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http://dx.doi.org/10.3795/KSME-A.2008.32.1.021

Mathematical Expressions for Stress-Strain Curve of Metallic Material  

Hyun, Hong-Chul (서강대학교 대학원)
Lee, Jin-Haeng (서강대학교 대학원)
Lee, Hyung-Yil (서강대학교 기계공학과)
Publication Information
Transactions of the Korean Society of Mechanical Engineers A / v.32, no.1, 2008 , pp. 21-28 More about this Journal
Abstract
Stress-strain curves based on Ramberg-Osgood and Hollomon relations are strongly dependent upon the regressed range of strain. This work investigates mathematical expressions of true stress-strain curves of metallic materials. We first observe the variation of yield strength, strain hardening exponent and stress-strain curve with regressed range of stain. Based on sectional regression and expression using one or two parameters, we propose an optimal strain range for which yield strength and nonlinear material behavior are quite appropriate.
Keywords
Stress-Strain Curve; Yield Strength; Strain Hardening Exponent; Hollomon Relation; Piecewise Power Law;
Citations & Related Records

Times Cited By SCOPUS : 5
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