Poisson ratio of light transversely isotropic foam plastics

Abstract In this paper, radial vibrations of an infinitely long fluid-filled transversely isotropic thick-walled hollow composite poroelastic cylinder are investigated in the framework of poroelasticity. The cylinder consists of two concentric cylindrical layers namely, core (inner one) and coating (outer one), each of which retains its own distinctive properties. A comparative study has been made between the thick-walled hollow composite poroelastic cylinder and that of fluid-filled one. Frequency is computed against the ratio between the thickness to inner radius of the composite cylinder at various anisotropic ratios. Another comparative study is made between the results of current case and that of isotropic case by making Young’s modulus and Poisson ratio values of isotropic and that of transversely isotropic in the transverse direction equal. Numerical results are depicted graphically and then discussed.

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Micro and meso‑scale modelling of the response of transversely isotropic foam to impact — a structural cell-assembly approach

International Journal of Impact Engineering ◽

10.1016/j.ijimpeng.2019.103404 ◽

2020 ◽

Vol 135 ◽

pp. 103404 ◽

Cited By ~ 2

Author(s):

Pei Li ◽

Y.B. Guo ◽

V.P.W. Shim

Keyword(s):

Transversely Isotropic ◽

Cell Assembly ◽

Structural Cell ◽

Scale Modelling ◽

Isotropic Foam ◽

Meso Scale

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Postmortem and in situ TEM methods to study the mechanism of failure in controlled-morphology high-impact polystrene resin

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100163356 ◽

1996 ◽

Vol 54 ◽

pp. 178-179

Author(s):

R. C. Cieslinski ◽

M. T. Dineen ◽

J. L. Hahnfeld

Keyword(s):

Poisson Ratio ◽

Acrylonitrile Butadiene Styrene ◽

High Impact ◽

In Situ Tem ◽

Styrene Copolymers ◽

Controlled Morphology ◽

Point Bend ◽

Mechanism Of Failure ◽

Impact Energies

Advanced Styrenic resins are being developed throughout the industry to bridge the properties gap between traditional HIPS (High Impact Polystyrene) and ABS (Acrylonitrile-Butadiene-Styrene copolymers) resins. These new resins have an unprecedented balance of high gloss and high impact energies. Dow Chemical's contribution to this area is based on a unique combination of rubber morphologies including labyrinth, onion skin, and core-shell rubber particles. This new resin, referred as a controlled morphology resin (CMR), was investigated to determine the toughening mechanism of this unique rubber morphology. This poster will summarize the initial studies of these resins using the double-notch four-point bend test of Su and Yee, tensile stage electron microscopy, and Poisson Ratio analysis of the fracture mechanism.

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