Brittleness, ductility, and the Griffith crack
- Institute for Theoretical Physics, University of California, Santa Barbara, California 93106 (United States)
The material properties which determine whether a solid will fail by brittle fracture or ductile deformation are theoretically investigated by including the leading-order dissipative term describing plastic flow in the equations of elasticity. In particular, this term yields a time scale for the blunting of the elastic crack tip described by Griffith. This time scale is compared to the elastic response time of a solid to determine whether the solid will sustain the high stresses characteristic of a crack tip or will plastically relax the elastic strains. These dissipative equations of elasticity also describe the {open_quotes}work-hardened{close_quotes} state of a solid, where brittle fracture becomes possible in an originally ductile solid. {copyright} {ital 1997} {ital The American Physical Society}
- OSTI ID:
- 530146
- Journal Information:
- Physical Review. E, Statistical Physics, Plasmas, Fluids, and Related Interdisciplinary Topics, Journal Name: Physical Review. E, Statistical Physics, Plasmas, Fluids, and Related Interdisciplinary Topics Journal Issue: 6 Vol. 55; ISSN PLEEE8; ISSN 1063-651X
- Country of Publication:
- United States
- Language:
- English
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