Computational modelling of impact damage in brittle materials

Computational modelling of impact damage in brittle materials A Lagrangian finite element method of fracture and fragmentation in brittle materials is developed. A cohesive-law fracture model is used to propagate multiple cracks along arbitrary paths. In axisymmetric calculations, radial cracking is accounted for through a continuum damage model. An explicit contact/friction algorithm is used to treat the multi-body dynamics which inevitably ensues after fragmentation. Rate-dependent plasticity, heat conduction and thermal coupling are also accounted for in calculations. The properties and predictive ability of the model are exhibited in two case studies: spall tests and dynamic crack propagation in a double cantilever beam specimen. As an example of application of the theory, we simulate the experiments of Field (1988) involving the impact of alumina plates by steel pellets at different velocities. The calculated conical, lateral and radial fracture histories are found to be in good agreement with experiment. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png International Journal of Solids and Structures Elsevier

Computational modelling of impact damage in brittle materials

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Publisher
Elsevier
Copyright
Copyright © 1996 Elsevier Ltd
ISSN
0020-7683
eISSN
1879-2146
D.O.I.
10.1016/0020-7683(95)00255-3
Publisher site
See Article on Publisher Site

Abstract

A Lagrangian finite element method of fracture and fragmentation in brittle materials is developed. A cohesive-law fracture model is used to propagate multiple cracks along arbitrary paths. In axisymmetric calculations, radial cracking is accounted for through a continuum damage model. An explicit contact/friction algorithm is used to treat the multi-body dynamics which inevitably ensues after fragmentation. Rate-dependent plasticity, heat conduction and thermal coupling are also accounted for in calculations. The properties and predictive ability of the model are exhibited in two case studies: spall tests and dynamic crack propagation in a double cantilever beam specimen. As an example of application of the theory, we simulate the experiments of Field (1988) involving the impact of alumina plates by steel pellets at different velocities. The calculated conical, lateral and radial fracture histories are found to be in good agreement with experiment.

Journal

International Journal of Solids and StructuresElsevier

Published: Aug 1, 1996

References

  • Robust, geometrically based, automatic two-dimensional mesh generation
    Baehmann, P.L.; Wittchen, S.L.; Shephard, M.S.; Grice, K.R.; Yerry, M.A.
  • Dynamic failure of solids
    Curran, D.R.; Seaman, L.; Shockey, D.A.
  • Two-dimensional mesh generation, adaptive remeshing and refinement
    Jin, H.; Wiberg, N.E.
  • Modelling and simulation of high-speed machining
    Marusich, T.D.; Ortiz, M.
  • Partitioned analysis of coupled systems
    Park, K.C.; Felippa, C.A.

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