Some researchers studied normal contact stiffness between rough surfaces in theory, their researches, however, are all based on the statistically describing results of the micro profile of rough surfaces.

The vice thread relaxation and normal contact stiffness reduction are the main reasons for load reduction of dynamometry bolt in the non-anchored section.

Finite element analysis and application of friction damper tangential contact stiffness

Study on contact stiffness factor selection method in contact non-linear simulation

Based on truing model of saucer diamond-grinding wheel with cup wheel, the influence of contact stiffness between saucer wheel and cup wheel on the stability of the grinding system and grinding force was discussed, as well as verifying of the signal characteristic and changing rule of grinding force.

Research for contact rigidity of marine ME s base gasket;

Through alter the method on scraping contact surface between main spindle head and lathe frame, we may increase contact point and improve the contact rigidity.

Based on the theoretical analysis on some current connecting materials between the ship main engine and its base, the author holds that, in installing main engine of the same type, the casting epoxy shim shows the maximum contact rigidity, and the integral rectangular shim would be the next and the adjusting shim appears to be the minimum, which is not adopted to general circumstance.

Contact FEM analysis with normal penalty stiffness factor(FKN)simulating spliced-connection interface was performed.