Numerical examination of two-dimensional smolder structure in polyurethane foam

Numerical Investigation of the Structure of Density Currents in a two Dimensional Channel

Numerical Investigation of the Structure of Density Currents in a two Dimensional Channel

Anisotropic polyurethane foam

Anisotropic polymer foams have been prepared, which exhibit a Poisson's ratio exceeding 1, and ratios of longitudinal to transverse stiffness exceeding 50. The foams are as much as 20 times stiffer in the longitudinal direction than the foams from which they were derived. The transformation process involved applying a uniaxial stress sufficient to produce 25% to 45% axial strain to open-cell po...

Tests of two new polyurethane foam wheelchair tires.

The performance characteristics of four 24-inch wheelchair tires are considered; one pneumatic and three airless. Specifically, two new airless polyurethane foam tires (circular and tapered cross-section) were compared to both a molded polyisoprene tire and a rubber pneumatic tire. Rolling resistance, coefficient of static friction, spring rate, tire roll-off, impact absorption, wear resistance...

numerical investigation of the structure of density currents in a two dimensional channel

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