A numerical study of T-stress in dynamically loaded fracture specimens

Jayadevan, K. R. ; Narasimhan, R. ; Ramamurthy, T. S. ; Dattaguru, B. (2001) A numerical study of T-stress in dynamically loaded fracture specimens International Journal of Solids and Structures, 38 (28-29). pp. 4987-5005. ISSN 0020-7683

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Official URL: http://linkinghub.elsevier.com/retrieve/pii/S00207...

Related URL: http://dx.doi.org/10.1016/S0020-7683(00)00323-1


The objective of this paper is to study the evolution of T-stress in dynamically loaded fracture specimens. To this end, two-dimensional plane strain, elastodynamic finite element analyses of single edge notched (tension) specimens, and three point bend specimens subjected to time varying loads are performed. The T-stress is computed using an accurate and computationally efficient domain representation of the interaction integral. The results demonstrate that dynamically loaded specimens are subjected to a large negative T-stress during the early stages of loading as compared to that under static loading. The above phenomenon can satisfactorily explain the strong elevation in the dynamic fracture toughness at high loading rates, which has been reported in numerous experimental studies.

Item Type:Article
Source:Copyright of this article belongs to Elsevier Science.
Keywords:Dynamic Loading; Dynamic Fracture Toughness; T-Stress; K-T Locus; Finite Elements
ID Code:30307
Deposited On:22 Dec 2010 09:54
Last Modified:09 Jun 2011 10:19

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