Reconstruction of Real Rough Surface Based on Fractal and the Study on Bolt Assemble Technique

Abstract:

Aiming at the importance of the microcosmic topography of connecting surface and bolt assembling technique to the bolt connection performance, the fractal characteristic of bolt joint rough surface is studied based on the power spectrum of its micro surface profile. Fractal models of 2D and 3D rough surfaces are presented by W-M function and the 2D and 3D bolt joint rough surfaces are reconstructed. Imageware and Pro/e are used to build the bolt connecting model based on the real rough surface presented by W-M function. The preload is imitated by the PREST179 element. The finite element transient analysis is used to imitate the speed and force size of the bolt tightening. The relationship model between tighten speed, preload size and connecting performance whose target is contact stress is presented based on the finite element analysis results. According the model, the single bolt precise assembling technique is obtained.

• Periodical: Applied Mechanics and Materials (Volume 248)
• Pages: 426-432
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.248.426
• Online since: December 2012
• Authors: Wei Wang, Qiang Tang, Xiao Dong Xu, Shui Qing Gong, Xiao Peng Liu
• Keywords: Assembling Technique, Bolt Connecting, Fractal, Rough Surface

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