Finite Element Modeling of Early Stage Self-loosening of Bolted Joints
Haoliang Xu, Lihua Yang, Lie Yu
Available Online July 2015.
- https://doi.org/10.2991/icismme-15.2015.28How to use a DOI?
- Bolted Joints; Self-loosening; Clamping Force
- Bolted joints is one of the most widely used connections due to relatively simple structure, easy accessibility and reliability. However, Bolted Joints will gradually lose the clamping force under cyclic external loading, especially transverse loading. In order to fully reveal the nature of early stage self-loosening of bolted joints, in view of the common bolted joints of grade 6.8, this paper firstly establishes the elastic finite element model, and analyzes the change of clamping force under different pre displacement. The results show that the clamping force is proportional to the pre displacement. Then, in view of the common bolted joints of grade 6.8 under transverse cyclic loading, this paper establishes the elastic-plastic finite element model, and simulates the process of early stage self-loosening of bolted joints under different lateral cyclic load amplitude, different initial preload, and different clamping surface friction coefficient. It can be seen that the early stage self-loosening of bolted joints under lateral cyclic loading is due to the accumulation of local cyclic plastic deformation at the root of the engaged thread. The bigger lateral cyclic loading amplitude leads to the faster self-loosening. The greater preload will result in a greater remaining clamping force. There is almost no relationship between the friction coefficient of clamping surface and the self-loosening of bolted joints. Reasonable preload can effectively improve the bolted connection relaxation.
- Open Access
- This is an open access article distributed under the CC BY-NC license.
Cite this article
TY - CONF AU - Haoliang Xu AU - Lihua Yang AU - Lie Yu PY - 2015/07 DA - 2015/07 TI - Finite Element Modeling of Early Stage Self-loosening of Bolted Joints BT - First International Conference on Information Sciences, Machinery, Materials and Energy PB - Atlantis Press SP - 136 EP - 141 SN - 1951-6851 UR - https://doi.org/10.2991/icismme-15.2015.28 DO - https://doi.org/10.2991/icismme-15.2015.28 ID - Xu2015/07 ER -