Cryogenic impact resistance of chopped fiber reinforced polyurethane foam

Yu, Young Ho; Nam, Soohyun; Lee, Dongyoung; Lee, Dai Gil

doi:10.1016/j.compstruct.2015.05.021

Cited by 23 publications

(12 citation statements)

References 35 publications

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“…When the impactor strikes metallic plate without buffering materials, it generates a remarkable acceleration and contact force [2]. A cushioning material can absorb and store the impact energy, hindering the impactor and decelerating the impact speed to mitigate a contact force.…”

Section: Resultsmentioning

confidence: 99%

“…Flexible PU foams are made of polyether polyol with a specific weight of 1.05 g/cm 3 (CST-1076A Keshengda Trading, China) and isocyanate with a specific weight of 1.25 g/cm 3 (CST-1076B, Keshengda Trading, China). Nylon nonwoven fabrics (Far Eastern New Century, Taiwan) have a fabric weight of 200 g/m 2 . The WSFs (YT-0638, Huayu Weaving, Jinjiang, Fujian, China) have a mesh size of 4 mm, a thickness of 5 mm, top/bottom layers being composed of 200 D polyester monofilaments, and a spacer layer being composed of 30 D polyester monofilaments.…”

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

“…Specifically, polyurethane (PU) foam is popular in the industrial field due to a light weight and ease of processing. The majority of studies emphasized the improvement in mechanical properties and impact resistance of PU foam [2,3]. Moghim et al [4] studied how the content of SiO 2 nanoparticles influenced the mechanical properties of PU foam, interpreting the mechanism of cell formation caused by nanoparticles.…”

Section: Introductionmentioning

confidence: 99%

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Spacer fabric/flexible polyurethane foam composite sandwiches: Structural design and quasi-static compressive, bursting and dynamic impact performances

Wang

et al. 2019

Jnl of Sandwich Structures & Materials

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Nylon fabrics are used as the reinforcing upper layer. A warp-knitted spacer fabric that is saturated with flexible polyurethane foam is used as the lower layer. They are combined in order to form innovative impact energy absorbent composite sandwiches employing a two-step foam process. The quasi-static compressive strength, bursting strength, and dynamic shock cushioning characteristic of the composite sandwiches are evaluated, the latter of which is tested using a drop weight impact tester in order to simulate the impact resistance corresponding to complex environments. The experimental results suggest that a combination of warp-knitted spacer fabric increases the compressive strength and bursting strength of composite sandwiches by 107% and 60%, respectively. The shapes of impactors determine the contact force and dynamic impact time. The greater contact area results in the smaller contact force, indicating that the composite sandwiches have greater cushioning efficacy. Designed with a gradient combination, the flexible polyurethane foam strongly bonds the upper polyamide nonwoven fabric and the lower warp-knitted spacer fabric. The optimal compression resistance, a bursting strength of 1677 N, and a maximum energy absorption of 90% at a 15 J impact energy are presented. The innovative composite sandwiches have a promising perspective in packaging and individual impact protection in the future.

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Section: Resultsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Spacer fabric/flexible polyurethane foam composite sandwiches: Structural design and quasi-static compressive, bursting and dynamic impact performances

Wang

et al. 2019

Jnl of Sandwich Structures & Materials

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“…Generally, the mechanical strength of the PUF is improved by including a filler material during its fabrication. In previous studies, diverse additives such as glass fibers, [19][20][21][22][23] carbon, 11,24,25 silica, 26 graphene, 27 and nanoparticles 28 have been applied as filler material. For example, Yu et al 19 showed that adding 10 wt% of chopped fiber to PUF improves the mechanical strength by 50% at cryogenic temperatures.…”

Section: Introductionmentioning

confidence: 99%

Impact behavior of hollow glass bubble reinforced foam core LNG insulation panel in cryogenic temperature

Lee

Bae

Hwang

et al. 2020

Journal of Composite Materials

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Composite sandwich panels are applied to numerous structures owing to their excellent mechanical properties and thermal performance. In marine craft, sandwich panels are located on the inner walls as an insulation system for the liquefied natural gas (LNG) cargo containment systems (CCSs). Polyurethane foam (PUF), as an insulation material, is commonly used as the core material against a cryogenic temperature of –163°C for the LNG CCSs. Owing to its excellent thermal performance that prevents heat flow from the outside, and because LNG is transported at cryogenic temperatures, PUF is the preferred choice as a core material. However, the LNG CCS is subjected to fluid impact load due to sloshing during a laden voyage, and therefore, the core material needs to be reinforced. In this study, a reinforcement material made of hollow glass bubbles (HGBs) was added to PUF to help withstand the sloshing loads, and the performance of the specimens was investigated in terms of their impact strength and absorption energy. The mechanical impact strength of the final products was investigated through an impact test at cryogenic temperatures and the absorption energy was analyzed along with the dynamic compressive behavior of the sandwich panels.

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Preparation and application of high sound insulation polyurethane composite film through glass fiber reinforcement

Liu,

Zhan,

et al. 2023

J of Applied Polymer Sci

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Laminated glasses have been widely used in buildings, physical protections, and vehicles because of their safety, sound insulation, thermal insulation, and other performance. In recent years, the high sound insulation performance of laminated glass intermediate films in the frequency range of low or high frequencies has attracted more and more attentions. In this work, a glass fiber/polyurethane elastomer composite (PU‐MGF) film with high transparency and impact resistance has been successfully synthesized, 5 dB of the transmission loss increased at 1600–6000 Hz, and 3.6 dB increased at 63–1600 Hz compared with the control polyurethane film. This is a significant progress in the laminated glass industry. In addition, the transmittance of the composite reaches over 75%. The excellent impact resistance of the laminated glass, based on PU‐MGF film, has been confirmed through falling ball impact test, demonstrating its ability to withstand multiple impacts without spattering. The PU‐MGF film prepared in this work exhibits great potential for applications in building windows, transportation, and soundproof devices.

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Cryogenic impact resistance of chopped fiber reinforced polyurethane foam

Cited by 23 publications

References 35 publications

Spacer fabric/flexible polyurethane foam composite sandwiches: Structural design and quasi-static compressive, bursting and dynamic impact performances

Spacer fabric/flexible polyurethane foam composite sandwiches: Structural design and quasi-static compressive, bursting and dynamic impact performances

Impact behavior of hollow glass bubble reinforced foam core LNG insulation panel in cryogenic temperature

Preparation and application of high sound insulation polyurethane composite film through glass fiber reinforcement

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