Host: The Japan Society of Mechanical Engineers
Name : [in Japanese]
Date : September 03, 2017 - September 06, 2017
Multi-bolted joint is commonly used in mechanical assemblies in which each bolt/nut assembly is subjected to bending moment besides tension. However, it is unclear how the bending stress affects to the fatigue strength of a bolt. To clarify this, fatigue test by using actual multi-bolted joint would be essential. It is, however, time and cost consuming activity and not practical especially at the design stage.
This study aims to develop testing jigs for fatigue tests which can control the stresses on the force and the bending moment on the bolt to be equal to those in practical bolted joint. A cylinder-cover bolted joint subjected to internal pressure was selected as an example of the multi-bolted joint, and the test jigs were designed using 3D FE analysis with solid bolt/nut model. The results show that the stress acting on the bolt can be coincided with those in the practical cylinder-cover-bolted joint.
