Rollover analysis of heavy vehicle bus
Rollover is motor vehicle accident that occurs when vehicle is tipping over onto its side or roof. Due to its fatality rate, the Malaysian government reinforced an Economic Commission for Europe of the United Nations (UN/ECE) Regulation no. 66 (R66) upon bus construction. This is to prevent the cata...
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| Main Authors: | , |
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| Format: | Article |
| Published: |
Trans Tech Publications Inc
2014
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| Online Access: | http://dx.doi.org/10.4028/www.scientific.net/AMM.660.633 http://dx.doi.org/10.4028/www.scientific.net/AMM.660.633 http://eprints.uthm.edu.my/6438/1/Rollover_Analysis_of_Heavy_Vehicle_Bus.pdf |
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| Summary: | Rollover is motor vehicle accident that occurs when vehicle is tipping over onto its side
or roof. Due to its fatality rate, the Malaysian government reinforced an Economic Commission for
Europe of the United Nations (UN/ECE) Regulation no. 66 (R66) upon bus construction. This is to
prevent the catastrophic consequences of rollover accidents. The R66 regulation provides an option
of certification based on full-scale vehicle testing that maitaning the survival space. Therefore
research that contribute to the development of safe transportation vehicle under rollover is really
important. The physical prototype of rollover test can be simplified using simulation model. Using
this motivation, the characteristic of heavy vehicle rolleover is investigated in this paper. The
simulation was performed using ANSYS simulation tool and simplified by locating the position of
the bus in unstable equilibriumm, just before it hit the ground. Another method is to perform a
quasi-static loading test. The quasi-static simulation test was performed using impact load that
directed towards the side of beam around the centre of frame body. The dynamic response due to
rollover impact was determined using an Explicit Dynamic Analysis in ANSYS. The stress
maximum stress first developed around the impact area before lag the stress stream to the opposite
side. It can be observed that the maximum stress point is located at the middle structure of impact
side. After few times of impact, the maximum stress starts to changes to the opposite side. Quasistatic
simulation result in higher total deformation on impact side area. It also indicates high
maximum stress point around the middle structure. |
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