Modelling of elastoplastic, multi-scale and multi-contact problems: application to worm gears

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Modelling of elastoplastic, multi-scale and multi-contact problems: application to worm gears

Authors
  • Albahrani, Sayed Mohamed Baqer
  • Alves, Joël Teixeira
  • Duval, Arnaud
  • Chaise, Thibaut
  • De Vaujany, Jean-Pierre
  • Guingand, Michèle
Type
Published Article
Journal
Mechanics & Industry
Publisher
EDP Sciences
Publication Date
Feb 17, 2022
Volume
23
Identifiers
DOI: 10.1051/meca/2022003
Source
EDP Sciences
Keywords
Disciplines
  • Regular Article
License
Green
External links

Abstract

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.

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