Analysis on Transient Stress State of Elastic Thin-Wall Component of Harmonic Gear Drive

Article Preview

Abstract:

To overcome the crack problem of thin wall structure of harmonic gear transmission─ flexspline, we develop a transient dynamic analysis model for B1-50-80 harmonic gear transmission. Based on large displacement and large strain theory, the transient stress state of the flexspline is analyzed under maximum rated conditions. The distribution law of transient stress is obtained when the amplitude of stress histories on flexspline gear changes in sine form and the change process of stress of flexspline gear ring are from top to bottom. We observe that over-stress of flexspline on tube gradually decreases along the axis and the stress distribution between flexspline and flexspline gear ring becomes a certain slant due to force irregularly on flexspline tooth in the axial direction. The maximum Von Mises stresses appears in the contact regions between flexspline gear ring and wave generator. Therefore, cracks will originate from the dedendum regions of flexspline, then extend along the axis, and finally expand along 45°.

You might also be interested in these eBooks

Info:

Periodical:

Advanced Materials Research (Volumes 317-319)

Pages:

281-286

Citation:

Online since:

August 2011

Export:

Price:

Permissions CCC:

Permissions PLS:

Сopyright:

© 2011 Trans Tech Publications Ltd. All Rights Reserved

Share:

Citation:

[1] Shen Yunwen, Ye Qingtai. Harmonic Gears Drive Theory and Design. Machinery Industry Press, Publishers (1985) .(In Chinese)

Google Scholar

[2] Liu Wenzhi, Zhang Nairen. Harmonic Gears Drive Flexspline of Finite Element Calculation and Analysis. Journal of Mechanical Engineering. 2006, Vol. 42, pp.52-57(In Chinese).

Google Scholar

[3] Kikuchi M, Nitta R, Kiyosawa Y, Zhang XY. Stress Analysis of Cup Type Strain Wave Gearing. Progress in Experimental and Computational Mechanics in Engineering. 2003, Vol. 243 , p.441~447

DOI: 10.4028/www.scientific.net/kem.243-244.129

Google Scholar

[4] Oguz Kayabasi, Fehmi Erzincanli. Shape Optimization of Tooth Profile of a Flexspline for a Harmonic Drive by Finite Element Modeling. Materials and Design. 2007, Vol. 28, p.129~134

DOI: 10.1016/j.matdes.2005.09.009

Google Scholar

[5] Ostapski W. Analysis of the Stress State in the Harmonic Drive Generator-Flexspline System in Relation to Selected Structural Parameters and Manufacturing Deviations. Bulletin of the Polish Academy of Sciences-Technical Sciences. 2010, Vol. 58, p.683~698.

DOI: 10.2478/v10175-010-0073-8

Google Scholar