On the use of NASGRO software to estimate fatigue life under constant and variable amplitude loadings in aluminum alloy SAE-AMS 7475-T7351-Reference-Cited by-同舟云学术

On the use of NASGRO software to estimate fatigue life under constant and variable amplitude loadings in aluminum alloy SAE-AMS 7475-T7351

Published:2023-09-15 Issue: Volume: Page:
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Author:

Neto Raimundo Amorim¹,Chemin Aline Emanuele Albuquerque²,Filho Waldek Wladimir Bose³,Ruchert Cassius Terra²^ORCID

Affiliation:

1. Universidade Federal Rural do Semi-Árido: Universidade Federal Rural do Semi-Arido

2. Universidade de Sao Paulo

3. Universidade de São Paulo: Universidade de Sao Paulo

Abstract

Abstract This paper uses several fatigue life prediction models implemented in the NASGRO program in order to predict the behavior of cracks on constant amplitude and variable amplitude loads. The experimental data consist of an aeronautical aluminum alloy SAE-AMS 7475-T7351. In the cases of constant loading amplitude (CAL) C(T) compact test specimens were used and M(T) type specimens were used in variable load amplitude casings (VAL). With respect to the constant amplitude data the fatigue growth rates and consequently the parameters of the Paris equation and the KIC values were obtained with the simulations. In this way the obtained values were satisfactory having good correlations. Regarding VAL the calibration parameters for each of the interaction models were obtained for each of the charge spectrum which for this work were TWIST and FALLSTAFF spectrums and their mini versions. The NASGRO 4.0 program presented overall good forecasting results.

Publisher

Research Square Platform LLC

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