A generalized load-penetration relation for sharp indenters and the indentation size effect

• Autores: Z.Y. Li, H.T. Yang, S. Chandrasekar
• Localización: Journal of applied mechanics, ISSN 0021-8936, Vol. 69, Nº. 3, 2002, págs. 394-396
• Idioma: inglés
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• Resumen

  • A dimensional analysis has been made of elastic-plastic indentation of an anisotropic solid, and of a solid showing pressure-sensitive yield behavior. It is found that, P2, for indentation with sharp, self-similar indenters, where P is the load applied by the indenter and is the corresponding distance of penetration of the indenter into the solid. This extends and generalizes a similar result obtained for isotropic solids showing conventional plastic behavior. When a strain-gradient plasticity is incorporated into the material model, then it is found that P is no longer proportional to 2. Implications of the results for the indentation size-effect and for the determination of stress-strain curves from indentation are discussed. ©2002 ASME