Investigating the growth of surface crack and high cycle fatigue in surface-piercing propeller, By Mohammad Reza Golbahar

Research

Title	Investigating the growth of surface crack and high cycle fatigue in surface-piercing propeller
Type	Article
Keywords	Surface piercing propeller; crack growth; stress intensity factor; J-integral; fatigue life
Journal	MECHANICS BASED DESIGN OF STRUCTURES AND MACHINES
DOI	https://doi.org/10.1080/15397734.2024.2389117
Researchers	Mojtaba Pakian Bushehri (First researcher) , Mohammad Reza Golbahar (Second researcher) , Parviz Malekzadeh (Third researcher) , Ehsan Bahmyari (Fourth researcher)

Abstract

In this study, the progress of surface crack and high cycle fatigue of the surface piercing propellers (SPPs) are investigated numerically using the finite element method. The cyclic load is calculated from the hydrodynamic pressure on the blade by simulating the fluid around the blade using the computational fluid dynamics software STAR-CCMþ. The initial cracks are assumed to be created near the blade root. The fatigue life is calculated from the Paris-Erdogan equation. The results show that the crack close to the root has a shorter life and the stresses at the crack front depend on the blade-water interaction duration.