Research Article

# Fatigue and Damage Tolerance, Prediction of Crack Propagation on Plate Using Paris Equation and Walker Equation

@INPROCEEDINGS{10.4108/eai.30-10-2021.2315783, author={Andry Renaldy Pandie and A.R. Yudiana and Hermansah Hermansah}, title={Fatigue and Damage Tolerance, Prediction of Crack Propagation on Plate Using Paris Equation and Walker Equation}, proceedings={Proceedings of the First Multidiscipline International Conference, MIC 2021, October 30 2021, Jakarta, Indonesia}, publisher={EAI}, proceedings_a={MIC}, year={2022}, month={1}, keywords={stress; failure; paris; walker; fatigue; crack}, doi={10.4108/eai.30-10-2021.2315783} }

- Andry Renaldy Pandie

A.R. Yudiana

Hermansah Hermansah

Year: 2022

Fatigue and Damage Tolerance, Prediction of Crack Propagation on Plate Using Paris Equation and Walker Equation

MIC

EAI

DOI: 10.4108/eai.30-10-2021.2315783

## Abstract

Metals subjected to repetitive stresses and loads will be damaged at certain cycle stresses which cause fracture and failure. This failure was marked by a defect. To predict the magnitude of the propagation of the crack until the failure of the structure is used the Paris equation and the Walker equation to solve it. In this article, the boundaries used to determine a structure fail with the initial crack length known to consist of limits: , , , and The method used to solve this case is the study of literature and using the Matlab software whose steps are contained in the flow diagram. The material to be analyzed and predicted for the addition of cracks is the aluminum series Al-2219-T87 with geometry a (70E-3 m), W (150E-3 m), σmax (20 MPa), σmin (12, 13, 14, 16 MPa). After analysis, conclusions are obtained: 1Analysis using the Walker equation gives the value of fatigue life or the number of failed cycles that are less than the Paris equation, this is because Walker takes into account the stress ratio, 2The average percentage change in the cycle in the Paris equation starting from σmin 12 to 16 is 55.52%, 3The average percentage of cycle changes in the Walker equation starting from σmin 12 to 16 is 39.28%, 4The average percentage of cycle changes in the Paris and Walker equations starting from σmin 12 to 16 is 70%, 5Fatigue life will increase if the value of R gets closer to the value 1, 8 the structure fails when (a = 120 mm).