The Sharp Indentation for Identifying Constitutive Relationship of Metallic Materials

Abstract:

Based on a series of tests and elastic-plastic contact finite element analyses, a sharp indentation method for predicting the constitutive relationship of metallic materials was presented. Dependent on the dimensionless linear relationship which is independent of the hardening index n, a forecasting formula of constitutive parameters can be gotten and its form is much terser. The test results and finite element calculations show that, the predicted stress-strain curves are in agreement with the uniaxial tensile test results. The validity and precision of this method was certified by in-dentation tests on kinds of different materials.

• Periodical: Applied Mechanics and Materials (Volumes 117-119)
• Pages: 101-107
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.117-119.101
• Online since: October 2011
• Authors: Bo Yao, Li Xun Cai, Chen Bao
• Keywords: 1Gr18Ni9 Steel, Characteristic Strain, Characteristic Stress, Conical Indenter, Finite Element Analysis (FEA), Indentation Test, T225NG Alloy

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