The adhesive and cohesive failures are classified by the surface roughness of the peeled off backsheet strips. Different DH testing condition leads to different dominating failure modes. The adhesive failure is the main failure mode at lower testing temperature, which has been masked by the mixed ...
(fracture resistance), and elongation. Mechanical engineering principles are applied to ensure that the joint can support the necessary load. A properly designed adhesive joint will provide for adherend failure rather than adhesive failure unless the joint is designed to be reworked or reused. ...
i.e. diffusion of polymer rubber chains must be achieved across the interface between the two films to produce intimate adhesion at molecular level. The application of pressure and/or temperature for a given time allows the desired level of intimate contact (coalescence...
Therefore, adhesion and cohesive energy of weaker interfacial layers are equally based on the possibility that fracture should not spread only through the interfaces of adhesive substrates, as the cohesive failure inside the weaker materials close to the interfaces is highly possible[32]. The ...
The failure mechanisms of an adhesive layer are generally separated into adhesive failure and cohesive failure. A failure is considered to be adhesive when it takes place in a thin boundary layer at the interface of the adhesive and the adherend, and cohesive when it is in the interior of th...
which is the specimen bending point. It is also possible to select the diameter of the roll to adjust the location of the cohesive failure in the joint. In the case a small-diameter roll, the cohesive failure occurs at the flexible element. However, if a larger-diameter roll with employed...
Cohesive zone modelingIn this work, Cohesive Zone Modelling (CZM) was used to simulate failure of T-peel bonded joints with 1.5mm thick adherends, respectively, bonded toghether with Loctite Multibond 330 adhesive. The fracture toughness and load-opening behaviour recorded in previous experiments on...
of vinyl-terminated PDMS, a methyl-hydrogen siloxane crosslinker and a platinum catalyst. The equal forces obtained when detaching cyprids and juvenile barnacles from PMMA and PDMS was found to be due to the cohesive failure occurring in the cyprid/barnacle part of adhe...
Cohesive strength and integrity of the cured adhesive layer. A measurement of potential adhesion only is possible, restricting (1) to an assessment of the adherend surface characteristics prior to bonding through visual inspection, wettability tests, or surface potential difference techniques (for monito...
(1) the adhesive splits apart, leaving portions of the adhesive adhered to both metal surfaces in a cohesive failure mode; (2) the adhesive pulls away from either metal surface in an adhesive failure mode; or (3) a combination of adhesive and cohesive failure (i.e., mixed mode failure)...