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On the Extent of Dominance of Asymptotic Elastodynamic Crack-tip Fields: Part II - Numerical Investigation of Three Dimensional and Transient Effects

Krishnaswamy, Sridhav and Rosakis, Ares J. and Ravichandran, G. (1991) On the Extent of Dominance of Asymptotic Elastodynamic Crack-tip Fields: Part II - Numerical Investigation of Three Dimensional and Transient Effects. Journal of Applied Mechanics, 58 (1). pp. 95-103. ISSN 0021-8936. http://resolver.caltech.edu/CaltechAUTHORS:20150225-160203923

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Abstract

In Part I of this paper, the question of the extent of dominance of the mode I asymptotic elastodynamic crack-tip field (the K d I -field) was studied experimentally. Here, the results of two and three-dimensional elastodynamic finite element simulations of the drop-weight experiments are reported. The load records as obtained from the impact hammer and supports of the drop-weight loading device were used as boundary tractions in the numerical simulations. For the laboratory specimen studied, the results of the simulations indicate that the asymptotic elastodynamic field is not an adequate description of the actual fields prevailing over any sizeable region around the crack tip. This confirms the experimental results of Part I which showed that three-dimensional and transient effects necessarily have to be taken into account for valid interpretation of experimental results.


Item Type:Article
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http://dx.doi.org/10.1115/1.2897185 DOIArticle
http://appliedmechanics.asmedigitalcollection.asme.org/article.aspx?articleid=1410310PublisherArticle
Additional Information:© 1991 by The American Society of Mechanical Engineers. Contributed by the Applied Mechanics Division of The American Society of Mechanical Engineers for publication in the Journal of Applied Mechanics. The authors would like to thank Prof. M. Ortiz for providing a version of the finite element program, FEAP. Support of the Office of Naval Research through contract N00014-85-K- 0599 is gratefully acknowledged, The computations were performed using the facilities of the San Diego Supercomputer Center and were made possible through an NSF-PYI grant MSM-84-51204 to the second author.
Group:GALCIT
Funders:
Funding AgencyGrant Number
Office of Naval Research (ONR)N00014-85-K-0599
NSF PYIMSM-84-51204
Record Number:CaltechAUTHORS:20150225-160203923
Persistent URL:http://resolver.caltech.edu/CaltechAUTHORS:20150225-160203923
Official Citation:Krishnaswamy Sridhav, Rosakis Ares J., Ravichandran G. On the Extent of Dominance of Asymptotic Elastodynamic Crack-Tip Fields: Part II—Numerical Investigation of Three-Dimensional and Transient Effects J. Appl. Mech. 58(1), 95-103 (1991) (9 pages); doi:10.1115/1.2897185
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:55220
Collection:CaltechAUTHORS
Deposited By: Cheryl Gause
Deposited On:04 Mar 2015 18:58
Last Modified:29 Sep 2016 23:40

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