Improvement of performance of bolt–nut connections, Part II: Experimental investigation-Reference-Cited by-同舟云学术

Improvement of performance of bolt–nut connections, Part II: Experimental investigation

Published:2014-03-11 Issue:17 Volume:228 Page:3078-3089
ISSN:0954-4062
Container-title:Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science
language:en
Short-container-title:Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science

Author:

Majzoobi GH¹,Dabbagh M Agh-Mohammad²,Asgari P²,Pipelzadeh MK³,Hardy SJ³

Affiliation:

1. Mechanical Engineering Department, Bu-Ali Sina University, Hamedan, Iran

2. Mechanical Engineering School, Azad University, Takestan branch, Takestan, Iran

3. College of Engineering, Swansea University, Swansea, UK

Abstract

In this work, bolt and nut geometries are modified for the improvement of fatigue life of the bolt–nut connections. The modifications are aimed at reducing the stress concentration at the thread roots by factors such as reducing the shank diameter, making axial hole in bolt, stepping the nut and their combinations. The effect of modifications is studied by experiment and simulation. The experimental results show that all types of modifications considered result in an improvement in the fatigue resistance of bolt–nut connections but to different extents. However, the effects of the two latter types are more significant. The most improvement is achieved for the case when all types of modifications are combined together. In this case, fatigue life can be increased by almost 100%. Numerical results also show that all types of modifications lead to the reduction of stress concentration.

Publisher

SAGE Publications

Subject

Mechanical Engineering

Link

http://journals.sagepub.com/doi/pdf/10.1177/0954406214525950

Reference26 articles.

1. A modification to the theory for the load distribution in conventional nuts and bolts

2. Reduction of Stress Concentration in Bolt-Nut Connectors

3. Stress analysis of some nut-bolt connections with modifications to the external shape of the nut

4. The optimisation of the design of nuts with partly tapered threads

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