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Development of a Test Device for Evaluation of Thrown Object Hazards

Published by the American Society of Agricultural and Biological Engineers, St. Joseph, Michigan www.asabe.org

Citation:  Journal of Agricultural Safety and Health. 9(2):119-131 . (doi: 10.13031/2013.13002) @2003
Authors:   M. W. Veal, S. E. Taylor, R. B. Rummer, J. W. Baier
Keywords:   Forest engineering, Operator protective structures (OPS), Operator safety, Thrown objects

Highspeed chains or rotating disks are commonly used to cut and process trees during forest harvesting operations. Mechanical failure or fatigue of these tools can lead to a potentially hazardous situation where fragments of chain or sawteeth are thrown through the operator enclosures on forest machines. Therefore, a test device is needed to evaluate the ability of a forest machine cab to resist puncture by thrown objects. This articles details the development of a highpressure pneumatic launch system that propels sawteeth and chain fragments at velocities in excess of 150 m/s. This article also discusses the performance of the device following the first series of projectile launches.

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