Mathematical Expressions for Stress-Strain Curve of Metallic Material

금속재료 응력-변형률 곡선의 수학적 표현들

  • Published : 2008.01.01


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.


Stress-Strain Curve;Yield Strength;Strain Hardening Exponent;Hollomon Relation;Piecewise Power Law


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