ISSN 2594-5327
56º Congresso anual — Vol. 56 , num. 1 (2001)
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The modeling of load interaction effects on mode I fatigue crack propagation is discussed in this paper. Overload-induced retardation effects on the crack growth rate are considered, based on the crack closure idea, and a taxonomy of the load interaction models is presented. Modifications to the traditional retardation models are proposed to better model such effects as crack arrest, crack acceleration due to compressive underloads, and the effect of small cracks. These models are implemented on the ViDa software, developed to automate the fatigue dimensioning process by all the traditional methods used in mechanical design. Using this software, the presented load interaction models and the proposed modifications are compared with experimental results from various load spectra. In particular, the proposed modifications to the Wheeler model showed a good agreement with the experimental data. In a companion paper, these ideas are expanded to 2D crack propagation.
The modeling of load interaction effects on mode I fatigue crack propagation is discussed in this paper. Overload-induced retardation effects on the crack growth rate are considered, based on the crack closure idea, and a taxonomy of the load interaction models is presented. Modifications to the traditional retardation models are proposed to better model such effects as crack arrest, crack acceleration due to compressive underloads, and the effect of small cracks. These models are implemented on the ViDa software, developed to automate the fatigue dimensioning process by all the traditional methods used in mechanical design. Using this software, the presented load interaction models and the proposed modifications are compared with experimental results from various load spectra. In particular, the proposed modifications to the Wheeler model showed a good agreement with the experimental data. In a companion paper, these ideas are expanded to 2D crack propagation.
Palavras-chave
fatigue, crack propagation, sequence effects
fatigue, crack propagation, sequence effects
Como citar
Meggiolaro, Marco Antonio; Castro, Jaime Tupiassú Pinho de.
COMPARING OVERLOAD-INDUCED RETARDATION MODELS ON FATIGUE CRACK PROPAGATION,
p. 1709-1719.
In: 56º Congresso anual,
Belo Horizonte, Brasil,
2001.
ISSN: 2594-5327, DOI 10.5151/2594-5327-C01250
