A temperature- and strain-rate-dependent isotropic elasto-viscoplastic model for glass-fiber-reinforced polyurethane foam

Lee, Chi‐Seung; Kim, Myung-Sung; Park, Seong-Bo; Kim, Jeong‐Hyeon; Bang, Chang-Seon; Lee, Jae-Myung

doi:10.1016/j.matdes.2015.06.086

Cited by 22 publications

(3 citation statements)

References 23 publications

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“…When a violent sloshing acts on the insulation system with a vertical load, a sloshing load is applied to all components of the CCS, which can cause structural failure. Several studies have been conducted to evaluate the behavior and damage of materials and structures applied to CCS [6][7][8][9][10][11]. In these studies, the material nonlinear behavior and failure/fracture features of the primary barrier (austenitic stainless steel), secondary barrier (multi-laminated adhesively bonded joints), and thermal insulation barrier (glass fiber-reinforced polyurethane foam) were experimentally estimated, and a computational analysis method as well as a numerical material model were proposed.…”

Section: Introductionmentioning

confidence: 99%

Experimental Investigation of Structural Response of Corrugated Steel Sheet Subjected to Repeated Impact Loading: Performance of LNG Cargo Containment System

Kim

et al. 2019

Applied Sciences

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The primary barrier in contact with LNG (Liquefied natural gas) cargo is manufactured from stainless steel, and has a corrugated membrane structure due to thermal deformation caused by extreme temperature differences. Because the primary barrier is tailored to be LNG watertight, the structural integrity of the primary barrier must be maintained despite the increase in LNG sloshing load. Among the various types of fluid impacts in a cargo hold, jet flow runs up along the wall of the cargo hold and extreme impact load is exerted on the side of the corrugation of the primary barrier. However, the impact behavior of the primary barrier under the prevailing environment has not been investigated due to the limitation of test methods. Thus, in the present study, the inelastic structural behavior of thin-walled and curved-shaped structures for liquefied natural gas cargo containment systems under repeated impact loading was investigated experimentally. Custom-built structural impact test equipment with large-scale weight drop test facilities was fabricated, and a series of structural impact tests were carried out. The impact energy and the number of repetitions were taken into account in order to investigate the characteristics of the inelastic structural behavior, such as plastic deformation and reaction force time history according to impact energy.

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Section: Introductionmentioning

confidence: 99%

Experimental Investigation of Structural Response of Corrugated Steel Sheet Subjected to Repeated Impact Loading: Performance of LNG Cargo Containment System

Kim

et al. 2019

Applied Sciences

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“…Lee et al (2015) presented a model for glass-fiber-reinforced polyurethane foam studying the temperature and strain rate dependency. Burteau et al (2012) studied the mechanical behavior of polyurethane and nickel foams in detail.…”

Section: Introductionmentioning

confidence: 99%

Simplified model for polyurethane foaming in porous media

Sadrhosseini

Bazkhane

2017

HFF

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Purpose The purpose of the study is to present a simplified model to replace the complicated foaming simulations for investigating the liquid polyurethane behavior just before solidification. Design/methodology/approach This model is inspired from the traveling heater method of crystallization because of the low injection velocity. Besides, the heat generated during the reaction is considered as a heat source function in the energy equation. Findings Various distributions of the heat generation function inside the geometry have been studied to choose the most realistic one. Effect of parameters such as the soil material and porosity on the temperature distribution and flow field are examined for different values of heat flux on the boundaries. Results show an almost linear dependency of pressure drop to the velocity, a uniform velocity profile and an expected temperature distribution compared to literature, which approves the suggested model. Originality/value A new model is presented in this study for foaming which replaces a heat generation function (exponential) in the source term of the energy equation instead of the heat produced at the exit boundary (the solid–liquid interface), and the traveling method is used instead of moving the geometry; besides, the growth ratio has been neglected; therefore, this model has been validated by a foaming simulation to confirm the suggested simplified idea.

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“…The fundamental materials for the production of polyurethane foams are isocyanates (aromatic and aliphatic) and polyols terminated with several hydroxyl groups. The foam properties can be influenced by appropriate selection of isocyanate and polyol components …”

Section: Introductionmentioning

confidence: 99%

Preparation and characterization of rigid polyurethane foams with carbamide and borate groups

Zarzyka

2016

Polymer International

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The results of research on the application of hydroxyethyl urea derivatives modified with boron as polyol components to produce foamed polyurethane materials are presented. The obtained rigid polyurethane foams are characterized by good heat-insulating parameters and decreased flammability. The decrease in flammability of the foams follows from the presence of boron and increased nitrogen content, resulting from the use of polyol with urea groups. The incorporation of boron into the foam structure also results in a substantial increase in the compression strength, compared to classic foams and to non-boron-modified ones. The self-extinguishing foams of high mechanical strength can find application as heat-insulating construction elements for the building industry.

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A temperature- and strain-rate-dependent isotropic elasto-viscoplastic model for glass-fiber-reinforced polyurethane foam

Cited by 22 publications

References 23 publications

Experimental Investigation of Structural Response of Corrugated Steel Sheet Subjected to Repeated Impact Loading: Performance of LNG Cargo Containment System

Experimental Investigation of Structural Response of Corrugated Steel Sheet Subjected to Repeated Impact Loading: Performance of LNG Cargo Containment System

Simplified model for polyurethane foaming in porous media

Preparation and characterization of rigid polyurethane foams with carbamide and borate groups

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