Filip Lisowski
Technical Transactions, Mechanics Issue 1-M (5) 2013 , 2013, pp. 237-244
https://doi.org/10.4467/2353737XCT.14.030.1956The paper presents an application of finite element method in the optimal design of the nut with a groove in the end-face. There were described issues of the load distribution and FEM modeling of threaded connections. The optimization problem was formulated with the aim of obtaining the uniform load distribution on the bolt’s thread depending on the geometry of nut.
Filip Lisowski
Technical Transactions, Mechanics Issue 2-M (7) 2015, 2015, pp. 141-148
The paper presents finite element analysis of stresses and deformations of planetary roller screw components. The finite element model takes into account the frictional contact between helical surfaces. The results of numerical calculations for the contact problem were compared with the theoretical solution based on the Hertz theory. The obtained results can be used in the development of design procedures of planetary roller screw.
Filip Lisowski
Technical Transactions, Mechanics Issue 2-M (7) 2015, 2015, pp. 149-156
The paper presents an application of the Finite Element Method (FEM) in stress analysis and optimization of thread profiles in cooperation of the roller with the screw in the planetary roller screw mechanism. The problem of the roller and the screw threads cooperation as well as related geometrical parameters were described. The optimization problem was formulated with the aim of obtaining a better effort of threads and lower contact pressure depending on the geometry.
Filip Lisowski
Technical Transactions, Volume 9 Year 2017 (114), 2017, pp. 219-227
https://doi.org/10.4467/2353737XCT.17.162.7174The paper presents the optimization problem of a thread root undercut in the roller of planetary roller screw using FEM. The depth and shape of the undercut as well as the radii of thread profiles curvature were optimized for the series of cooperating threads. The maximum HMH reduced stress in the undercut was accepted as an objective function. The limitation to the maximum contact pressure was assumed. The procedure aimed at limiting the range of variables was accepted in order to improve the efficiency of optimization method.