Modeling of single-lap joints with auxetic adhesive utilizing homogeneous and heterogeneous bondline microstructures

• DOI: 10.1016/j.heliyon.2024.e24141
• Publication Date: 2024-01-05T17:08:30Z
• Authors: Chatarina P. Pusp...; Annisa Jusuf; Bambang K. Hadi; Arief Yudhanto
• Keywords: Auxetics; Lap joint; Adhesive Bonding; Poisson's ratio

Producing lightweight structures can be effectively achieved using adhesive bonding that incorporates a high-performance adhesive, eliminating the mechanical joints (rivet, bolts). Here, proof-of-concept of tailoring microstructures exhibiting negative Poisson's ratio (auxetic) is investigated two single lap joint (SLJ) models developed in ABAQUS/Standard. The SLJ consist rigid adherends are bonded either homogeneous or heterogeneous produces auxetic response. In value defined part models. obtained by explicitly building orthogonally-arranged elliptical voids addition, adherend-adhesive interface represented cohesive elements with bi-linear traction-separation rule. effects different and thickness on peel shear stresses, as well failure mechanism strength, evaluated. We found effect response more profound model rather than one, where strength enhancement could achieve 45 % reference to baseline model. embedded between able activate ligaments, not merely adhesive. Our proposed modeling strategy starting point further approach utilizing