Evaluation of GRP Rod and Rope Materials and Associated End Fittings

摘要

An extensive and varied test program was carried out on four GRP rod and rope materials to evaluate tensile strengths, moduli of elasticity, flexibility at low temperatures, effects of stimulated Aeolian vibration, and stress-rupture properties at moderate elevated temperatures both with and without high humidity. The effects of elevated temperature on long-term storage capabilities were investigated, and diameter-temperature relationships were established for avoiding buckling due to storage in a coiled condition. The performances of five commercially available end fittings on these materials were examined in terms of the breaking loads attained in tensile tests. Using finite-element analyses, an improved end fitting was developed which is capable of approaching the true tensile strengths of two of the GRP materials. An experimental stress analysis of the improved fitting was performed. (Author)