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Mohsen Mosleh, Ph.D.
Associate Professor
Phone: (202) 806-6622
Email: mmosleh@howard.edu
Research Topics
Development of Polymeric Homocomposites, Wear of Total Knee and Hip Joint Replacements, Surface Engineering, Manufacturing Processes
Summary of Recent Research
1. Cleaner, Environmentally Safer Automobile Brakes: The brake dust generated in vehicle brakes causes the discoloration of the wheel and the emission of particles suspected of health hazard into the environment. Due to their submicrometer size, a significant amount of the brake dust particles may be inhalable in the environmental and occupational exposure situations. In order to prevent the dispersion of particles into the surrounding environment, a surface topography design with radial microgrooves on the disc was utilized to trap wear particles immediately after their formation. The particles moved radially outward in the microgrooves due to the centrifugal force and were collected in a reservoir. The design yielded a cleaner pad/disc test setup, a smoother friction coefficient plot, and a reduced wear volume.
2. Polyethylene Homocomposites for Total Joint Replacements: A polyethylene homocomposite consisting of an ultra high molecular weight polyethylene (UHMWPE) fiber and matrix has been developed. The UHMWPE fibers have a significantly higher strength and a higher melting temperature due to their highly oriented molecules. The homocomposite is manufactured by compression molding of the mixture of UHMWPE resin and chopped fibers at the resin melting temperature. The mechanical and tribological properties of the homocomposite have significantly improved compared with those of UHMWPE. It has also shown 500% improvement in wear resistance in dry sliding. The high wear resistance and the biocompatibility of this composite material make it a candidate as a Total Joint Replacement material.
3. Nano-scale Abrasion: The goal of this research is to develop a simulation tool for study of nano-scale erosion and third-body abrasion at the interface of sliding surfaces. The phenomenon is being simulated using a parallel molecular dynamic code run on a supercomputer.
Recent Publications
Mohsen Mosleh, Peter J. Blau, and Delia Dumitrescu, “Characteristicsof Wear Particles From Laboratory Testing on Brake Materials.” Wear, Vol. 256, Issues 11-12, pp. 1128-1134, 2004.
Mosleh, M., Saka, N., and Suh, N. P., "A Mechanism of high friction in dry contact sliding bearings." Journal of Wear, Vol. 252, Issue 1-2, pp. 1-8, 2002.
Mosleh, M., " Effects of high vacuum and/or elevated temperature environments on friction of sleeve bearings." Journal of Friction and Wear, Vol. 22, Issue 5, pp. 46-53, 2001 (September-October Issue)
Mosleh, M., Laube, S. J.P., and Suh, N., "Friction of undulated surfaces coated with MoS2 by pulsed laser deposition." STLE Transactions, Vol. 42(3), pp. 495-502, 1999.
Jahanian, S., and Mosleh, M., “On the mathematical modeling of phase transformation of steel during quenching.” Journal of Materials Engineering and Performance, Vol. 8(1), pp. 75-82, 1999.
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