to contact crack formation.
KeywordSpherical Indentation Plastically Graded Materials Contact Dimensional Analysis Finite Element Modeling Mechanical Attrition Treatment Instrumented Indentation Stainless-steel Elastic Properties Pile-up Gradients Solids Depth Nanocrystallization Resistance
Subject Area冲击动力学
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Indexed BySCI ; EI
Language英语
WOS IDWOS:000300743800011
Funding OrganizationThe authors would like to acknowledge the financial support of NSFC (Grants Nos. 11002151 and 11072243), 973 Project of China (No. 2010CB631004) and Knowledge Innovation Program of Chinese Academy of Sciences (No. KJCX2-EW-L03).
DepartmentLNM材料介观力学性能的表征
Classification一类/力学重要期刊
Citation statistics
Cited Times:9[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://dspace.imech.ac.cn/handle/311007/46669
Collection非线性力学国家重点实验室
Corresponding AuthorYuan, FP; Chinese Acad Sci, State Key Lab Nonlinear Mech, Inst Mech, Beijing 100190, Peoples R China.
Recommended Citation
GB/T 7714
Yuan FP,Jiang P,Xie JJ,et al. Analysis of spherical indentation of materials with plastically graded surface layer[J]. INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES,2012,49(3-4):527-536.
APA 袁福平,姜萍,谢季佳,武晓雷,Yuan, FP,&Chinese Acad Sci, State Key Lab Nonlinear Mech, Inst Mech, Beijing 100190, Peoples R China..(2012).Analysis of spherical indentation of materials with plastically graded surface layer.INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES,49(3-4),527-536.
MLA 袁福平,et al."Analysis of spherical indentation of materials with plastically graded surface layer".INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES 49.3-4(2012):527-536.
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