Development of application method for fabricating functionally graded adhesive joints by two-component acrylic adhesives with different elastic moduli

Experimental investigation of the effects of adhesive thickness on the fracture behavior of structural acrylic adhesive joints under various loading rates

“…Therefore, they are useful for on-site bonding, such as in repairing damaged parts and assembling large structures [3,6,7]. Moreover, they can be applied to functionally graded adhesive (FGA) joints [8,9] by taking advantage of their mutability of flexibility.…”

Numerical modelling of multi-material graded joints under shear loading

“…After the damage is initiated, by the reaching of the mixed-mode cohesive strength presented in equation 5, the material stiffness is degraded. In the present work, the material separation was modelled by a linear power law for triangular traction separation law and by a tabular power law for trapezoidal, based on the combination of the failure energies in pure Mode I and II, presented in equation (6), where G I and G II are, respectively, the current tensile and shear energy release rate, and G IC and G IIC are the critical energy release rate for pure Modes I and II…”

“…1,3,4 Moreover, the adhesive bonding technique is especially suitable for the transportation industry, where traditional materials as aluminium and steel are joined with lightweight composite materials in order to attain weight reduction, increased fuel savings and the reduction of emissions. 5,6 The single lap joint (SLJ) is the most commonly adopted geometry for industrial applications; 7 however, in SLJs, the stresses distributed along the adhesive layer are minimum on the centre of the bond layer and maximum at edges. [8][9][10] This stress concentration results in a premature failure of the joint.…”

Review of Tailoring Methods for Joints with Additively Manufactured Adherends and Adhesives

“…This section presents and summarizes works which aim to improve the performance of adhesive bonded joints performance with an optimized geometrical design of the adherend in the overlap area. To control the mixing ratio of agents during the adhesive deposition at the overlap, a special apparatus was purposely developed [44], making use of a concept already in use for 3D printing of clay and concrete [45], where the extruder is replaced by an adduction system that allows us to extrude fluids for the liquid deposition modelling process (LDM). Using this apparatus, flexible adhesives were extruded at the end of the overlap end while a stiff adhesive was extruded at the overlap center.…”