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A viscoplastic constitutive model for dynamic fracture

โœ Scribed by C.V. Ramakrishnan; D.R.J. Owen; O.C. Zienkiewicz

Publisher
Elsevier Science
Year
1986
Tongue
English
Weight
920 KB
Volume
23
Category
Article
ISSN
0013-7944

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โœฆ Synopsis

The use of a viscoplastic approach to dynamic fracture prediction is proposed with the aim of producing a model which is applicable to ductile situations. A numerical (finiteelement) approach is adopted with specially developed joint elements being used to simulate behaviour within the fracture-process zone. Results are presented for an expanding edge-crack problem. Experimental results are used to calibrate the numerical model by determining the material-specimen parameters under dynamic-fracturing conditions. Detailed results are presented for both LEFM and nonlinear fracture-mechanics approaches.

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