Composite materials for vibration damping

Chung, D.D.L.

doi:10.1007/978-1-4471-3732-0_12

Cited by 21 publications

(28 citation statements)

References 54 publications

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“…Further, it has also been observed that defects play an important role in tailoring damping properties. Chung [49] suggested that defects may shift the locations during vibration, acting as internal friction resources leading to higher damping capacities. The presence of porosity further augments the damping capacity due to the heterogeneous stress-strain distribution, causing stress concentrations which results in higher dislocation movements [50].…”

Section: Elastic Modulus and Damping Characteristicsmentioning

confidence: 99%

Significantly Enhancing the Ignition/Compression/Damping Response of Monolithic Magnesium by Addition of Sm2O3 Nanoparticles

Kujur

Mallick

Manakari

et al. 2017

Metals

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Abstract:The present study reports the development of Mg-Sm 2 O 3 nanocomposites as light-weight materials for weight critical applications targeted to reduce CO 2 emissions, particularly in the transportation sector. Mg-0.5, 1.0, and 1.5 vol % Sm 2 O 3 nanocomposites are synthesized using a powder metallurgy method incorporating hybrid microwave sintering and hot extrusion. The microstructural studies showed dispersed Sm 2 O 3 nanoparticles (NPs), refinement of grain size due to the presence of Sm 2 O 3 NPs, and presence of limited porosity. Microhardness and dimensional stability of pure Mg increased with the progressive addition of Sm 2 O 3 NPs. The addition of 1.5 vol % of Sm 2 O 3 NPs to the Mg matrix enhanced the ignition temperature by~69 • C. The ability of pure Mg to absorb vibration also progressively enhanced with the addition of Sm 2 O 3 NPs. The room temperature compressive strengths (CYS and UCS) of Mg-Sm 2 O 3 nanocomposites were found to be higher without having any adverse effect on ductility, leading to a significant increase in energy absorbed prior to compressive failure. Further, microstructural characteristics are correlated with the enhancement of various properties exhibited by nanocomposites.

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Section: Elastic Modulus and Damping Characteristicsmentioning

confidence: 99%

Significantly Enhancing the Ignition/Compression/Damping Response of Monolithic Magnesium by Addition of Sm2O3 Nanoparticles

Kujur

Mallick

Manakari

et al. 2017

Metals

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“…All subsequent composite rods were designed to have approximately half the stiffness of the aluminum rod. The third approach incorporated viscoelastic layers in the composite rods to enhance the damping [3][4] . Specific layering designs, discovered through research, were used to improve damping 5 .…”

Section: Methodsmentioning

confidence: 99%

<title>Granular-filled composite struts for increased damping in hexapod applications</title>

et al. 2003

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A hexapod strut at the University of Wyoming currently exhibits high resonant modes at 3 kHz and above. To reduce these resonant peaks, the current aluminum rod of one of the struts was redesigned. A graphite/epoxy granularly filled composite tube was designed and incorporated into the strut. Reduction in the resonant peaks of up to 32 dB's was achieved. Six of the above mentioned composite tubes were fabricated and incorporated into the hexapod. Testing showed considerable improvement in overall damping for the hexapod.

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“…Chiu and Shiang 29 reported that latex insoles were able to absorb 35% more impact energy than polyurethane insoles, which further highlighted the cushioning properties of latex under low-impact energy conditions. In addition, this high damping property of latex 30,31 also limits the transfer of motion to neighboring areas; hence compression to a region by a body is localized. This is critical in ensuring an even distribution of stress concentration throughout the body.…”

Section: Mechanical Behavior Of Latex and Its Suitabilitymentioning

confidence: 99%

Effects of Mattress Material on Body Pressure Profiles in Different Sleeping Postures

Low

Chua

Lim

et al. 2017

Journal of Chiropractic Medicine

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Objectives: This study compared the body contact pressure profiles of 2 types of mattresses: latex and polyurethane. Methods: Twenty participants were required to lie down on the different mattresses in 3 different postures for 6 minutes, and their body contact pressure profiles were recorded with a pressure mat sensor. Results: The data indicated that the latex mattress was able to reduce the peak body pressure on the torso and buttocks and achieve a higher proportion of low-pressure regions compared with the polyurethane mattress. Conclusions: Latex mattress reduced peak body pressure and achieved a more even distribution of pressure compared with polyurethane mattress across different sleeping postures. (J Chiropr Med 2017;16:1-9)

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Composite materials for vibration damping

Cited by 21 publications

References 54 publications

Significantly Enhancing the Ignition/Compression/Damping Response of Monolithic Magnesium by Addition of Sm2O3 Nanoparticles

Significantly Enhancing the Ignition/Compression/Damping Response of Monolithic Magnesium by Addition of Sm2O3 Nanoparticles

<title>Granular-filled composite struts for increased damping in hexapod applications</title>

Effects of Mattress Material on Body Pressure Profiles in Different Sleeping Postures

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