Abstract
Various elastomeric seals are widely used to prevent mainly lubricant leakage, and secondly ingression of foreign particles into the system. In spite of the steel shafts were generally heat treated and coated with hard material, it is reported that the sealing surfaces were damaged and worn by abrasive particles. In this paper, using nonlinear finite element code MARC, a contact analysis were conducted to show the coated steel shaft surface can be failed by fatigue due to very small spherical particles exist between seal and steel shaft. Variations of contact and von-Mises stress distributions with seal interference and coating thickness are presented. The results show that the sealing surface can be also worn by sub-surface fatigue due to wear particles together with previous well known abrasive wear. Therefore, the contact model and numerical methods adopted in this paper can be applied in design of various sealing systems, and further intensive studies are required.
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