An Evaluation of Elber-Type Crack Retardation Models

Document Number: 2001-01-4063

Date Published: March 2001

Author(s):
Marco Antonio Meggiolaro - Pontifical Catholic University of Rio de Janeiro (PUC-
Jaime Tupiass\au Pinho de Castro - Pontifical Catholic University of Rio de Janeiro (PUC-

Abstract:
In this work, a review of plasticity-induced crack closure is presented, along with models proposed to quantify its effect on the subsequent crack growth rate. The stress state dependence of crack closure is discussed. Overload- induced retardation effects on the crack growth rate are considered, based on the crack closure idea, and improvements to the traditional models are proposed to account for crack arrest and crack acceleration after compressive underloads. Using a general-purpose fatigue design program, the models and the proposed modifications are compared with experimental results from various load spectra, and with simulated histories illustrating their main features.

File Size: 204K
Product Status: In Stock

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