Analysis of Microindentation Unloading Curves based on Representative Strain Approach with Closed-Form Applications

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概要

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• Indentation analysis based on the representative strain offers an effective way of obtaining material elastoplastic properties from the reverse analysis of indentation load-displacement curve. In this paper, its approach is employed to analyze the unloading force-depth curves obtained from a sharp microindentation test. By using the unloading work and residual penetration depth as parameters characterizing unloading, two different formulations of representative strain/stress are proposed, respectively, with very simple functional forms. When combined with the established framework of loading curves, the plastic properties and/or elastic properties of a material can be derived in closed-form using the loading curvature, unloading work, and residual depth measured from one sharp indentation test.

• 一般社団法人 日本機械学会の論文

著者

• CHEN Xi

  Department of Civil Engineering and Engineering Mechanics, Columbia University

• Chiba Norimasa

  Department Of Mechanical Engineering National Defense Academy

• Ogasawara Nagahisa

  Department Of Mechanical Engineering And Materials Science Yokohama National University

• Chen Xi

  Department Of Chemistry And The Key Laboratory Of Analytical Sciences Of The Ministry Of Education C

• CHIBA Norimasa

  Department Mechanical Engineering, National Defense Academy

• OGASAWARA Nagahisa

  Department Mechanical Engineering, National Defense Academy

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