Deformation field evolution in indentation of a porous brittle solid

Yadav, Shwetabh and Saldana, Christopher and Murthy, Tejas G (2015) Deformation field evolution in indentation of a porous brittle solid. In: INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES, 66 . pp. 35-45.

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Abstract

An experimental study of plane strain wedge indentation of a model porous brittle solid has been made to understand the effect of indentation parameters on the evolution of the deformation field and the accompanying volume change. A series of high-speed, high-resolution images of the indentation region and simultaneous measurements of load response were captured through the progression of the indentation process. Particle image velocimetry analysis of the images facilitated in situ measurement of the evolution of the resulting plastic zone in terms of incremental material displacement (velocity), strain rate, strain and volume change (e.g., local pore collapse). These measurements revealed initiation and propagation of flow localizations and fractures, as well as enabled estimate of volume changes occurring in the deformation zone. The results were directly compared with theoretical estimates of indentation pressure and deformation zone geometry and were used to validate a modified cavity expansion solution that incorporates effects of volume changes in the plastic zone. (C) 2015 Elsevier Ltd. All rights reserved.

Item Type:	Journal Article
Publication:	INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES
Publisher:	PERGAMON-ELSEVIER SCIENCE LTD
Additional Information:	Copy right for this article belongs to the PERGAMON-ELSEVIER SCIENCE LTD, THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND
Keywords:	Indentation; Porous solids; Deformation; Image analysis
Department/Centre:	Division of Mechanical Sciences > Civil Engineering
Date Deposited:	11 Aug 2015 06:33
Last Modified:	11 Aug 2015 06:33
URI:	http://eprints.iisc.ac.in/id/eprint/52055

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