Topic
Indentation
About: Indentation is a research topic. Over the lifetime, 13002 publications have been published within this topic receiving 340476 citations.
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TL;DR: In this paper, the authors report on the mechanical characterization of thin hard films deposited on softer substrates using the micro-indentation technique together with spherically tipped indenters.
115 citations
TL;DR: In this article, the main formulae of the JKR theory of adhesion are extended to any material with rotational symmetry of the elastic properties and the BG method introduced for extracting adhesive and elastic properties of isotropic elastic materials from depth-sensing diagrams of spherical indenters is described.
Abstract: Connections between the Hertz-type contact problems and depth-sensing indentation of materials are studied. Formulations of Hertz-type contact problems with various boundary conditions within the contact area are discussed in detail. The problems under investigations can be subdivided into two large groups: self-similar problems for anisotropic materials with various rheological properties and adhesive contact problems for arbitrary bodies of revolution or for power-law shaped blunt indenters. Specific features of indentation problems are described and the common methods for extracting elastic and adhesive properties of materials are briefly reviewed. The basic formulae are extended to the case of nonslipping boundary conditions between a probe and the material. The main formulae of the JKR theory of adhesion are extended to any material with rotational symmetry of the elastic properties. These materials include not only isotropic or transversely isotropic elastic solids but also homogeneously prestressed isotropic or transversely isotropic nonlinear elastic materials. The BG method introduced for extracting adhesive and elastic properties of isotropic elastic materials from depth-sensing diagrams of spherical indenters, is described and extended to linear or linearized materials with rotational symmetry of the elastic properties.
114 citations
01 Jan 1979
114 citations
TL;DR: In this article, the authors studied spherical indentation based on numerical analysis and experiment, to develop robust testing techniques to evaluate isotropic elastic-plastic material properties of metals, where the representative stress and plastic strain concept is critically investigated via finite element analysis, and some conditions for the representative values are suggested.
114 citations
TL;DR: In this article, the Oliver-Pharr method was used to calculate the elastic modulus from the reloading curve and was compared to the traditional unloading curve method, which was applied to load-unload-reload -unload, multistep, and cycle indentation testing procedures at various hold times and force rates.
114 citations