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Articles 31 - 33 of 33

Full-Text Articles in Engineering Science and Materials

Ecocomposite Materials, David A. Bainbridge Jan 2001

Ecocomposite Materials, David A. Bainbridge

David A Bainbridge

If we are wise we can make a transition to the Age of Ecocomposites with virtually no pollution. Ecocomposite materials are those made with natural fibers and resins and can be produced in sustainable agro-industrial ecosystems. These materials can reused, recycled or returned to nature by grinding, composting, biological breakdown, or benign solvents. Historical use and recent rediscovery of these materials has suggested the many advantages (and challenges) using these materials offer to designers and engineers.


Parametric Excitation Of An Axially Moving Band By Periodic Edge Loading, W-Z Ben Wu, C. D. Mote Oct 1986

Parametric Excitation Of An Axially Moving Band By Periodic Edge Loading, W-Z Ben Wu, C. D. Mote

Civil, Architectural and Environmental Engineering Faculty Research & Creative Works

Simple torsion parametric resonance and combination torsion-bending parametric resonance can be excited in an axially moving band by an in-plane periodic edge loading that is normal to the longitudinal axis of the band. The model simulates band saws, belts, magnetic tapes and like systems under edge forces. Sum combination instabilities, in particular, permit the excitation of low frequency resonances by higher frequency edge forces. Simple bending, combination torsion-torsion, combination bending-bending and difference type parametric instabilities are not excited by periodic normal edge forces. The space of band parameters leading to parametric instability shrinks with increasing axial tension and with increasing …


Vibration Coupling In Continuous Belt And Band Systems, C. D. Mote, W-Z Ben Wu Sep 1985

Vibration Coupling In Continuous Belt And Band Systems, C. D. Mote, W-Z Ben Wu

Civil, Architectural and Environmental Engineering Faculty Research & Creative Works

Small transverse oscillation of an endless band supported by wheels couples the response of the free spans of the band to oscillation of the wheels. The coupling arises from the finite curvature of the free spans of the band when its bending stiffness is finite. Significant modeling error can occur if a single span of the band is modeled as a simply supported, axially moving beam. The coupling provides an opportunity to dissipate vibration energy. Experiments and finite element analyses support the coupling discussion presented. © 1985 Academic Press Inc.