Evaluation of the Peel Strength of Adhesives by the Floating Roller Peel Test

Abstract

The peel strength of adhesives can be obtained through the standardized Floating Roller Peel Test (FRPT). On the other hand, computational models of adhesive joints provide insight into the behaviour of these joints under load, providing information for subsequent engineering design. Despite the importance of the FRPT, little numerical modelling in this regard was found in the literature. In this work, a methodology to model the FRPT was developed and validated with experimental data. The proposed numerical model employs the finite element method (FEM) and cohesive zone modelling (CZM) and accurately represents the ASTM D3167 standard, including the interactions with the experimental device following a two-dimensional approach. Furthermore, an explicit solver was employed, and geometrical non-linearities were considered. As a case study, the adhesive Araldite^® 2015 was experimentally tested and then modelled. The evolution of peel strength as the test progresses shows a comparable behaviour in both numerical and experimental data. Despite this, the numerical model shows several similarities with the physical test throughout the simulation, indicating that the model accurately represents the phenomenon. Therefore, it is suitable for further research on adhesive joints subjected to peel loads.