Journal
MACROMOLECULAR MATERIALS AND ENGINEERING
Volume 301, Issue 6, Pages 694-706Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/mame.201500431
Keywords
materials science; polymeric materials; simulation; theoretical material constitutive model; user-defined material subroutine
Funding
- National Research Foundation of Korea (NRF) - Korea Government (MSIP) [2015R1A2A1A15052688, GCRC-SOP 2011-0030013]
- National Research Foundation of Korea [2015R1A2A1A15052688] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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Recently, liquefied natural gas (LNG) is a focus of interest around the world for several reasons, and LNG cargo containment systems (CCS) increase in quality to prevent loss of LNG during shipping. For insulation of CCS, polyurethane foam (PUF), an outstanding insulation material, is commonly used. However, until now, although its mechanical properties are relatively good, the material is not considered as a structural member under compressive loading, principal load direction in CCS. Moreover, as PUF is a porous material by mixing and foaming, its mechanical properties depend on voids, which is a dominant parameter for density. Therefore, in the present study, nonlinear behavior of PUF is described using Gurson model with a novel technique, i.e., an acceleration factor. The model expresses the behavior through the volume fraction of voids with consideration of the density effect to evaluate structural performance using user-defined material subroutine with explicit and implicit methods.
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