In engineering problems surface roughness is often neglected for the sake of simplicity of model and to reduce time, but surface roughness plays an important role in many engineering applications like MEMS, Thermal Contact Conductance, and Insulation etc. In this paper, modeling of surface roughness is done in Ansys 13 and effect of surface roughness on contact pressure is shown. The rough surface model created as array of asperities with the same radius of asperities and same asperity height, which is assumed to be following Gaussian distribution. The modeling is done for surface roughness 1, 5, 10, 15 and 20 μm. The effect of surface roughness on contact pressure is shown by comparison of contact pressure of 1 and 5 μm roughness. Physical dimension of the two body contacting each other is 1 X 1 X 6 mm. The pressure applied on the body is 1.8MPa with consideration of other body with fix support.
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