Previous research led to the conclusion that the Engagement Ratio (i.e. the coupling length over the coupling diameter, ER) significantly affects the shear strength of an epoxy adhesive (LOCTITE 9466). The aforementioned studies were performed at room temperature; whereas, the effect of ER combined to that of temperature is currently unexplored and is the subject of the present paper. Decoupling tests were performed at three temperature levels (40°C, 60°C and 80°C), involving Pin-and-Collar samples with four different levels of ER. A fixture device was designed to prevent misalignments and heat dissipation during the pushing-out phase. The statistical processing of the data highlighted ER effectiveness up to the temperature of 40°C with strength enhancement for ER around 1.3. Conversely, at the highest levels of temperature, the effect of ER is no longer significant to compensate strength decrease and a highly significant negative interaction involves ER and temperature.
Croccolo, D., De Agostinis, M., Fini, S., Olmi, G. (2015). How the Engagement Ratio affects the shear strength of an epoxy adhesive at different temperature levels. Padova : Padova University Press.
How the Engagement Ratio affects the shear strength of an epoxy adhesive at different temperature levels
CROCCOLO, DARIO;DE AGOSTINIS, MASSIMILIANO;FINI, STEFANO;OLMI, GIORGIO
2015
Abstract
Previous research led to the conclusion that the Engagement Ratio (i.e. the coupling length over the coupling diameter, ER) significantly affects the shear strength of an epoxy adhesive (LOCTITE 9466). The aforementioned studies were performed at room temperature; whereas, the effect of ER combined to that of temperature is currently unexplored and is the subject of the present paper. Decoupling tests were performed at three temperature levels (40°C, 60°C and 80°C), involving Pin-and-Collar samples with four different levels of ER. A fixture device was designed to prevent misalignments and heat dissipation during the pushing-out phase. The statistical processing of the data highlighted ER effectiveness up to the temperature of 40°C with strength enhancement for ER around 1.3. Conversely, at the highest levels of temperature, the effect of ER is no longer significant to compensate strength decrease and a highly significant negative interaction involves ER and temperature.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
