The Attenuation of Shock Waves in PU Foam and its Application

Lee, M. P.; Wang, G. M.; Sung, Po‐Hou; Chang, Wen-Liang; Lee, Y. L.; Lin, Kwang‐Lung

doi:10.1007/978-1-4613-2207-8_101

Cited by 4 publications

(2 citation statements)

References 3 publications

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“…The energy dissipation ability stems from the porous structure of the PU foam. Lee et al (1986) studied shock wave attenuation in various polymeric foams and concluded that PU foams have the greatest ability of shock wave energy dissipation among other types of foams. Hartman et al (2006) examined foams with different porosity ratios and compared their ability in blast response mitigation.…”

Section: Introductionmentioning

confidence: 99%

Performance assessment of rigid polyurethane foam core sandwich panels under blast loading

Andami

2019

International Journal of Protective Structures

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The performance of rigid polyurethane foams, as an energy absorbent core of sandwich panels covered with two exterior steel sheets, was investigated numerically through finite element methods. After verifying the finite element model, numerical studies were conducted to investigate the role of thickness and density of the foam layer in the response behavior of sandwich panels under blast loads. A set of cylindrical polyurethane foam specimens were manufactured at five different nominal densities, 90, 140, 175, 220, and 250 kg/m3, and their stress–strain curves were evaluated using uniaxial compression tests. The test data were then employed to define characteristics of the polyurethane foams in the finite element model. Based on the results of finite element analysis runs, the optimum density of the foam layer was determined by assessing two response parameters including the peak pressure transmitted to the back face of the foam layer and the maximum deflection of sandwich panel. These response parameters were found to be affected differently by variations in the density of the foam layer within the panel. An increase in the thickness of the foam layer, to a certain extent, was found to be beneficial to the mitigation capability of sandwich panel.

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Section: Introductionmentioning

confidence: 99%

Performance assessment of rigid polyurethane foam core sandwich panels under blast loading

Andami

2019

International Journal of Protective Structures

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“…A common approach for shockwave mitigation is to utilize heterogeneous material structures that cause the shockwave to scatter at the interfaces, including porous materials, , nanocomposites, − and multilayered composites. − Since the reflection of shockwaves is achieved by differences in impedance, the material design must consider the precise sequence of layers, the impedance/density of each layer, and porosity. In porous composites, Nesterenko reported that pores of insufficient size enhance the intensity of shockwave pressure .…”

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confidence: 99%

Effect of Polymerized Ionic Liquid Structure and Morphology on Shockwave Energy Dissipation

et al. 2019

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The ability of nanosegregated polymerized ionic liquids (PILs) to dissipate shockwave energy is investigated for a series of imidazolium-based PILs with varying alkyl spacer length. The PILs are designed to have similar glass transition temperatures but different structures. X-ray scattering analysis reveals that each of the amorphous PILs exhibit distinct nanoscale structural heterogeneity, depending on the length of the chain spacer. We find that a higher structural heterogeneity, determined from the intensity of the intercluster scattering peak, in the PILs with longer alkyl spacers results in greater shockwave energy dissipation. In addition, we observe the crystalline phase is less effective at dissipating shockwave energy than the amorphous phase due to the close packed morphology and slow kinetics.

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Transformation of Shocks in Laminated and Porous Materials

Nesterenko

2001

Dynamics of Heterogeneous Materials

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The Attenuation of Shock Waves in PU Foam and its Application

Cited by 4 publications

References 3 publications

Performance assessment of rigid polyurethane foam core sandwich panels under blast loading

Performance assessment of rigid polyurethane foam core sandwich panels under blast loading

Effect of Polymerized Ionic Liquid Structure and Morphology on Shockwave Energy Dissipation

Transformation of Shocks in Laminated and Porous Materials

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