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Book ChapterDOI

A crack-closure model for predicting fatigue crack growth under aircraft spectrum loading

TLDR
In this article, the development and application of an analytical model of cycle crack growth is presented that includes the effects of crack closure, and the model is used to correlate crack growth rates under constant amplitude loading and to predict crack growth under aircraft spectrum loading on 2219-T851 aluminum alloy sheet material.
Abstract
The development and application of an analytical model of cycle crack growth is presented that includes the effects of crack closure. The model was used to correlate crack growth rates under constant amplitude loading and to predict crack growth under aircraft spectrum loading on 2219-T851 aluminum alloy sheet material. The predicted crack growth lives agreed well with experimental data. The ratio of predicted to experimental lives ranged from 0.66 to 1.48. These predictions were made using data from an ASTM E24.06.01 Round Robin.

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Journal ArticleDOI

Cumulative fatigue damage and life prediction theories: a survey of the state of the art for homogeneous materials

TL;DR: A comprehensive review of cumulative fatigue damage theories for metals and their alloys, emphasizing the approaches developed between the early 1970s to the early 1990s, can be found in this paper, where the authors grouped these theories into six categories: linear damage rules, nonlinear damage curve and two-stage linearization approaches; life curve modification methods; approaches based on crack growth concepts; continuum damage mechanics models; and energy-based theories.
Journal ArticleDOI

A crack opening stress equation for fatigue crack growth

TL;DR: In this paper, a general crack opening stress equation is presented which may be used to correlate crack growth rate data for various materials and thicknesses, under constant amplitude loading, once the proper constraint factor has been determined.
Journal ArticleDOI

An irreversible cohesive zone model for interface fatigue crack growth simulation

TL;DR: In this paper, the authors used an irreversible constitutive equation for the cyclic interface traction-separation behavior within the cohesive zone model (CZM) approach to study fatigue crack growth (FCG) along an interface.
Journal ArticleDOI

Fatigue of structures and materials in the 20th century and the state of the art

TL;DR: This article surveys the historical development of scientific and engineering knowledge about fatigue of materials and structures in the 20th century, including fatigue as a material phenomenon, prediction models for fatigue properties of structures, and load spectra.
Journal ArticleDOI

On the finite element analysis of fatigue crack closure—1. Basic modeling issues

TL;DR: In this article, a model for the elastic-plastic finite element simulation of fatigue crack growth and crack closure is presented and evaluated, showing that careful attention must be given to a series of critical decisions about mesh and model design if the analysis is to be reliable.