Eventos Anais de eventos
MecSol 2017
6th International Symposium on Solid Mechanics
FATIGUE ANALYSIS OF A COMPACT TENSION SPECIMEN WITH MULTIPLE VOIDS/HOLES REPAIRED BY STOP-HOLE TECHNIQUE
Submission Author:
Mohammad Malekan , MG
Co-Authors:
FELICIO BARROS, hermes carvalho
Presenter: Mohammad Malekan
doi://10.26678/ABCM.MecSol2017.MSL17-0093
Abstract
From the engineering point of view there are traditionally two ways to approach the fatigue design problem: safe-life and damage-tolerant. The damage-tolerant methodology focus on predictions of the fatigue crack growth rate and the remaining fatigue life whereas the safe-life design methodology focuses on estimating the total life. Thus, estimations of the remaining fatigue life of a flawed structure is only possible through use of the damage-tolerant approach. Fatigue is a process in engineering materials in which damage accumulates due to the fluctuating loading. One solution for a component under the fatigue process is to arrest the crack growth before the final failure using different available retardation methods. This paper aims to investigate the effect of the stop-hole retardation technique and multiple micro-cracks/voids on the fatigue crack growth (FCG) in a compact tension specimen. Considering the linear elastic fracture mechanics concept, the Paris law will be used to define the transition between crack initiation and crack growth period. Also, the extended finite element method will be adapted in the crack propagation phase in order to exclude the remeshing procedure. The whole analyses are conducted in a commercial package along with some user-written codes to make the FCG process easier. The reference solutions from the literature are used to compared and validate the results obtained from the current research.
Keywords
Fatigue Analysis, Crack Retardation, Finite Element Method, Stress Intensity Factor, Holes, Fatigue Analysis, Crack Retardation, Finite Element Method, Stress Intensity Factor, Holes
