Electrical cables design using tea pipe

Abstract

At the present time, cable design is based on trial and error tests and experimental data obtained from long-time experience of previous models. Because of that, there can be found some limitations in their design as well as time consuming tests with low reproducibility. In this work is studied the nonlinear behavior of two electric cables types, a single and a double twisted cable, under three di erent loading conditions: traction, bending and torsion. Results from experimental tests under same loading conditions were analyzed in order to simulate similar force-deformation curves. Several material models were applied to both cable types, fi nding the most accurate results with a viscoplastic model based on Chaboche law with isotropic hardening. Unknown material parameters required for each model were established comparing simulated models with experimental results. A parametric study was accomplished in order to determine which geometric and material parameters had a greater infuence on both models. Double cable lay angle was also studied, having the more infuence in traction and bending tests. In this study, internal friction and slipping conditions were neglected since the fi nal goal of this work is oriented to defi ne a homogeneous cable section.