Friction/stiction and wear are among the main issues in microelectromechanical systems (MEMS/NEMS) devices having contact interfaces. Relevant parameters, i.e., layers thickness, need to be optimized. The contact analyses of multilayered structure under both dry and wet conditions are necessary to optimize these parameters. This study presents a first attempt to perform three-dimensional contact analysis of multilayered solids with rough surfaces in both dry and wet conditions. The surface displacements and contact pressure distributions are obtained based on variational principle with fast Fourier transform scheme. The effective hardness is modeled and plays a role when the local displacement meets the maximum displacement criterion. Simulations are performed to obtain the contact pressures, fractional total contact area, fractional plastic contact area, surface/subsurface stresses. Relative meniscus forces are obtained with the presence of an ultrathin liquid film for different loads and layers properties. These contact statistics and meniscus forces are analyzed to study the effects of layer-to-substrate ratios of stiffness and hardness, and the layers thickness of rough, two-layered elastic/plastic solids. The methods to decrease friction/stiction and wear are investigated, and the optimum layer parameters are identified.
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January 2006
Research Papers
Three-Dimensional Dry/Wet Contact Analysis of Multilayered Elastic/Plastic Solids With Rough Surfaces
Shaobiao Cai,
Shaobiao Cai
Nanotribology Laboratory for Information Storage and MEMS/NEMS (NLIM), 650 Ackerman Road, Suite 255,
The Ohio State University
, Columbus, OH 43202-1107
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Bharat Bhushan
Bharat Bhushan
Fellow ASME
Nanotribology Laboratory for Information Storage and MEMS/NEMS (NLIM), 650 Ackerman Road, Suite 255,
The Ohio State University
, Columbus, OH 43202-1107
Search for other works by this author on:
Shaobiao Cai
Nanotribology Laboratory for Information Storage and MEMS/NEMS (NLIM), 650 Ackerman Road, Suite 255,
The Ohio State University
, Columbus, OH 43202-1107
Bharat Bhushan
Fellow ASME
Nanotribology Laboratory for Information Storage and MEMS/NEMS (NLIM), 650 Ackerman Road, Suite 255,
The Ohio State University
, Columbus, OH 43202-1107J. Tribol. Jan 2006, 128(1): 18-31 (14 pages)
Published Online: August 18, 2005
Article history
Received:
March 9, 2005
Revised:
August 18, 2005
Citation
Cai, S., and Bhushan, B. (August 18, 2005). "Three-Dimensional Dry/Wet Contact Analysis of Multilayered Elastic/Plastic Solids With Rough Surfaces." ASME. J. Tribol. January 2006; 128(1): 18–31. https://doi.org/10.1115/1.2114947
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