ACTA AERONAUTICAET ASTRONAUTICA SINICA >
Research on Acquisition of Mechanical Properties of Materials Based on Conical Indentation
Received date: 2012-10-19
Revised date: 2012-12-31
Online published: 2013-02-20
Supported by
National Natural Science Foundation of China(11072205)
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.
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. DOI: 10.7527/S1000-6893.2013.0065
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