CONSTRUCTION OF AN EQUIPMENT TO PERFORM CREEP EXPERIMENTS IN SYNTHETIC YARNS SUBMERGED IN LOW TEMPERATURE WATER

L. S. Da Silva, C. E. M. Guilherme

Abstract

Unlike most metallic materials, some synthetic materials are known to exhibit a very prominent creep behavior. Additionally, among many other variables, this type of effect is highly dependent on the material temperature. The aim of this work is to study the creep behavior of synthetic ropes used in the anchorage of offshore platforms working in deep and ultra-deepwater. In these regions the low temperature of the water affects directly the behavior of the synthetic materials when subjected to permanent tensile loads. These results are shown in a displacement-time graph, in which the three creep phases are identified by the slope of each curve. The creep test is characterized by the application of a static load with the purpose to observe the deformation of the synthetic material over time. The loadings applied in this paper are relative to 5%, 20% and 45% MBL (medium break load of the material). To perform such test, this paper details the project of an equipment in which the specimens will be positioned vertically and submerged into water at 4 °C ± 1 K. The load will then be applied in a lever-type mechanism. This type of system is relatively simple and requests a minimum friction between its mechanical components. The data are recorded by a digital system during the test time.

Keywords

creep, synthetic material, low temperature

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IMEKO-YSESM-2014-026.pdf

DOI

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IMEKO TC

TC15 - Experimental Mechanics

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