Microstructural fracture mechanics in high-cycle fatigue
- Univ. of Sheffield (United Kingdom). Dept. of Mechanical Engineering
- ETSII, Sevilla (Spain). Dept. De Ingenieria Mecanica
Microstructural Fracture Mechanics principles are used to develop a model of crack growth in long life fatigue. In its simplest form microstructural modelling considers the material as a polycrystal of uniform grain size D, with a crack system divided into three zones: the crack, the plastic zone and the microstructural barrier zone. The solution of the equilibrium equation allows for the calculation of the stresses sustained by the crack wake, plastic zone, barrier zone and elastic enclave, and the crack tip plastic displacement {phi}. Crack growth rate is calculated through a Paris type relationship in terms of {phi}, i.e., da/dN = C{phi}{sup n}. Conditions for crack arrest and instability are established.
- OSTI ID:
- 293063
- Report Number(s):
- CONF-970980-; ISBN 0-87339-382-1; TRN: IM9902%%94
- Resource Relation:
- Conference: Materials Week `97, Indianapolis, IN (United States), 14-18 Sep 1997; Other Information: PBD: 1997; Related Information: Is Part Of High cycle fatigue of structural materials. Proceedings; Soboyejo, W.O. [ed.] [Ohio State Univ., Columbus, OH (United States). Dept. of Materials Science and Engineering]; Srivatsan, T.S. [ed.] [Univ. of Akron, OH (United States). Dept. of Mechanical Engineering]; PB: 618 p.
- Country of Publication:
- United States
- Language:
- English
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