Finite element analysis and contact modelling considerations of interference fits for fretting fatigue strength calculations

Lanoue, Frederic; Vadean, Aurélian; Sanschagrin, B.

doi:10.1016/j.simpat.2009.06.017

Cited by 56 publications

(18 citation statements)

References 22 publications

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“…Due to the different positions and asymmetry of tooth holes, tensile stress caused by interference fit generates a complex stress field at end face of the drill bit. According to previous study, the tensile stress level around the side teeth is much higher than that around the interior teeth [17]. Stress status on the edge of the end face nearby side teeth is simplified to the sketches shown in Fig.…”

Section: Stress Status and Crack Initiationmentioning

confidence: 99%

Failure Analysis of Cracking on Side Tooth Gingivae of a Percussive Drill Bit

Tianliang¹,

Liu²,

Du³

et al. 2016

TOMSJ

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Abstract:Failures of percussive drill bits have been attributed to the external mechanical force and structural design by engineers and researchers for a long time. Few attentions have been focused on the material itself. Generally, it is the unqualified material, induced by the improper metallurgy and heat treatment process, which makes the drill bits fail soon after they are put into service. Reasons of the crackings on side tooth gingivae of a drill bit, which failed prematurely at the beginning of the service, were analyzed comparatively. Scanning electron microscope, metallographic observation, mechanical performance test and chemical composition analysis were adoptedfor the failure analysis. Results show that microstructure, chemical composition and mechanic properties of the substrate were excluded from the reasons of the cracking. It is mainly the excessive inclusions and defects in the carburized layer which induced the inhomogeneity of material organization and performance. Those inclusions and defects act as stress concentrators and leading to the crack initiation. In addition, toughness of the carburized layer is also decreased due to its over-carburization. It makescracks more easily initiate from the carburized layer and then propagate into the substrate under the stress of interference fit.

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Section: Stress Status and Crack Initiationmentioning

confidence: 99%

Failure Analysis of Cracking on Side Tooth Gingivae of a Percussive Drill Bit

Tianliang¹,

Liu²,

Du³

et al. 2016

TOMSJ

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show abstract

“…than the mesh size type [12] and in particular the contact formulation as well as the contact stiffness parameters. Finite Elements Analyses have been performed by means of the Ansys Code, Workbench Release 12.…”

Section: Structural Analysis Of An Articulated Urban Bus Chassis Via mentioning

confidence: 99%

Structural Analysis of an Articulated Urban Bus Chassis via FEM: a Methodology Applied to a Case Study

Croccolo¹,

Agostinis²,

Vincenzi³

2011

SV-JME

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“…The connection effect at nominal interference of the turbine rotor was analyzed [8]. The contact modelling of the interference fit was established for fretting fatigue strength calculations using finite analysis [9].…”

Section: Introductionmentioning

confidence: 99%

Transient Analysis and Design Improvement of a Gas Turbine Rotor Based on Thermal-Mechanical Method

Liu

Yuan

Zhu

et al. 2018

Shock and Vibration

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The rotor is the core component of a gas turbine, and more than 80% of the failures in gas turbines occur in the rotor system, especially during the start-up period. Therefore, the safety assessment of the rotor during the start-up period is essential for the design of the gas turbine. In this paper, the transient equivalent stress of a gas turbine rotor under the cold start-up condition is investigated and the novel tie rod structure is introduced to reduce the equivalent stress. Firstly, a three-dimensional finite element model of the gas turbine rotor is built, and nonlinear contact behaviors such as friction are taken into account. Secondly, the convective heat transfer coefficients of the gas turbine rotor under the cold start-up condition are calculated using thermal dynamic theory. The transient analysis of the gas turbine rotor is conducted considering the thermal load, the centrifugal load, and the pretightening force. The temperature and stress distributions of the rotor under the cold start-up condition are shown in detail. In particular, the generation mechanism of maximum equivalent stress for tie rods and the change tendency of the pretightening force are illustrated in detail. The tie rod holes of the rear shaft and the turbine tie rod are the dangerous locations during the startup period. Finally, a novel tie rod is proposed to reduce the maximum equivalent stress at the dangerous location. The maximum equivalent stress at this location is decreased by 15%. This paper provides some reference for the design of the gas turbine rotor.

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Finite element analysis and contact modelling considerations of interference fits for fretting fatigue strength calculations

Cited by 56 publications

References 22 publications

Failure Analysis of Cracking on Side Tooth Gingivae of a Percussive Drill Bit

Failure Analysis of Cracking on Side Tooth Gingivae of a Percussive Drill Bit

Structural Analysis of an Articulated Urban Bus Chassis via FEM: a Methodology Applied to a Case Study

Transient Analysis and Design Improvement of a Gas Turbine Rotor Based on Thermal-Mechanical Method

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