A wide variety of adhesive joints architectures is available, offering several options to the designers, although most common are single-lap (SLJ), double-lap joints, and scarf joints. Additional designs, less used studied stepped-lap, T-joints tubular find application in different types industry, such as aircraft bond stiffeners skin cars between B-pillar rocker. This work numerically evaluate...

Delamination damage is a characteristic which observed in composite laminates. can be very disastrous, hence delamination analysis for any CFRP structure necessary. In this paper epoxy carbon woven (230 GPa) Prepreg laminates was used as the adherend and FM-300K adhesive to form lap shear joint. The model created using ANSYS ACP of done 3D non-linear finite element method. Longitudinal buckling...

Abstract This study investigates the fracture onset and crack deflection in multi-material adhesive joints with thick bond-lines ( ? 10  mm) under global mode I loading. The role of adherend-adhesive modulus-mismatch pre-crack length are scrutinized. parameters controlling path directional stability also discussed. Single-material (i.e. steel-steel GFRP-GFRP) bi-material steel-GFRP) double-cant...

In this study, shear and peel stress distributions in the viscoelastic adhesive layer of a single-lap joint (SLJ) with functionally graded (FG) adherends are investigated. The study focuses on the effect of different adherend profiles and material composition on the time-dependent stress concentration/distribution in balanced and unbalanced SLJs. For this purpose, the Reddy model is applied to ...

Abstract The use of composite materials in structural applications has significantly expanded recent years. transport industry accounts for an increasingly larger share the final weight vehicles, as manufacturers pursue improvements fuel economy, lighter more efficient designs, and reduction emissions. However, delamination adhesively bonded joints causes premature failure bond, inhibiting its ...

Abstract This study investigates the influence of surface free energy (SFE) on adhesion behaviour between wheat dough and bakery-relevant food processing surfaces. In doing so, contact time production-related changes adhesive adherend were taken into account. The measurements conducted by means previously developed methods (modified Chen/Hoseney, measuring cell), whereby force required for sepa...

Abstract This experimental work aims at evaluating the mechanical and failure behavior of adhesive-bonded single-lap joints made a thermoplastic composite 3D-printed via Fused Filament Fabrication technology. Carbon fiber was selected as reinforcement used in form both short continuous fibers embedded Nylon-6 matrix, forming composite's hybrid structure. An approach based on progressive improve...

Photolithography combined with surface nucleated protein self-assembly of azido-modified spider silk proteins is used to create an arbitrarily shaped, inherently cell repellent micropattern based on nanofibrillar networks. Using “click” chemistry dibenzocyclooctin modified oligonucleotides, the microstructures are functionalized DNA-aptamers, which selectively bind cancer markers tyrosine kinas...

PURPOSE The purpose of this study was to evaluate the efficacy of two different metal conditioners for non-precious metal alloys for the bonding of porcelain to a cobalt-chromium (Co-Cr) alloy. MATERIALS AND METHODS Disk-shaped specimens (2.5×10.0 mm) were cast with Co-Cr alloy and used as adherend materials. The bonding surfaces were polished with a 600-grid silicon carbide paper and airborn...

This paper investigates the roles of external loads and specimen geometry on crack path selection in adhesively bonded joints. First, the effect of mixed mode fracture on crack path selection is studied. Using epoxy as an adhesive and aluminum as the adherends, double cantilever beam (DCB) specimens with various T-stress levels are prepared and tested under mixed mode fracture loading. Post-fai...