Characterization of Densified Pine Wood and a Zero-Thickness Bio-Based Adhesive for Eco-Friendly Structural Applications DOI Open Access
Shahin Jalali, Catarina S. P. Borges, Ricardo J. C. Carbas

et al.

Materials, Journal Year: 2023, Volume and Issue: 16(22), P. 7147 - 7147

Published: Nov. 13, 2023

This study investigates a sustainable alternative for composites and adhesives in high-performance industries like civil automotive. pioneers the development application of new methodology to characterize bio-based, zero-thickness adhesive. method facilitates precise measurements adhesive’s strength fracture properties under conditions. The research also encompasses characterization densified pine wood, an innovative wood product distinguished by enhanced mechanical properties, which is subsequently compared natural wood. We conducted comprehensive wood’s utilizing dogbone-shaped samples fiber direction, block specimens transverse direction. Butt joints were employed adhesive testing. Mode I determined via compact tension (CT) double cantilever beam (DCB) tests adhesive, respectively, while mode II response was assessed through end-loaded split (ELS) tests. densification procedure, encompassing chemical processes, focal point study. Initially, subjected acid boiling remove matrix, followed pressure enhance density. As result, density increased approximately 100 percent, accompanied substantial improvements energy along direction about 120 percent. However, it worth noting that due delignification nature method, mainly reliant on lignin exhibited compromises. Also introduced technique evaluate bio-based applied as layer. results from this reveal promising highlighting potential eco-friendly substitute synthetic industry.

Language: Английский

Enhancing Fatigue Life and Strength of Adhesively Bonded Composite Joints: A Comprehensive Review DOI Open Access

Hossein Malekinejad,

Ricardo J. C. Carbas, A. Akhavan‐Safar

et al.

Materials, Journal Year: 2023, Volume and Issue: 16(19), P. 6468 - 6468

Published: Sept. 28, 2023

Adhesive bonding is widely seen as the most optimal method for joining composite materials, bringing significant benefits over mechanical joining, such lower weight and reduced stress concentrations. Adhesively bonded joints find extensive applications where cyclic fatigue loading takes place, but this might ultimately lead to crack damage safety issues. Consequently, it has become essential study how these structures behave under loads identify remaining gaps in knowledge give insights into new possibilities. The life of adhesively influenced by various parameters, including joint configuration material properties adherends adhesive. Numerous studies with varying outcomes have been documented literature. However, due multitude influential factors, deriving conclusive from practical design purposes proven be challenging. Hence, review aims address challenge discussing different methods enhance performance joints. Additionally, provides a comprehensive overview existing literature on loading, focusing three main aspects: Adherends modification, adhesive configurations. Since effect modifying adhesive, adherends, configurations not comprehensively studied literature, fill gap compiling comparing relevant experimental data. Furthermore, discusses challenges limitations associated that can used monitor initiation propagation cracks.

Language: Английский

Citations

29
Progress in adhesive-bonded composite joints: A comprehensive review DOI

N. Karthikeyan,

Jesuarockiam Naveen

Journal of Reinforced Plastics and Composites, Journal Year: 2024, Volume and Issue: unknown

Published: April 27, 2024

Among the myriad joining techniques, adhesive bonding technique is widely used to join complex large-scale composite structures because of its numerous advantages compared traditional techniques. This article profusely analysed various techniques for ameliorating performance joints, such as methods (secondary bonding, co-bonding, co-curing, and multi-material bonding), surface modification (plasma, laser treatment, grinding, etc.), additional reinforcement (Z pin, wire mesh, nanofiller, etc), different joint geometries (stepped half-stepped balanced scarf joints). Also, effect adhesives fabrication on static dynamic CFRP GFRP-based joints was studied in detail. Moreover, this review addresses finite element modelling optimisation adhesively bonded joints. It has been observed that methods, enhance roughness adherend, addition nanofillers, variations geometry greatly influence shear strength, fracture toughness, fatigue, vibration behaviour FRP

Language: Английский

Citations

17
Comparative fracture surface analysis of adhesively bonded dissimilar lap joints: Nanosilica effect DOI

Shahram A. Dizaji,

Ata Khabaz‐Aghdam, Ayşe Çağıl Kandemir

et al.

Polymer Composites, Journal Year: 2024, Volume and Issue: 45(15), P. 13676 - 13687

Published: June 26, 2024

Abstract This research presents a comparative analysis of the fracture surfaces adhesively bonded dissimilar single lap joints (DSLJs) and investigates effect nanosilica (NS) additives on their behavior performance. The study focuses DSLJs composed aluminum (Al), stainless steel (SS), copper (Cu), carbon fiber reinforced polymer (CFRP) adherends with an epoxy adhesive. surface is further analyzed by introducing two parameters: fractional total area ( T ) sensitivity each adherend Surface ). These parameters serve as benchmarks to predict final load capacity adhesive joints. It found that decrease in increase lower Young's modulus lead higher capacity. Tensile tests revealed incorporating NS up critical weight percentage 0.6 wt% improves proposed significantly contributes levels absorbing greater amounts energy failure. Furthermore, numerical simulations offer insights into stress distribution mechanism plastic deformation propagation, providing additional support for experimental findings. Highlights enhances mechanical properties DSLJs. NS–epoxy interactions characterized through Fourier transform infrared transmission electron microscopy analysis. Fracture patterns help Plastic propagation verifies pattern

Language: Английский

Citations

9
Frequency-based k-Nearest Neighbors algorithm for electromechanical impedance based detection of damage in adhesive joints DOI
A. Francisco G. Tenreiro, António M. Lopes, Lucas F. M. da Silva

et al.

Applied Soft Computing, Journal Year: 2025, Volume and Issue: 171, P. 112761 - 112761

Published: Jan. 27, 2025

Language: Английский

Citations

1
Investigating Multi-Material Additive Manufacturing for Disassembly and Reparability of Adhesive Joints by Precision Heating DOI Open Access
Mattia Frascio, Stefano Morchio, Francesco Musiari

et al.

Published: Feb. 5, 2025

Additive manufacturing enables new design solutions across various engineering fields. This work presents a method to enhance the sustainability of adhesive joints by designing that can be disassembled and repaired multiple times. The approach involves use Multi-Material Manufacturing process produce substrates with integrated circuits electrical resistance, printed using conductive filament. resistance used heat thermoplastic layer up 110 °C, allowing for reversibility in assembly enabling joint re-use repair without constraints on component’s materials thicknesses. tested after successive assembly/disassembly operations reach maximum strength during first iteration, which decreases around 50% five iterations. focus is feasibility this process, but it expected performance improved optimization. result could highly valuable component in-service healing demanufacturing remanufacturing.

Language: Английский

Citations

1
Fracture surface evaluation of adhesively bonded dissimilar joints reinforced with nanoclay DOI
Shahram A. Dizaji, Ata Khabaz‐Aghdam, Ayşe Çağıl Kandemir

et al.

Journal of Adhesion Science and Technology, Journal Year: 2025, Volume and Issue: unknown, P. 1 - 21

Published: Feb. 24, 2025

Language: Английский

Citations

1
The reduction of stress concentrations in adhesive joints with the use of curved aluminum adherends DOI
Vasco D. C. Pires,

Francisco C. C. Ribeiro,

Ricardo J. C. Carbas

et al.

Mechanics of Advanced Materials and Structures, Journal Year: 2024, Volume and Issue: 31(28), P. 10962 - 10973

Published: Jan. 12, 2024

The study proposes a novel concept of curved single lap joint (SLJ) with non- uniform adhesive thickness to reduce stress concentrations near overlap edges. Experimental and numerical methodologies investigate this using two adhesives: Araldite 2015-1 AV138. Numerical models in ABAQUS predict cohesive failure the layer. configuration doesn't significantly enhance strength SLJ ductile adhesives, but for brittle ones, increased by 131% due sensitivity peak stresses. In conclusion, effectively reduces effectiveness is linked ductility used.

Language: Английский

Citations

7
Investigation of geometric and material effects on the fatigue performance of composite and steel adhesive joints DOI Creative Commons

Filipe Sousa,

A. Akhavan‐Safar, Ricardo J. C. Carbas

et al.

Composite Structures, Journal Year: 2024, Volume and Issue: 344, P. 118313 - 118313

Published: June 26, 2024

This study experimentally investigates the combined effect of several parameters on fatigue behaviour adhesive bonded single lap joints, including: substrate material (steel, glass fibre reinforced polymer (GFRP) and carbon (CFRP)); (epoxy methacrylate); as well joint geometry (overlap length thickness). Results showed that despite lower bulk strength ductile methacrylate adhesive, in terms ratio load to ultimate failure load, joints by this had a higher performance when compared epoxy one, with differences life up 20 times for same ratio. In similar configuration, flexible GFRP substrates reduced more than 10 steel load. However, dissimilar an increase was observed which, based finite element analysis, attributed ductility its effects stress field. CFRP deterioration due occurrence interfacial failure. Regarding geometrical factors, increasing overlap led decrease nominal shear stress. Similar trend obtained thickness. A parametric analysis revealed is parameter affects joints.

Language: Английский

Citations

6
Study of the effect of bio-inspired surface texture on the shear strength of bonded 3D-printed materials: Comparison between stainless steel and polycarbonate joints DOI
Nidhal Naat, Yasmina Boutar, Salah Mezlini

et al.

International Journal of Adhesion and Adhesives, Journal Year: 2024, Volume and Issue: 131, P. 103658 - 103658

Published: Feb. 18, 2024

Language: Английский

Citations

5
Recent advances in joining technologies of aluminum alloys: a review DOI Creative Commons
Modupeola Dada, A.P.I. Popoola

Discover Materials, Journal Year: 2024, Volume and Issue: 4(1)

Published: Dec. 4, 2024

Aluminum alloys have become vital in industries such as aerospace and automotive due to their high strength-to-weight ratio, corrosion resistance, versatility. This study examines traditional joining methods like welding, brazing, mechanical fastening, alongside modern innovations friction stir welding (FSW), laser beam (LBW), hybrid arc (HLAW). These techniques enhance aluminium alloys' performance structural integrity, addressing challenges hydrogen embrittlement environmental concerns associated with hexavalent chromium. It discusses recent efforts improve fatigue fracture toughness, thermal stability, emphasizing the role of advanced meeting industry demands. The concludes by identifying future research directions alloy design, sustainable manufacturing practices, integration emerging technologies optimize aluminum for next-generation applications.

Language: Английский

Citations

5