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Full Field Measurements of the Dynamic Deformation Field Around a Growing Adiabatic Shear Band at the Tip of a Dynamically Loaded Notch

Mason, James J. and Rosakis, Ares J. and Ravichandran, G. (1994) Full Field Measurements of the Dynamic Deformation Field Around a Growing Adiabatic Shear Band at the Tip of a Dynamically Loaded Notch. Journal of the Mechanics and Physics of Solids, 42 (11). pp. 1679-1697. ISSN 0022-5096. http://resolver.caltech.edu/CaltechAUTHORS:20150225-164037543

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Abstract

The method of Coherent Gradient Sensing (CGS) is used to record the deformation field around an adiabatic shear band emanating from a pre-crack tip in C-300 steel loaded dynamically in mode II. At early times after impact, the resulting fringe pattern surrounding the shear band seems to exhibit the deformation characteristics of a mode II Dugdale plastic zone evolving under small-scale yielding conditions and, as a result, the experimental fringe patterns are fitted to the theoretical Dugdale crack deformation field by using a least squares fitting scheme. This results in values for the shear band length and the average shear stress acting on the shear band as functions of time. The shear band is observed to initiate when K^d_(11)(t) = 140 MPa√m and subsequently propagate with an average speed of 320 m s^(−1). The average shear stress on the shear band decreases from 1.6 GPa at initiation to 1.3 GPa during the later stages of propagation.


Item Type:Article
Related URLs:
URLURL TypeDescription
http://dx.doi.org/10.1016/0022-5096(94)90067-1 DOIArticle
http://www.sciencedirect.com/science/article/pii/0022509694900671PublisherArticle
Additional Information:© 1994 Elsevier Science Ltd. Received 18 March 1994; in revised form 6 July 1994. The on-going support of the Army Research Office under grant no. DAAH04-93-G0037 and the support of the Office of Naval Research under grant no. N00014-90-J-1340 are greatly appreciated.
Group:GALCIT
Funders:
Funding AgencyGrant Number
Army Research Office (ARO)DAAH04-93-G0037
Office of Naval Research (ONR)N00014-90-J-1340
Record Number:CaltechAUTHORS:20150225-164037543
Persistent URL:http://resolver.caltech.edu/CaltechAUTHORS:20150225-164037543
Official Citation:James J. Mason, Ares J. Rosakis, G. Ravichandran, Full field measurements of the dynamic deformation field around a growing adiabatic shear band at the tip of a dynamically loaded crack or notch, Journal of the Mechanics and Physics of Solids, Volume 42, Issue 11, November 1994, Pages 1679-1697, ISSN 0022-5096, http://dx.doi.org/10.1016/0022-5096(94)90067-1. (http://www.sciencedirect.com/science/article/pii/0022509694900671)
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:55231
Collection:CaltechAUTHORS
Deposited By: Cheryl Gause
Deposited On:27 Feb 2015 01:17
Last Modified:29 Sep 2016 23:38

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