NDLI: Motor Coach/Bus Crashworthiness Systems: Occupant Retention

Content Provider	The American Society of Mechanical Engineers (ASME) Digital Collection
Author	Stephen, A. Batzer Beltran, David Herndon, G. Grant Chandrashekhar, K. Thorbole Ziejewski, Mariusz
Copyright Year	2009
Abstract	Destructive testing of the complete motor coach/bus restraint system to include seatbelts, side glazing, and greenhouse structure was performed with the objective being to determine the overall rollover crashworthiness in this accident mode. During motor coach/bus rollovers, the roof and pillar structures may deform due to friction and body forces initiated by ground and roadway contact. Body deformation, as well as interaction of the glass with rocks and other debris on the ground and roadway, may lead to catastrophic glazing failure, opening a portal for occupant partial or complete ejection. Despite the relatively high occupant capacity of motor coaches/buses, many commercial designs provide seatbelt restraints only for the purpose of securing wheelchairs and the driver, providing no seatbelt restraints for occupants in passenger positions. Rollover testing was performed on a modified commuter motor coach/bus to determine the effectiveness of the seatbelts as primary restraints, and also on several energy absorbing window designs to determine their efficacy as secondary restraints. The results showed that properly fixated laminated glass and other designs were capable of fully retaining both belted and unbelted occupants during the staged collision. This testing showed that structural roof members and occupant retention glazing systems are feasible solutions for the purpose of occupant retention. The physical testing was complemented by simulations of this accident showing that the loading received by the occupants is not injurious.
Starting Page	521
Ending Page	530
Page Count	10
File Format	PDF
ISBN	9780791843864
DOI	10.1115/IMECE2009-12424
e-ISBN	9780791838631
Volume Number	Volume 13: New Developments in Simulation Methods and Software for Engineering Applications; Safety Engineering, Risk Analysis and Reliability Methods; Transportation Systems
Conference Proceedings	ASME 2009 International Mechanical Engineering Congress and Exposition
Language	English
Publisher Date	2009-11-13
Publisher Place	Lake Buena Vista, Florida, USA
Access Restriction	Subscribed
Subject Keyword	Deformation Roads Laminated glass Glass Roofs Motors Railroad passenger cars Engines Collisions (physics) Gates (closures) Restraint systems Friction Simulation Wheelchairs Buses Rocks Engineering simulation Crashworthiness Failure Testing Accidents Columns (structural)
Content Type	Text
Resource Type	Article

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