The critical mechanism in the post-glass-breakage response of laminated glass is delamination of polymeric interlayer from glass shards. To investigate adhesion properties between glass and PVB, "Through-Cracked-Tensile" tests have been performed at room temperature, with different stain rate and polymer thickness. Using photoelastic properties of PVB, the stress has been detected during the test, while measuring force-displacement and force-delamination diagrams. Two different failure modes have been recognized, influenced by the presence of friction while relative sliding between the two materials occurs. A steady delamination takes place only when friction is not present; on the other hand, friction can arrest delamination, and the interlayer eventually breaks. Results have been interpreted though a minimal model that predicts the delamination load.
Through-cracked tensile delamination tests with photoelastic measurements / Ferretti, Daniele; M., Rossi; ROYER CARFAGNI, Gianni. - STAMPA. - (2012), pp. 641-652. (Intervento presentato al convegno Challenging Glass 3 tenutosi a TU Delft (Ne) nel June 28—29) [10.3233/978-1-61499-061-1-641].
Through-cracked tensile delamination tests with photoelastic measurements
FERRETTI, Daniele;ROYER CARFAGNI, Gianni
2012-01-01
Abstract
The critical mechanism in the post-glass-breakage response of laminated glass is delamination of polymeric interlayer from glass shards. To investigate adhesion properties between glass and PVB, "Through-Cracked-Tensile" tests have been performed at room temperature, with different stain rate and polymer thickness. Using photoelastic properties of PVB, the stress has been detected during the test, while measuring force-displacement and force-delamination diagrams. Two different failure modes have been recognized, influenced by the presence of friction while relative sliding between the two materials occurs. A steady delamination takes place only when friction is not present; on the other hand, friction can arrest delamination, and the interlayer eventually breaks. Results have been interpreted though a minimal model that predicts the delamination load.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
