Fatigue crack growth under variable-amplitude loading: Part II - Code development and model validation

Asok Ray, Ravindra Patankar

Research output: Contribution to journalArticle

68 Citations (Scopus)

Abstract

A state-space model of fatigue crack growth has been formulated based on the crack closure concept in the first part of the two-part paper. The unique feature of this state-space model is that the constitutive equation for crack-opening stress is governed by a low-order non-linear difference equation without the need for storage of a long load history. Therefore, savings in the computation time and memory requirements are significant. This paper, which is the second part, provides information for code development and validates the state-space model with fatigue test data for different types of variable-amplitude and spectrum loading in 7075-T6 and 2024-T3 aluminum alloys, respectively. Predictions of the state-space model are compared with those of the FASTRAN and AFGROW codes.

Original languageEnglish (US)
Pages (from-to)995-1013
Number of pages19
JournalApplied Mathematical Modelling
Volume25
Issue number11
DOIs
StatePublished - Nov 1 2001

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Fatigue Crack Growth
Model Validation
State-space Model
Fatigue crack propagation
Crack Closure
Crack closure
Nonlinear Difference Equations
Aluminum Alloy
Difference equations
Constitutive Equation
Constitutive equations
Fatigue
Aluminum alloys
Crack
Fatigue of materials
Cracks
Data storage equipment
Prediction
Requirements

All Science Journal Classification (ASJC) codes

  • Modeling and Simulation
  • Applied Mathematics

Cite this

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abstract = "A state-space model of fatigue crack growth has been formulated based on the crack closure concept in the first part of the two-part paper. The unique feature of this state-space model is that the constitutive equation for crack-opening stress is governed by a low-order non-linear difference equation without the need for storage of a long load history. Therefore, savings in the computation time and memory requirements are significant. This paper, which is the second part, provides information for code development and validates the state-space model with fatigue test data for different types of variable-amplitude and spectrum loading in 7075-T6 and 2024-T3 aluminum alloys, respectively. Predictions of the state-space model are compared with those of the FASTRAN and AFGROW codes.",
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Fatigue crack growth under variable-amplitude loading : Part II - Code development and model validation. / Ray, Asok; Patankar, Ravindra.

In: Applied Mathematical Modelling, Vol. 25, No. 11, 01.11.2001, p. 995-1013.

Research output: Contribution to journalArticle

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