基于锥形压入的材料力学性能测试方法研究

doi:10.7527/S1000-6893.2013.0065

Abstract

Abstract:

It is of considerable engineering significance to obtain parameters of uniaxial material constitutive relationships by using an indentation method for in-service engineering components,small dimensional components and welding structure materials,and it is useful to estimate the indentation hardness parameters of a material by its constitutive relationship. Based on the theory of indentation tests and elastic-plastic finite element analysis (EPFEA) with contact elements, a linear relationship between the energy ratios and yield stresses is obtained, and a cone indenter test method named constitutive relationship based on the energy method of indentation (CR-EMI) is presented to predict such key parameters of constitutive relationships of metallic materials as elastic modulus, yield stress and hardening index. Furthermore, a method is given named hardness based on energy method of indentation (H-EMI) based on the Hollomon constitutive model to forecast the hardness. The validity and accuracy of the CR-EMI method and the H-EMI method are proved by the indentation tests and finite element analyses of several metals.

Key words: cone-shape indenter, characterization stress, finite element analysis, indentation test, constitutive relationship based on the energy method of indentation, hardness based on energy method of indentation

CLC Number:

V252

YAO Bo, CAI Lixun, BAO Chen. Research on Acquisition of Mechanical Properties of Materials Based on Conical Indentation[J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2013, 34(8): 1874-1883.

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Research on Acquisition of Mechanical Properties of Materials Based on Conical Indentation

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