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ARTICLE
Stress and load distribution analysis in bolt connection with modified thread profile under high temperature conditions
| 1 | School of Vehicle Engineering, Chongqing University of Technology, Chongqing, China |
| 2 | Key Laboratory of Advanced Manufacturing Technology for Automotive Components, Ministry of Education, Chongqing,
China |
| 3 | Chongqing Tsingshan Industrial Co., Ltd., Chongqing, China |
| 4 | Chongqing Zongshen Engine Manufacture Co., Ltd., Chongqing, China |
CORRESPONDING AUTHOR
Submission date: 2021-04-11
Final revision date: 2021-05-27
Acceptance date: 2021-06-09
Online publication date: 2021-07-21
Publication date: 2021-07-25
Journal of Theoretical and Applied Mechanics 2021;59(3):469–480
KEYWORDS
bolt connectionthread designload distribution of bolthigh temperature creeptestfinite element analysis
TOPICS
ABSTRACT
In this paper, the load distribution of a bolt connection structure with a variable thread
profile at high temperature is investigated. The parameters of time-hardening creep model
of aluminum alloy at high temperature were obtained by fitting the uniaxial creep tensile
test data of aluminum alloy at 250◦C. Based on ABAQUS, a two-dimensional axisymmetric
model of the bolt connection structure was established, and according to the thread load
distribution considering linear elasticity, plasticity and creep characteristics, modification
of standard metric thread profile was carried out. The load distribution law of the thread
of the modified bolt connection structure were investigted. The results show that the load-
-bearing ratio of the first thread can be significantly reduced and the load-bearing distribu-
tion uniformity of all threads can be improved when the modified thread is applied to the
bolt connection structure.
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