Disclosed is a compression performance calculating apparatus that can provide such support that anybody can perform the connection design for the terminal fixtures and the core wires easily in a short period of time without depending on the experience of the designer by calculating the contact performance coefficient corresponding to the contact resistance derived from simulations. The displacement of each node that constitutes a core wire model (3m) and a crimping piece model (2m) after a core wire is crimped with a crimping piece is calculated by the finite element method. A node (Ns) in contact with the crimping piece (2m) is extracted from the nodes on the profile of the core wire model (3m) based on the calculated displacement of each node. Then, distance Lk+1 between the extracted node Ns and the node Nk+1 adjacent to the node Ns among the nodes on the profile of the core wire model 3m, and distance Lk-1 between the extracted node Ns and the node Nk-1 adjacent to the extracted node among the nodes on the profile of the core wire model 3m are calculated. Half of the sum of distance Lk+1 and distance Lk-1 is calculated as the contact length Lk of the extracted node Ns. The sum of the contact lengths Lk derived for all the extracted nodes Ns is calculated. The value calculated by dividing the sum of the volume resistivity of the core wire and the volume resistivity of the crimping piece by 8 times the sum of contact lengths Lk is found as the compression performance coefficient.
展开▼
