Adhesive behaviour of bonded paper layers: Mechanical testing and statistical modelling

Abstract

In this study, an experimental methodology based on micromechanical testing inside a scanning electron microscope is proposed to characterise bonding of paper layers connected by wet pressing. The peeling force–displacement evolution law that characterises the delamination of micromechanical double cantilever beam specimens of paper tissue have been extracted from such peeling tests. It is observed that the force–displacement evolution curve achieves a steady-state value related to the effective adhesive energy of the interface. This behaviour is explained by examining the complex load transfer mechanism between the layers exerted by cellulose fibrils. A statistical approach is used for the computation of the effective adhesive energy. It is argued that the observed force–displacement evolution law may be satisfactory described by a stochastic model that depends on the distribution function of the fibrils strength, and on two geometrical distribution functions related to the in-plane and out-of-plane fibrils angles with respect to the undeformed interface configuration. Some applications of the proposed model are demonstrated on examples.

Adherend surface roughness effect on the mechanical response of silicone-based adhesive joints

“…Therefore, peeling resistance describes the evaluation of the effective bond strength and of the adhesive fracture energy, which is the energy needed to create a new interfacial area as the peel arm is pulled away from the substrate. Many researchers in a variety of scientific areas have studied the mechanics of peeling for numerous materials, either with theoretical and numerical models or experimentally [8][9][10][11][12]. Based on the achievements reported in the literature, a wide quantity of parameters can influence the mechanical response of the adhesives.…”

Mechanical characterization and failure modes in the peeling of adhesively bonded strips from a plastic substrate

“…Adhesives are being used extensively in various industries due to their noticeable performance. Moreover, fracture characterization of adhesives received a great deal of attention by researchers [1][2][3] and enhancement of interfacial properties is one of the key research topics in this community [4][5][6]. The peel test is one of the most frequently used method to assess the interfacial mechanical properties between adhesive and adherend, and the peel strength is a measure of the force required to separate the peel arm from a substrate [7].…”

A Green’s Function Molecular Dynamics Approach to the Mechanical Contact between Thin Elastic Sheets and Randomly Rough Surfaces

“…Basically, all the spatulae are flattened and stuck on a rough substrate, while the free ends are oriented in the distal direction [8]. In order to understand the origin of the super-adhesive properties of these systems and, later, to reproduce them, a variety of studies, starting from the pioneering contributions of Kendall in the sixties [9], have focused on the peeling mechanism, by which a tape detaches from the flat substrate where it is attached [3,4,5,6,7,8,10,11]. Despite the interesting results obtained in these studies, the majority rely on the assumption of perfectly flat substrates.…”