One Method for Estimating Normal Contact Stiffness with R_a and Adhesion Rate

Abstract:

Based on the fractal contact theory, the model about the relation between normal contact stiffness and material properties as well as fractal parameters is established. Then by making use of the relation between fractal parameters and surface roughness, a new method for estimating the normal contact stiffness is put forward. The numerical results indicate that the contact stiffness increases as surface roughness decreases or adhesion rate increases. When the adhesion rate is constant, contact stiffness changes a little while R_a≥6.3μm, but the change is relatively bigger when R_a≤6.3μm. Considering both the cost of surface machining and the influence of contact stiffness on the whole system, the surface roughness is suggested to be R_a=6.3μm. The results provide theoretical supports for vibration isolation analysis with gaskets and the process of low-noise construction.

• Periodical: Advanced Materials Research (Volumes 734-737)
• Pages: 2443-2450
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.734-737.2443
• Online since: August 2013
• Authors: Peng Wang, Tian Yun Li, Xiang Zhu, Guo Xiong Pan
• Keywords: Adhesion Rate, Fractal Model, Normal Contact Stiffness, Surface Roughness (SR)

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