小荷重における接触電気抵抗について (II)

抄録

Report (I) described the experimental results of dependence of the electrical contact resistance upon the surface roughness and the size of contact metal. This report theoretically describes the above relation. The mean height difference between the asperity-tips is obtained by the statistical theory. From the result, it was made clear that the mean height difference between the asperity-tips depended on the surface roughness and the apparent contact area. The apparent contact area is proportional to the surface roughness and the radius of sphere or cylinder of contacts, and the contact resistance is a function of the mean height difference between the asperity-tips. Therefore, the contact resistance depends upon the two factors mentioned above.
The author obtained the equations to calculate the electrical contact resistance as a function of the above factors and the load of contacts. The results of calculation agreed well with the ex-perimental results.