Design optimization and fatigue testing of an electronically-driven mechanically-resonant cantilever spring mechanism

作者：Kheng Lim Boon; Kean Koay Loke^*; Gitano Briggs Horizon

来源：Materials & Design, 2010, 31(8): 4023-4028.

DOI：10.1016/j.matdes.2010.03.023

A light scanning device consisting of an electronically-driven mechanically-resonant cantilever spring-mirror system has been developed for innovative lighting applications. The repeated flexing of the cantilever spring during operation can lead to premature fatigue failure. A model was created to optimize the spring design. The optimized spring design can reduce stress by approximately one-third from the initial design. Fatigue testing showed that the optimized spring design can operate continuously for over 1 month without failure. Analysis of failures indicates surface cracks near the root of the spring are responsible for the failures.

• 出版日期2010-9