Sharif University of Technology Scientia Iranica 1026-3098 26 3 2019 06 01 Impact of nonlinearity on bolt forces in multi-bolted joints: A case of the assembly stage 1299 1306 20320 10.24200/sci.2018.20320 EN R. Grzejda Faculty of Mechanical Engineering and Mechatronics, West Pomeranian University of Technology, Szczecin, Poland. Journal Article 2016 10 10 This article concerns modeling, computation and analysis of multi-bolted joints in the assembly stage. The physical joint model is introduced as the assembly of the following three basic subsystems: a set of fasteners (bolts), a flexible joined flange and a contact layer between it and a rigid support. The finite element method (FEM) is used for modeling. Bolts are replaced by the bolt models of the spider type. The joined flange is modeled with spatial finite elements. As a model of the contact layer, the Winkler contact layer model is adopted. The truth of the theorem has been tested, according to which nonlinear characteristics of the contact layer may have an insignificant impact on computational final values of bolt preloads in the case of sequential tightening of the joint. The results of the calculations for the selected multi-bolted joint are given and compared with the experimental results. Conclusions of paramount importance to the engineering practice are comprised. https://scientiairanica.sharif.edu/article_20320_e7eee02bd9fffa1fa5c9e0f26b7128d7.pdf