TY - GEN
T1 - A Polynomial Equation Model for Fatigue Crack Propagation in an Aeronautical Steel Material
AU - Alvarado-Silva, Carlos Alexis
AU - de Oliveira, Geraldo Cesar Rosario
AU - Gamarra-Rosado, Victor Orlando
AU - Silva, Fernando de Azevedo
N1 - Publisher Copyright:
© 2022 Trans Tech Publications Ltd, Switzerland.
PY - 2022/1/1
Y1 - 2022/1/1
N2 - The model widely used in the fatigue crack growth study in materials science and fracture mechanics is the Paris-Erdogan, which relates the stress intensity factor with the subcritical crack growth, under a fatigue regime. In this work, a seven degree polynomial is used as an alternative to model the crack propagation behavior and to be able to analyze the three regions charts of the cycles by load, in contrast to the common model that it performs at a slight approximation of the propagation phase of the trinca (region II). Finally, a comparison has been made between the proposed model and the secant method by the ASTM 647,2000 standard that adjusts the points obtained experimentally. This proposed equation is new as another alternative analytical model for which the adjustment parameter “R” are compared in relation to the classical approach in a aeronautical ABNT 4130 steel.
AB - The model widely used in the fatigue crack growth study in materials science and fracture mechanics is the Paris-Erdogan, which relates the stress intensity factor with the subcritical crack growth, under a fatigue regime. In this work, a seven degree polynomial is used as an alternative to model the crack propagation behavior and to be able to analyze the three regions charts of the cycles by load, in contrast to the common model that it performs at a slight approximation of the propagation phase of the trinca (region II). Finally, a comparison has been made between the proposed model and the secant method by the ASTM 647,2000 standard that adjusts the points obtained experimentally. This proposed equation is new as another alternative analytical model for which the adjustment parameter “R” are compared in relation to the classical approach in a aeronautical ABNT 4130 steel.
KW - Aeronautical Steel
KW - Crack Propagation
KW - Curve Fitting
KW - Materials Fatigue
UR - https://www.scopus.com/pages/publications/85129424086
U2 - 10.4028/p-7j8ye8
DO - 10.4028/p-7j8ye8
M3 - Conference contribution
AN - SCOPUS:85129424086
SN - 9783035726848
T3 - Materials Science Forum
SP - 212
EP - 217
BT - Material Science and Engineering Technology X - Selected peer-reviewed full text papers from the 10th ICMSET 2021, 5th ICBMM 2021 and 6th ICMTA 2021
A2 - Agarwal, Ramesh K.
A2 - Mendonça, Paulo
A2 - Chastre, Carlos
PB - Trans Tech Publications Ltd
T2 - 10th International Conference on Material Science and Engineering Technology, ICMSET 2021, 5th International Conference on Building Materials and Materials Engineering, ICBMM 2021 and 6th International Conference on Materials Technology and Applications, ICMTA 2021
Y2 - 30 October 2021 through 2 November 2021
ER -