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Numerical investigation of spherical indentation on elastic-power-law strain-hardening solids with non-equibiaxial residual stresses

Published online by Cambridge University Press:  29 January 2019

Taihua Zhang ,
Wenqiang Cheng ,
Guangjian Peng Open the ORCID record for Guangjian Peng [Opens in a new window] ,
Yi Ma ,
Weifeng Jiang ,
Jiangjiang Hu  and
Heng Chen
Taihua Zhang
Affiliation:
College of Mechanical Engineering, Zhejiang University of Technology, Hangzhou 310014, China
Wenqiang Cheng
Affiliation:
College of Mechanical Engineering, Zhejiang University of Technology, Hangzhou 310014, China
Guangjian Peng*
Affiliation:
College of Mechanical Engineering, Zhejiang University of Technology, Hangzhou 310014, China
Yi Ma
Affiliation:
College of Mechanical Engineering, Zhejiang University of Technology, Hangzhou 310014, China
Weifeng Jiang
Affiliation:
College of Mechanical Engineering, Zhejiang University of Technology, Hangzhou 310014, China
Jiangjiang Hu
Affiliation:
College of Mechanical Engineering, Zhejiang University of Technology, Hangzhou 310014, China
Heng Chen
Affiliation:
College of Mechanical Engineering, Zhejiang University of Technology, Hangzhou 310014, China
*
Address all correspondence to Guangjian Peng at [email protected]
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Abstract

The finite element simulations show that non-equibiaxial residual stresses (RS) can shift the load–depth curve from the unstressed curve and cause elliptical remnant indentation in spherical indentation. Thus the relative load change between stressed and unstressed samples and the asymmetry of elliptical remnant indentation were employed as characteristic parameters to evaluate the magnitude and directionality of RS. Through theoretical and numerical analysis, the effects of RS on indentation load and remnant impression as well as the affect mechanism were systematically discussed. Finally, two equations which could provide foundations for establishing spherical indentation method to evaluate non-equibiaxial RS were obtained.

Type
Research Letters
Information
MRS Communications , Volume 9 , Issue 1 , March 2019 , pp. 360 - 369
Copyright
Copyright © Materials Research Society 2019 

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