Abstract
The role of nonlinear rate-dependent effects in the interpolation of crack run-arrest events in ductile materials is being investigated by the Heavy-Section Steel Technology (HSST) program through development and applications of viscoplastic-dynamic finite element analysis techniques. This paper describes studies where various viscoplastic constitutive models and several proposed nonlinear fracture criteria are being installed in general purpose (ADINA) and special purpose (VISCRK) finite element computer programs. The models implemented in these computer programs include the Bodner-Partom and the Perzyna viscoplastic formulations; the proposed fracture criteria include three parameters that are based on energy principles. The predictive capabilities of the nonlinear techniques are evaluated through applications to a series of HSST wide-plate crack-arrest tests. To assess the impact of including viscoplastic effects in the computational models, values of fracture parameters calculated in elastodynamic and in viscoplastic-dynamic analyses are compared for a large wide-plate test. Plans are reviewed for additional computational and experimental studies to assess the utility of viscoplastic analysis techniques in constructing a dynamic inelastic fracture mechanics model for ductile steels.
| Original language | English |
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| Pages | 127-136 |
| Number of pages | 10 |
| Publication status | Published - 1988 |
| Externally published | Yes |
| Event | Computers in Engineering 1988 - Proceedings - San Francisco, CA, USA Duration: 31 Jul 1988 → 4 Aug 1988 |
Conference
| Conference | Computers in Engineering 1988 - Proceedings |
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| City | San Francisco, CA, USA |
| Period | 31/07/88 → 4/08/88 |