Repetitive Friction Research Articles

Iliotibial band syndrome in cyclists.

Iliotibial band syndrome is an overuse injury caused by repetitive friction of the iliotibial band across the lateral femoral epicondyle. Once considered an injury indigenous to runners, it is now frequently being seen in cyclists. The purpose of this paper is to identify iliotibial band syndrome as a significant problem in cyclists and to propose both operative and nonoperative measures for treating cyclists. Nonoperative measures specific to cyclists consist of bicycle adjustments and training modifications. These are adjunctive therapies to stretching, icing, rest, and oral nonsteroidal antiinflammatory drugs. For cyclists requiring operative intervention, a new surgical technique for excising or releasing the distal iliotibial band is presented. This technique, used by the senior author (JCH) since 1984, involves excision of an elliptical piece of the distal posterior band off the lateral femoral epicondyle.

電磁制御式荷重機構を備えた摩擦摩耗試験機の開発

A new-type friction and wear test appratus is developed which features dynamic controllability of the load by incorporating an electro-magnetic servomechanism in loading system. In the apparatus one pin specimen is impressed on one roller specimen by means of electromagnets. The currents to the magnets are regulated to make the load follow a specified command signal whose values are determined according to the rotational angle of the roller specimen. The I-PD control system is adopted for obtaining desired characteristics of load control. It is confirmed experimentally that the apparatus can perform a repetitive friction and wear test under various dynamical load conditions.