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Finite element simulation of ring expansion and fragmentation: The capturing of length and time scales through cohesive models of fracture

Pandolfi, A. and Krysl, P. and Ortiz, M. (1999) Finite element simulation of ring expansion and fragmentation: The capturing of length and time scales through cohesive models of fracture. International Journal of Fracture, 95 (1/4). pp. 279-297. ISSN 0376-9429. doi:10.1023/A:1018672922734.

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The expanding ring test of Grady and Benson (1983) is taken as a convenient yet challenging validation problem for assessing the fidelity of cohesive models in situations involving ductile dynamical fracture. Attention has been restricted to 1100-0 aluminum samples. Fracture has been modelled by recourse to an irreversible cohesive law embedded into cohesive elements. The finite element model is three-dimensional and fully Lagrangian. In order to limit the extent of deformation-induced distortion, we resort to continuous adaptive remeshing. The cohesive behavior of the material is assumed to be rate independent and, consequently, all rate effects predicted by the calculations are due to inertia and the rate dependency in plastic deformation. The numerical simulations are revealed to be highly predictive of a number of observed features, including: the number of dominant and arrested necks; the fragmentation patterns; the dependence of the number of fragments and the fracture strain on the expansion speed; and the distribution of fragment sizes at fixed expansion speed.

Item Type:Article
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URLURL TypeDescription ReadCube access
Pandolfi, A.0000-0002-7084-7456
Ortiz, M.0000-0001-5877-4824
Additional Information:© Kluwer Academic Publishers 1999. Received 11 September 1998; accepted in revised form 18 December 1998. AP and MO gratefully acknowledge support from the Office of Naval Research through grant N00014-95-1-0453. PK and MO are grateful for support from the Department of Energy through Caltech’s ASCI Center of Excellence for Simulating Dynamic Response of Materials. MO also wishes to gratefully acknowledge the support of the Army Research Office through grant DAAH04-96-1-0056.
Funding AgencyGrant Number
Office of Naval Research (ONR)N00014-95-1-0453
Department of Energy (DOE)UNSPECIFIED
Army Research Office (ARO)DAAH04-96-1-0056
Issue or Number:1/4
Record Number:CaltechAUTHORS:20171213-091247239
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Official Citation:Pandolfi, A., Krysl, P. & Ortiz, M. International Journal of Fracture (1999) 95: 279.
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:83860
Deposited By: Lydia Suarez
Deposited On:13 Dec 2017 23:00
Last Modified:15 Nov 2021 20:14

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