Theoretical investigations of the interfacial sliding and buckling of graphene on a flexible substrate

Abstract

Two interfacial failure modes, shear sliding and buckling, of graphene on a flexible substrate subjected to uniaxial compression are investigated. The shear sliding starts at the edge region, and buckling starts at the middle region of graphene. Using shear-lag cohesive zone models and finite element (FE) simulations, the critical strain and maximum strain of graphene are predicted for the interfacial sliding failure. Then, the critical strain for the onset of buckling is derived via the theory of continuum mechanics with the van der Waals (vdW) interaction between graphene and the substrate surface taken into consideration. By comparison of the two critical failure strains and maximum strain of graphene, it is found that there exists a critical length of graphene. As the graphene length is larger than it, interfacial failure goes through four stages of development with increasing loading, including sliding and buckling. Conversely, the buckling of graphene will not occur. Finally, the influence of the interfacial adhesion energy and geometric size of graphene on the critical strains for interfacial sliding and buckling are discussed.

Structural Effects of Crumpled Graphene and Recent Developments in Comprehensive Sensor Applications: A Review

“…[ 22 ] Numerous researchers have studied the generation of ripples, folds, wrinkles, or crumples on graphene sheets and the use of such corrugations in a controlled manner. [ 23–31 ] Wrinkling is a relatively common physical phenomenon in thin sheets and membranes. [ 32,33 ]…”

“…[22] Numerous researchers have studied the generation of ripples, folds, wrinkles, or crumples on graphene sheets and the use of such corrugations in a controlled manner. [23][24][25][26][27][28][29][30][31] Wrinkling is a relatively common physical phenomenon in thin sheets and membranes. [32,33] Due to its potential uses in sensors and capacitors, developing graphene crumple structures is one of the most important current topics in cutting-edge materials.…”

Enhancement of Mechanical Properties of Multilayer Ceramic Capacitors through a BaTiO3/polydopamine Cover Layer

“…High strength and adhesiveness are required for the insulated cover layer of an MLCC. The poor interfacial adhesion properties of cover layers result in delamination in buckling and detachment modes (Figure 1a) [2]. These local interfacial defects remain after sintering and initiate crack propagation [1].…”

“…In addition, PVB with a hydroxyl group is favorable for hydrogen bonding, which can be explained by its interactions with polymers, liquids, and particles in the BT slurry [6,8,9]. This interaction improves adhesion between the sheets, reducing the occurrence of de-lamination in the buckling and detachment modes [2,6]. Hence, it is important to enhance the adhesion of the material to the polymer composites.…”

Sliding Dynamics of Parallel Graphene Sheets: Effect of Geometry and Van Der Waals Interactions on Nano-Spring Behavior

“…The sliding motion between concentric CNTs or adjacent graphene sheets is controlled by van der Walls (vdW) interactions [15][16][17], which depend on the relative position between the nanoconstructs and determine whether they are in a stable, unstable, or metastable configuration. The modern synthesis techniques available in the nanotechnology field allow the production of MWCNTs with precisely controlled chirality and, thus, equilibrium configuration [18][19][20][21].…”