Theoretical Analysis of Hydraulically Expanded Tube-to-Tubesheet Joints With Linear Strain Hardening Material Behavior
The mechanism of failure of tube-to-tubesheet joints is related to the level of stresses produced in the tube expansion and transition zones during the expansion process. Maintaining a lower bound lim...
The mechanism of failure of tube-to-tubesheet joints is related to the level of stresses produced in the tube expansion and transition zones during the expansion process. Maintaining a lower bound lim...
Simplified Stress Categorization Using a Single Linear Elastic Analysis
The ASME Boiler and Pressure Vessel Code (code) provides guidelines for the classification of linear elastic stresses into primary, secondary, and peak stresses. Although these guidelines cover a wide...
The ASME Boiler and Pressure Vessel Code (code) provides guidelines for the classification of linear elastic stresses into primary, secondary, and peak stresses. Although these guidelines cover a wide...
Analysis of Heat Flow Around Bolted Joints and Variations of Axial Bolt Force
J. Pressure Vessel Technol. -- December 2009 -- Volume 131, Issue 6, 061203 (7 pages)
doi:10.1115/1.4000198
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A bolted joint is widely used for the structures and machines subjected to thermal load, such as pressure vessels, internal combustion engines, brake disks, etc. In order to accurately evaluate the thermal stresses thus produced, the effect of thermal contact resistance at the interface and the heat flow through small gaps, which exist around the objective bolted joint, must be taken into account. In this paper, a numerical approach is proposed to solve the mechanical and thermal behaviors of bolted joints with high accuracy and computation efficiency, where empirical equations for thermal contact coefficient and apparent thermal contact coefficient are incorporated into commercial engineering software. By conducting systematic three-dimensional finite element analyses, it has been quantitatively elucidated how the supplied heat flows through each part of a bolted joint and how the axial bolt stress and bolt bending stress vary with time. It is concluded that bolted joints made of the materials with low thermal conductivity show specific heat flow patterns around the bolted joint and generate a large amount of variations in both axial bolt stress and bolt bending stress.
©2009 American Society of Mechanical Engineers
| History: | Received 2 July 2008; revised 27 July 2009; published 8 October 2009 | |
| doi: | http://dx.doi.org/10.1115/1.4000198 | |
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