Chromic anodized aluminum plates of 25 X 100 X 1.6 [mm.sup.3], were used as
adherends. The average of at least three specimens was taken for each blend.
1 Table 2 Physical and Mechanical Properties of
Adherend (AA 2024-T3) Properties Materials AA 2024-T3 E, MPa 71875 V 0.33 [[sigma].sub.t], MPa 481.9 [[epsilon].sub.t] 0.1587
As a first step,
adherend surfaces of untreated, acetylated, or heat-treated beech wood are evaluated after they have been either planed, using sharp or dull knives, or sanded.
This type of failure reflects the proper
adherend surface preparation and joint.
Effects of
adherend deflections in single lap joints, Int J Solids Struct 3: 2565-2587.
In the breaking of an adhesive bond, energy is dissipated by the bond in many ways, inducting deformation and heating of the
adherends, viscoelastic/plastic flow, and heating of the adhesive.
Gecko's toe pad exhibits numerous free-standing and flexible fibrous structures which can penetrate into surface asperities for enhanced splitting contacts with the
adherend. Once the adhesive and the
adherend are in proximity, there are molecular interactions such as the vdW forces involved in the bond, which contribute significantly to the bond strength arising from millions of contact points of nanofibers.
Although mechanical interlocking clearly promotes the bonding strength between two materials, when considering that good adhesion occurs with a smooth
adherend as well, there should be another type of mechanism which strongly affects the bonding.
Residual stresses are present in cured PI films as a result of solvent loss and differences in coefficients of thermal expansion between the film and
adherend. This stress is affected by temperature and humidity and can affect the SAW response.