Laminated glass consisting of two soda lime glass plies adhered by a polyvinyl butyral interlayer (PVB) is used for automotive glazing. This paper describes the application of a dynamic, nonlinear finite element method to investigate the failure modes of a laminated glass subjected to low-velocity impact with a spherical headform. Crack type, crack location and crack initiation time are evaluated using the maximum principal stress and J-integral criterion. Failure occurred due to flexural stresses and not bearing stresses. The first crack always initiated at the center of the outer impacted ply and PVB interface, and later on the exterior surface of the inner ply. The PVB thickness and velocity of impact had little or no effect on the first crack initiation. The work provides the framework for the future development of an oblique 3-D simulation to simulate the real impact condition. Hertzian cone does not occur when a headform normally impacts a laminated glass plate.
Modeling fracture in laminated automotive glazing impacted by spherical featureless headform
Materialbruchmodell einer Fahrzeugglasierung unter dem Aufprall einer beliebigen sphärischen Fläche
2003
9 Seiten, 12 Bilder, 34 Quellen
Aufsatz (Konferenz)
Englisch
Modeling fracture in laminated automotive glazing impacted by spherical featureless headform
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