Interaction between a notch and cylindrical voids in aluminum single crystals: Experimental observations and numerical simulations

Biswas, P and Narasimhan, R and Kumar, AM (2013) Interaction between a notch and cylindrical voids in aluminum single crystals: Experimental observations and numerical simulations. In: JOURNAL OF THE MECHANICS AND PHYSICS OF SOLIDS, 61 (4). pp. 1027-1046.

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Abstract

A combined 3D finite element simulation and experimental study of interaction between a notch and cylindrical voids ahead of it in single edge notch (tension) aluminum single crystal specimens is undertaken in this work. Two lattice orientations are considered in which the notch front is parallel to the crystallographic 10 (1) over bar] direction. The flat surface of the notch coincides with the (010) plane in one orientation and with the (1 (1) over bar1) plane in the other. Three equally spaced cylindrical voids are placed directly ahead of the notch tip. The predicted load-displacement curves, slip traces, lattice rotation and void growth from the finite element analysis are found to be in good agreement with the experimental observations for both the orientations. Finite element results show considerable through-thickness variation in both hydrostatic stress and equivalent plastic slip which, however, depends additionally on the lattice orientation. The through-thickness variation in the above quantities affects the void growth rate and causes it to differ from the center-plane to the free surface of the specimen. (c) 2012 Elsevier Ltd. All rights reserved.

Item Type:	Journal Article
Publication:	JOURNAL OF THE MECHANICS AND PHYSICS OF SOLIDS
Publisher:	PERGAMON-ELSEVIER SCIENCE LTD
Additional Information:	Copyright for this article belongs to the PERGAMON-ELSEVIER SCIENCE LTD, ENGLAND.
Keywords:	FCC single crystal; Void growth; Ductile fracture; Lattice rotation; Finite element analysis
Department/Centre:	Division of Mechanical Sciences > Mechanical Engineering
Date Deposited:	29 Apr 2013 11:57
Last Modified:	29 Apr 2013 11:57
URI:	http://eprints.iisc.ac.in/id/eprint/46458

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