During vehicle accidents, occupant's head impacting on windshield or side window is commonly observed. Any attempt to design glazing that minimizes injury to and death of occupants during a vehicle accident requires a thorough understanding of the mechanical behavior of automotive glazing subjected to head impact loads. A continuum damage mechanics based constitutive model with linear damage evolution law is applied to model the damage of glass plies. The damage pattern and zone size are predicted. The non-impact side glass ply thickness plays a critical role in the impact resistance of laminated glass. The optimal design from the four cases considered in the study corresponds to the case in which impact side glass ply is thinner. A weight reduction can be achieved without compromising impact resistance. The impact side glass ply and PVB interlayer thickness have no significant effect on the impact resistance. Increasing the laminated glass panel area would decrease the extent of damage. Laminated glass experiences less damage than the monolithic glass of the same total thickness.
Analysis of damage in laminated automotive glazing subjected to simulated head impact
Schadensanalyse einer mehrschichtigen Automobilverglasung durch simulierten Kopfaufprall
Engineering Failure Analysis ; 13 , 4 ; 582-597
2006
16 Seiten, 13 Bilder, 1 Tabelle, 29 Quellen
Article (Journal)
English
Crack initiation on laminated automotive glazing subjected to simulated head impact
Automotive engineering | 2005
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