Abstmct-A kin~ati~ly simple model for dynamic fracture of a tapered fiber-reinforced double cantilever beam is discussed. The model requires tire solution of the wave equation with a variable coefficient on a timedependent domain. Tire case of parabolic tapering is treated in clos,-d form, for a tim
Dynamic fracture of idealized fiber-reinforced materials
β Scribed by Luke F. Mannion; A. C. Pipkin
- Publisher
- Springer Netherlands
- Year
- 1983
- Tongue
- English
- Weight
- 724 KB
- Volume
- 13
- Category
- Article
- ISSN
- 0374-3535
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β¦ Synopsis
Dynamic plane stress of sheets composed of two orthogonal families of inextensible fibers, with infinitesimal elastic shearing stress response, is considered. The fibers through the tip of a propagating tear or crack carry finite forces. Fracture criteria that can be expressed in terms of these tip forces are discussed. In a particular example it is shown that the maximum energy release rate criterion leads to a circular crack trajectory, while the so-called critical force and critical stress criteria imply that the crack is L-shaped, like cracks or tears in real fibrous materials.
R6sum6
On consid~re la dynamique des contraintes de plaques planes compos~es de deux families orthogonales de fibres inextensibles et ayant une response elastique au cisaillement. Les fibres en fin d'allongement ou de fracture supportent des forces finies. Differentes possibilitbs de crit~res de fractures en terme de ces forces sont etudi~s. Dans un exemple particulier on montre que le crit~re de liberation maximale d'energie conduit une propagation de fracture circulaire, alors que le crit~re des forces et contraintes critiques conduit a une fracture en forme de L comme c'est le cas pour les materiaux reels constitu~s de fibres.
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