THEORETICAL AND PRACTICAL ASPECTS OF CONDUCTING A MAJOR COMPOSITE REPAIR

摘要

This paper discusses the theoretical and practical processes carried out as a result of sustaining substantial structural damage to an RNLI lifeboat built from advanced epoxy-based composites. An initial survey of the 16m Tamar class lifeboat was conducted to assess the location and likely extent of the damage. Having carried out a localised strip out, a more detailed survey involving skin and core sampling and non-destructive evaluation was completed. This evaluation included a range of techniques to assist in the definition of the repair scope and included shearography, ultrasonics and thermography. In parallel with the practical aspects, the paper also discusses the part that theoretical calculations and finite element analyses played in quantifying the loading scenario, supporting the structural repair process and informing subsequent future design reviews. Finally, conclusions are drawn and comparisons made with other major repairs that have been carried out and are recorded in the public domain.