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- 教师姓名：王永青
- 性别：男
- 主要任职：Dean of School of Mechanical Engineering
- 电子邮箱：
- 职称：教授
- 所在单位：机械工程学院
- 学位：博士
- 学科：机械电子工程. 机械制造及其自动化
- 毕业院校：大连理工大学
- 曾获荣誉：特聘教授特聘教授
- 办公地点：机械工程学院1#楼346-2房间
- 联系方式：
Modeling and numerical analysis of multi-bolt elastic interaction with bolt stress relaxation
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- 论文类型：期刊论文
- 发表时间：2016-09-01
- 发表刊物：PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART C-JOURNAL OF MECHANICAL ENGINEERING SCIENCE
- 收录刊物：Scopus、EI、SCIE
- 卷号：230
- 期号：15
- 页面范围：2579-2587
- ISSN号：0954-4062
- 关键字：Multi-bolt; elastic interaction; bolt creep; modeling
- 摘要：Multi-bolt joint distributed around the connecting members are generally adopted to meet the high-performance assembly requirements in aerospace, energy and power industries. However, the initial preload could be low due to non-optimized preload sequence and bolt stress relaxation, especially at elevated temperature. Thus, it is necessary to take elastic interaction and bolt stress relaxation into account before jointing. In this article, a general multi-bolt elastic interaction with bolt stress relaxation is modelled analytically. First, the multi-bolt joint is characterized by spring-node' model and elastic interaction stiffness. Second, the bolt residual preload can be estimated according to linear superposition of elastic interaction and bolt stress relaxation under the condition of node displacement equilibrium. Further, the influence of preloading sequence and bolt stress relaxation on residual preload distribution was numerically analyzed using a typical circular ring with 8-bolt joint. Two bolts' preloading sequences were planned, star sequence and counterclockwise sequence, respectively. The bolt creep simulation time was set as 10h using the power-model at intermediate temperature. From comparison, the predicted results using the developed model were consistent with the FE simulations both with and without bolt stress relaxation.