Tae-Wook Kim, Seul-Kee Kim, Gi-Beom Park, Jae-Myung Lee
Liquefied natural gas, Leakage, Immersion, Polyurethane foam, Deformation recovery, Compression test
Polyurethane foam composites is widely used in insulation industry. Since the material is exposed the cryogenic environment for a certain period of time, it is essential to estimate the mechanical properties of the material. In this study, compression tests for the polyurethane foam which is recognized as the insulation material for the storage tank of the liquefied natural gas (LNG) were carried out for investigation of the material characteristic of mechanical behavior. To investigate the effect of immersion of cryogenic liquid on polyurethane foam according to immersion time, each compressive test was conductive at five times for reliability, and the test results were obtained by eliminating the maximum and minimum values to reduce experimental error. As a results, Deformation recovery ratio according to the various initial deformation levels were estimated and the mechanical behavior of foams that are experienced compressive deformation was also obtained experimentally. The test results were analyzed based on the conditions of initially applied strain level and engineering strain rate. In addition, the microstructure of the test specimen after the test was analyzed to investigate the relationship between mechanical behavior and immersion time.
Cite this paper
Tae-Wook Kim, Seul-Kee Kim, Gi-Beom Park, Jae-Myung Lee. (2017) A Study on Effect of Immersion on the Mechanical Characteristics of Polyurethane Foam. International Journal of Theoretical and Applied Mechanics, 2, 14-17