Power cables and umbilicals. Conductor strain under pure bending

In order to be able to predict the lifetimes of subsea cables and to minimise the risks of their failure whilst being laid, it is essential that the stresses and strains suffered by each element be understood. This paper concerns the development of an accurate analytical method by which the detailed strain variations across a cable cross-section and across individual cores may be described. It differs from previous work in that it does not rely on the assumption of thin wires, which is not appropriate for many types of cable. It also includes the effects of finite frictional forces between the conductors and surrounding layers.