DESIGN AND CONSTRUCTION OF AN APPARATUS TO PERFORM HYDROLYSIS TESTS IN POLYMERIC YARNS AND MOORING ROPES |
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| R. da S. Correa, F. T. Stumpf |
- Abstract:
- Throughout the extent of its life, a mooring line used in an offshore oil platform working in deep and ultra-deepwater is subjected to the environmental conditions present at seabed. Along with low water temperature, high salinity, and acidity, the materials capacity of absorbing water plays an important role when it comes to its mechanical behavior in service conditions.
Previous studies have shown that the longer a synthetic rope is in contact with seawater, both its force-elongation behavior and its ultimate strength are affected. The phenomenon of the materials water absorption is known as Hydrolysis, and typically this type of experiment can take several months to a few years until observable results can be noticed. One way to speed-up the hydrolysis process is to subject the samples to high temperature water, and then stipulate a correlation factor between the results of the experiment time at high temperature and the real time at low temperature. This way one can have an accurate prediction of how long it will take until a material loses a certain percentage of its ultimate strength at a low temperature water, having the samples tested on a shorter period of time at higher temperature water.
The aim of this paper is to propose the development of an apparatus specially designed to perform hydrolysis tests on synthetic fiber ropes and yarns. Variables such as water temperature, along with its composition, acidity and salinity will be monitored and controlled, so that different combinations of these factors and their influence on the mechanical behavior of those materials can be studied. - Keywords:
- synthetic mooring ropes, hydrolysis, ultra-deepwater
- Download:
- IMEKO-YSESM-2014-005.pdf
- DOI:
- -
- Event details
- IMEKO TC:
- TC15
- Event name:
- TC15 Youth Symposium 2014
- Title:
13th Youth Symposium on Experimental Solid Mechanics
- Place:
- Děčín, CZECH REPUBLIC
- Time:
- 29 June 2014 - 02 July 2014