A size-dependent model for predicting the mechanical behaviors of adhesively bonded layered structures based on strain gradient elasticity

Abstract As adhesively bonded layered devices scale down, micro-scale adhesive layers become common and play a key role in the overall performance of micro devices. Herein, we use strain gradient elasticity to characterize propose an analytical size-dependent model predict mechanical behaviors structures. The results indicate that local interfacial tractions global adherend displacement both show strong size effects, especially for soft adhesives with low modulus. When ratio layer thickness its material characteristic length (on order microns), representing structures, decreases unity, increase substantially significantly. Meanwhile, is insensitive present study reveals stiffening which are attributed large gradients constrained layers. can help us deformation achieve high by bonding.