Mechanics & Industry
Volume 23, 2022
|Number of page(s)||13|
|Published online||17 February 2022|
Modelling of elastoplastic, multi-scale and multi-contact problems: application to worm gears
Univ Lyon, INSA Lyon, CNRS, LaMCoS, UMR5259, 69621 Villeurbanne, France
2 MECALAM, CEI, 66 bd Niels Bohr − CS 52132, 69603 Villeurbanne, France
* e-mail: email@example.com
Accepted: 14 January 2022
A nonconventional application of worm gears exploits the irreversibility of these power transmission devices in order to realize fast emergency braking. This application can be used to secure lifting devices. A limiting factor in the design of these instantaneous braking systems is the residual deformations of the worm/wheel contacting teeth, due to the impact between them at each emergency stop. The prediction of these residual displacements requires solving of an elastic–plastic, multi-scale and multi-contact problem. Original numerical tools were developed in this study to solve the problem at global and local scales. The method has been validated by comparing the obtained results with 3D measurements on new and deformed worm/wheel pairs. In order to predict the issue of the worm gear after an impact, a criterion based on kinematic errors is proposed. Applying this criterion gives the maximal admissible torque for the braking system to be operational after the impact.
Key words: worm gear / elastic–plastic / multi-scale / multi-contact / residual displacements / kinematic errors
© S.M.B. Albahrani et al., Published by EDP Sciences 2022
This is an Open Access article distributed under the terms of the Creative Commons Attribution License (https://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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