FEA OF EVALUATING MATERIAL YIELD STRENGTH AND STRAIN HARDENING EXPONENT USING A SPHERICAL INDENTATION

Acta Metall Sin

2009, Vol. 45

Issue (2): 189-194 DOI:

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FEA OF EVALUATING MATERIAL YIELD STRENGTH AND STRAIN HARDENING EXPONENT USING A SPHERICAL INDENTATION

CUI Hang; CHEN Huaining; CHEN Jing; HUANG Chunling; WU Changzhong

Institute of Metal Research; Chinese Academy of Sciences; Shenyang 110016

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CUI Hang CHEN Huaining CHEN Jing HUANG Chunling WU Changzhong. FEA OF EVALUATING MATERIAL YIELD STRENGTH AND STRAIN HARDENING EXPONENT USING A SPHERICAL INDENTATION. Acta Metall Sin, 2009, 45(2): 189-194.

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Abstract

Dimensional analysis was constructed to derive the dimensionless functions of a spherical indenter with 1 mm in diameter. The function can be used to extract the yield strength and strain hardening exponent of metal materials by means of finite element analysis. The fitting functions used to analyze materials yield strength and strain hardening exponent within the yield strains ranging from 0.00769 to 0.04 were obtained by numerical simulation. It has been validated that the prediction accuracy is enhanced and the average errors of the yield strength and strain hardening exponent are 1.6% and 12.6%, respectively.

Key words: FEA (finite element analysis) spherical indentation, yield strength strain hardening exponent dimensionless function

Received: 16 June 2008

ZTFLH:

TG146

Fund:

Supported by Science Cooperative Foundation of Chinese and Russian Governments (No.20070634)

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https://www.ams.org.cn/EN/ OR https://www.ams.org.cn/EN/Y2009/V45/I2/189

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