Identification of Young's Modulus from Indentation Testing and Inverse Analysis

• PROU Joris

  Tokyo Institute of Technology, Department of Mechanical Sciences and Engineering

• KISHIMOTO Kikuo

  Tokyo Institute of Technology, Department of Mechanical Sciences and Engineering

• CONSTANTINESCU Andrei

  École Polytechnique, Laboratoire de Mécanique des Solides (CNRS UMR 7649)

Abstract

In this study, a numerical method for the identification of the Young's modulus of linear elastic coated materials from continuous indentation test is first presented. The identification is based on an inverse analysis where the minimization of a cost functional is performed by a gradient descent algorithm. The main result is the computation of cost function gradient by using a direct differentiation technique, resulting in a time-saving method compared to the widely used finite difference method. The validity and illustration of this approach is shown through several numerical examples. The second part of this article is dedicated to the identification of elasto-plastic thin films Young's modulus. A new method is proposed, where the inverse analysis relies only on finite element computations for elastic materials.

Journal

• Journal of Solid Mechanics and Materials Engineering

  Journal of Solid Mechanics and Materials Engineering 4 (6), 781-795, 2010

  The Japan Society of Mechanical Engineers

Keywords

• Indentation
• Thin Films
• Direct Differentiation Method
• Inverse Analysis

Details

• CRID: 1390282680240953728
• NII Article ID: 130000302040
• DOI: 10.1299/jmmp.4.781
• ISSN: 18809871
• Web Site: http://www.jstage.jst.go.jp/article/jmmp/4/6/4_6_781/_pdf
• Text Lang: en
• Data Source:
  • JaLC
  • Crossref
  • CiNii Articles
• Abstract License Flag: Disallowed