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Modified method for continuous stiffness measurement

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Abstract

This study proposes a method developed to simultaneously solve contact hardness and reduced modulus by loading and unloading coefficients together with the inclined angle of an indenter. The ratios of the applied load to the squared slopes of load–depth curves during loading and unloading processes were used to determine loading and unloading coefficients. The values of the contact area estimated by the present method were found to be precise for a variety of materials. Compared to the reduced modulus, errors due to underestimated contact area were found more significant in the evaluation of contact hardness.

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Authors and Affiliations

  1. Department of Mechanical Engineering, National Cheng Kung University, Tainan, Taiwan 701, Republic of China

    Pal Jen Wei

  2. Department of Mechanical Engineering, Center for Micro/Nano Science and Technology, and Institute of Nanotechnology and Microsystems Engineering, National Cheng Kung University, Tainan, Taiwan 701, Republic of China

    Jen Fin Lin

Authors
  1. Pal Jen Wei
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  2. Jen Fin Lin
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Correspondence to Jen Fin Lin.

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Wei, P.J., Lin, J.F. Modified method for continuous stiffness measurement. Journal of Materials Research 24, 599–606 (2009). https://doi.org/10.1557/jmr.2009.0087

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  • DOI: https://doi.org/10.1557/jmr.2009.0087

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