hrvatski

Mechanical failure of overhead power line conductors

We seek to quantify the fretting mechanisms which lead to failure of overhead power line conductors. One can strongly benefit here from usage of powerful numerical tools and nonlinear finite element method. The problem of such kind requires an approach based on multi-physics and multi-scale models. Namely, each conductor is composed of single strands wrapped together which interact with each other leading to complex anisotropic behaviors. Damage mostly occurs at the positions of clamps where clamping devices hold the conductor [1]. Multi-scale methodology is proposed, where conductor is observed at macro, meso and micro scale. In this work we present the macro-scale model where conductor is represented with geometrically nonlinear cable element [2], while part of the cable which is positioned inside the clamping devices is modeled as Timoshenko beam finite element with embedded strong discontinuities [3] capable to provide failure mechanism of the clamped part of the conductor.

transmission lines, power line conductors

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