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CSME 2023/03
Volume 44 No.1
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99-108
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Analytical Approach and Numerical Simulation to Investigate the Stress Field and the Dynamic Stress Intensity Factor of a Cracked-Shaft Under a Periodic Loading
Khemais Hamrouni a, Mohamed Boughazala b, Abdessattar Aloui a and Mohamed Haddar b
aHigher Institute of Applied Sciences and Technology, University of Gabes, Tunisia.
bMechanics, Modelling and Manufacturing Laboratory (LA2MP), Mechanical Engineering Department, National Engineers School of Sfax, B.P. W3038, Sfax, Tunisia.
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Abstract:
A new analytical formulation was developed to investigate the dynamic behavior of a cracked-shaft subjected to a torsional loading. To validate the effectiveness of the analytical approach a three – dimensional model was designed by the ABAQUS software based on the finite elements method and on the contour integral technique (CIT). A refined mesh was applied in the crack region to better simulate the stress concentration. The variation of the stress intensity factor (SIF) KIII, associated with the opening crack mode III, and the stress field in the vicinity of the crack were studied taking into account the effect of both the crack size and the external load. The results show that the values of SIFs KIII become more pronounced when the dimensionless ratio μ exceeds 0.6. The magnitude of SIFs KIII is enhanced from 66.34 MPa.m1/2to 110.8 MPa.m1/2when the load magnitude is increased from 60N.m to 100N.m. The results of the stress field reveal a good agreement between the analytical results and the FEM findings with an acceptable error that does not exceed 5%.
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Keywords: Cracked-shaft, periodic loading, dynamic stress intensity factors, stress field.
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©
2023
CSME , ISSN 0257-9731
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