Article
Polymer Science
Klaudia Sliwa-Wieczorek, Boguslaw Zajac
Summary: The study investigated the double lap adhesive connections using Sika(R) PS and Monolith EP2579-1 in shear tests, showing that temperature affects the load capacity and deformability of the joint. A comparative analysis between polyurethane and epoxy adhesives was conducted, with observations on the failure initiation and form. The results indicated that temperature increase reduced the destructive force for both adhesives, with flexible joints retaining partial load capacity after reaching destructive force.
Article
Chemistry, Multidisciplinary
Xoan F. Sanchez-Romate, Antonio Del Bosque, Anabel Crespo, Rafael Alonso, Maria Sanchez, Alejandro Urena
Summary: This study proposes an adhesive based on Fe3O4 nanoparticle-doped epoxy resin for detachable adhesive joints with GFRP substrates. The results show that increasing the MNP content promotes larger aggregates and reduces nanoparticle sedimentation. The addition of expandable microspheres allows for a more uniform dispersion of MNPs and enhances the adhesive's electromagnetic heating capability. Furthermore, the lap shear strength of the adhesive is significantly reduced under EM heating, facilitating successful detachme
Article
Chemistry, Multidisciplinary
Haisu Kang, Ji Hee Lee, Youngson Choe, Seung Geol Lee
Summary: In this study, an artificial neural network was used to predict the adhesion strength of structural epoxy adhesives, and it was found that the content of catalyst, flexibilizer, and curing agent in the epoxy formulation had the highest correlation with the lap shear strength. By analyzing the data sets, predictive models were constructed and optimized to predict and optimize the adhesive strength of epoxy adhesives.
Article
Materials Science, Multidisciplinary
Yecheng Wang, Guodong Nian, Xuxu Yang, Zhigang Suo
Summary: This paper investigates the elastic properties of adhesives and adherends in lap shear, examining the impact of the shear lag length on the energy release rate. The study reveals the significance of the ratio of remaining joint length to shear lag length in determining the deformations and energy release rates in short and long-joint limits. The shear lag model provides a reliable estimate of energy release rates for different values of the length ratio.
MECHANICS OF MATERIALS
(2021)
Article
Engineering, Chemical
Sunil Kumar Gupta, Dharmendra Kumar Shukla, Dhake Kaustubh Ravindra
Summary: The lap shear strength and fracture toughness of epoxy/alumina nanocomposite adhesives in bonded aluminum alloy joints were significantly improved compared to neat epoxy adhesive. The optimal performance was observed at 1.5 wt.% of nanospheres and 1.0 wt.% of nanorods in the adhesive composition.
JOURNAL OF ADHESION
(2021)
Article
Chemistry, Multidisciplinary
Mario Santos, Jaime Santos
Summary: This study evaluates adhesive single-lap joints using ultrasound guided waves by simulation and experimental approaches. The signal propagation characteristics in the presence of defects in the adhesive joint are investigated. It is found that the amplitude of guided wave modes can be estimated from the properties of the incoming wave in the non-bonded region, with the excitation of these modes linked to the similarity of their shapes.
APPLIED SCIENCES-BASEL
(2023)
Article
Engineering, Chemical
S. Kurennov, K. Barakhov, O. Vambol
Summary: The aim of this article is to solve the problem of topological optimization of a symmetric doubleshear and bi-adhesive joint. A one-dimensional mathematical model is proposed to represent the stress state of the joint. The model is used to optimize the shape of the outer substrate and obtain the optimal lengths of the adhesive joint sections with rigid and compliant adhesives.
INTERNATIONAL JOURNAL OF ADHESION AND ADHESIVES
(2023)
Article
Engineering, Chemical
Ramin Chitsaz Dehaghani, Duane Cronin, John Montesano
Summary: This study focused on the lap shear strength of adhesively bonded non-crimp fabric CFRP composite materials, finding that abrading the surface with sandpaper resulted in the highest lap shear strength. Different stacking sequences also had an impact on the lap shear strength of the joints. Distinct failure processes were observed for CFRP adherends with different stacking sequences, but the final failure event was the fracture of the thin matrix layer in the 0 degrees ply of the adherends.
INTERNATIONAL JOURNAL OF ADHESION AND ADHESIVES
(2021)
Article
Engineering, Chemical
Alireza Dadian, Saeed Rahnama
Summary: The study focused on enhancing the ultimate loading capacity of lap shear joints through the use of optimum functionally graded joints, resulting in a more uniform stress distribution and improved load-bearing contribution. By optimizing adhesive properties and grading the overlap symmetrically, the shear load strength of the specimen was significantly increased by 299% compared to the base specimen.
INTERNATIONAL JOURNAL OF ADHESION AND ADHESIVES
(2021)
Article
Polymer Science
Wanru Wang, Zhen Wang, Rui Guo, Guijun Xian
Summary: A new steel surface treatment method using suspensions of nano-sized and micro-sized Al2O3 particles was developed and proved to effectively enhance the bonding strength of steel-epoxy adhesives.
Editorial Material
Multidisciplinary Sciences
Kevin Kendall
Summary: This passage highlights the oversight of ASTM standards in neglecting the Griffith energy criterion of cracking in glued and welded joints, proposing a reevaluation of performance definitions for welded composite lap joints.
PHILOSOPHICAL TRANSACTIONS OF THE ROYAL SOCIETY A-MATHEMATICAL PHYSICAL AND ENGINEERING SCIENCES
(2021)
Article
Engineering, Mechanical
Karolina Olszowska, Marcin Godzierz, Slawomira Pusz, Jerzy Myalski, Anastasiia Kobyliukh, Georgi Georgiev, Andrzej Posmyk, Boyko Tsyntsarski, Urszula Szeluga
Summary: The study investigated the influence of graphene nanoplatelets (GNPs) and carbon foam (CF) micrograins on the morphology and thermomechanical and tribological properties of epoxy composites. Binary composites containing either CF grains or GNPs and multiphase composites with CF particles and GNPs together were prepared using two different procedures. CF, when combined with GNPs, significantly improved the storage modulus, hardness, thermal stability, and reduced the friction coefficient and wear rate compared to the epoxy matrix. Among the two methods, the composite fabricated by the first method demonstrated superior tribological properties, especially under higher wear loads.
TRIBOLOGY INTERNATIONAL
(2023)
Article
Engineering, Chemical
Jingfu Song, Guoqing Wang, Gai Zhao
Summary: This study experimentally and using molecular dynamics (MD) simulations evaluated the tensile and shear performances of epoxy adhesive and shed light on its shear mechanism at an atomic level. By establishing a sandwich structure and observing the behavior between the adhesive and copper surfaces, the study found adhesive failure involving interfacial slippage and slight shear deformation on smooth surfaces, while strong bonding and fracture under shear stress occurred on rough surfaces. MD simulations provided consistent data with experimental values.
POLYMER ENGINEERING AND SCIENCE
(2023)
Article
Chemistry, Multidisciplinary
Gozde Esenoglu, Metin Tanoglu, Murat Barisik, Hande Iplikci, Melisa Yeke, Kaan Nuhoglu, Ceren Turkdogan, Sekin Martin, Engin Aktas, Serkan Dehneliler, Ahmet Ayberk Gurbuz, Mehmet Erdem Iris
Summary: In this study, PA66 nanofibers produced by electrospinning were coated on carbon/epoxy prepregs to enhance the bond strength of the composites. The results showed that the coating substantially improved the shear strength, impact strength, and fracture toughness of the joints.
Article
Engineering, Civil
Nawres J. Al-Ramahi, Roberts Joffe, Janis Varna
Summary: A numerical study on double-lap adhesive joints under tensile and thermal loads was conducted, with a focus on different parameters affecting peel and shear stress distribution in the adhesive layer. Results showed that increasing the axial modulus of the adherends reduced stress concentration at overlap ends, while changing the fiber orientation in plies connected to the adhesive layer improved stress distribution.
ENGINEERING STRUCTURES
(2021)
Review
Materials Science, Ceramics
M. S. Goyat, Amrita Hooda, Tejendra K. Gupta, Kaushal Kumar, Sudipta Halder, P. K. Ghosh, Brijnandan S. Dehiya
Summary: The use of epoxy resins has gained significant attention worldwide, especially in sectors like automotive, construction, and aerospace industries. This article reviews the research on epoxy composites filled with non-functionalized oxide nanoparticles, highlighting their potential for improving mechanical properties.
CERAMICS INTERNATIONAL
(2021)
Article
Materials Science, Composites
Kaushal Kumar, Manjeet S. Goyat, Ankur Solanki, Arun Kumar, Ravi Kant, Prakriti K. Ghosh
Summary: This work demonstrates the improved mechanical performance and unique toughening mechanisms of ultrasonic dual mixing (UDM) processed epoxy-SiO2 nanocomposites. The optimal loading of SiO2 nanoparticles in the epoxy matrix was found to be 3 vol% for enhanced performance of the nanocomposite.
POLYMER COMPOSITES
(2021)
Article
Materials Science, Multidisciplinary
Nidhi, Sunita Dahiya, Atul Kumar, Surender Duhan, M. S. Goyat
Summary: A single-pot hydrothermal synthesis route was used to produce TiO2/SBA-16 cubic mesoporous nanocomposite, and its relative humidity response was investigated. Analytical techniques confirmed the structural and compositional properties of the nanocomposite, and its potential as an advanced humidity sensor was demonstrated.
JOURNAL OF MATERIALS SCIENCE
(2022)
Article
Materials Science, Multidisciplinary
Subhankar Das, Sudipta Halder, Bappi Paul, Nazrul Islam Khan, M. S. Goyat
Summary: Graphene oxide (GO) or reduced graphene oxides (RGO) have shown great potential as reinforcements in epoxy composites for enhancing their mechanical and thermal properties. However, the preparation of GO and RGO is challenging. This study proposes the use of milled graphite nanoparticles (GrNPs) as an alternative reinforcement due to their porous structure and ease of oxidation. The use of economical silanized milled GrNPs significantly improves the thermo-mechanical behavior of the epoxy nanocomposites without sacrificing other important properties.
MATERIALS CHEMISTRY AND PHYSICS
(2022)
Article
Materials Science, Composites
Pannalal Choudhury, Sudipta Halder, Subhankar Das
Summary: By optimizing the process parameters and utilizing the ultrasonic dual-mode mixing process, we have successfully achieved uniform dispersion and exfoliation of graphene nanoplatelets in epoxy resin, leading to the fabrication of hybrid GFRP laminates with excellent mechanical properties.
JOURNAL OF COMPOSITE MATERIALS
(2022)
Review
Materials Science, Multidisciplinary
Avani Kumar Upadhyay, M. S. Goyat, Ajay Kumar
Summary: This review article analyzes and summarizes the effects of oxide nanoparticles, carbon nanotubes, and their hybrid form on the mechanical properties and toughening mechanisms of epoxy nanocomposite. The challenges and possible solutions for the fabrication of hybrid epoxy nanocomposites are also discussed.
JOURNAL OF MATERIALS SCIENCE
(2022)
Article
Materials Science, Multidisciplinary
Konica Sharma, M. K. Malik, Amrita Hooda, Kailash Pandey, Jaishree Sharma, M. S. Goyat
Summary: In this study, a corrosion-resistant superhydrophobic coating based on SiO2 nanoparticles was developed for mild steel. Micro-patterned mild steel was fabricated using a wire electrical discharge machine (EDM) and then chemically etched with Piranha solution. The etched metal was coated with triethoxyoctylsilane-modified SiO2 nanoparticles to create a hierarchical micro-nano roughness with low surface energy. The coated mild steel exhibited micro-nano hierarchical roughness, as confirmed by atomic force microscope (AFM) and field-emission scanning electron microscope (FESEM) analysis. The coating showed a maximum water contact angle (CA) of 153 +/- 2 degrees and a sliding angle (SA) of 5 +/- 2 degrees. Electrochemical impedance spectroscopy (EIS) plots demonstrated the excellent corrosion resistance of the coated metal. Therefore, the modified SiO2 nanoparticles-based superhydrophobic coating could be a promising option for preventing the corrosion of mild steel.
JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE
(2023)
Article
Materials Science, Multidisciplinary
M. S. Goyat, Saksham Sharma, Subhankar Das, B. S. Tewari, Mukesh Kumar, Tejendra K. Gupta, Charu Pant
Summary: High-performance epoxy-SBA-15 nanocomposites were prepared using the ultrasonic dual-mode mixing technique. The addition of 0.5 wt% of SBA-15 improved the storage modulus and marginally affected the glass transition temperature of the epoxy nanocomposites. However, it significantly increased the failure strength and strain without impacting its modulus. The addition of a higher wt% of SBA-15 did not improve the mechanical properties. The uniform dispersion of SBA-15 through ultrasonic dual-mode mixing converted the hydrophilic epoxy into a highly hydrophobic one, showcasing the potential to create cost-effective epoxy nanocomposites with improved thermo-mechanical and wetting properties.
JOURNAL OF MATERIALS SCIENCE
(2022)
Article
Materials Science, Multidisciplinary
Sudipta Halder, Jialai Wang, Yi Fang, Xin Qian, Muhammad Ali Imam
Summary: This study develops a novel PCM microcapsule using cenosphere as the protective shell and a bio-inspired dopamine coating. Experimental results show that adding this new PCM microcapsule significantly improves the compressive strength of cement mortar, achieving a 35% increase.
MATERIALS CHEMISTRY AND PHYSICS
(2022)
Article
Materials Science, Ceramics
Konica Sharma, M. K. Malik, Amit Chawla, Subhankar Das, Dharamvir Singh Ahlawat, M. S. Goyat
Summary: SiO2 nanoparticles were modified and coated on brass to create a corrosion-resistant superhydrophobic coating. The coated brass showed the presence of SiO2 nanoparticles and exhibited superhydrophobicity. The corrosion resistance of the coated brass was demonstrated by its high impedance value and lower corrosion current density compared to uncoated brass.
JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY
(2023)
Article
Materials Science, Composites
Lakshi Nandan Borah, Sudipta Halder, Pannalal Choudhury
Summary: This study aims to enhance the fracture properties of epoxy-based composites by adding cost-effective ball-milled graphitic nanoparticles. The ball-milled graphite nanoparticles achieved a significant reduction in particle size after 15 hours of dry milling and a similar reduction was achieved after 3 hours of wet milling. Incorporating these nanoparticles into the epoxy network resulted in a significant improvement in fracture toughness and energy.
POLYMER COMPOSITES
(2023)
Article
Chemistry, Physical
Nazrul Islam Khan, Sudipta Halder, M. S. Goyat, Lakshi Nandan Borah, Subhankar Das
Summary: The concept of using bio-inspired healing mechanisms in FRP-based laminated composites is a trending area of research for lightweight high-performance materials. In this study, we developed Diels-Alder (DA) grafted graphene nanoplatelets (GNPs) and introduced them into CFRP composites to achieve self-healing. The DA-grafted GNPs provided dual benefits of repetitive self-healing and improved mechanical performance of the modified CFRP.
Article
Materials Science, Multidisciplinary
Bhavna Rohilla, Aryan Boora, M. S. Goyat, Surender Duhan
Summary: This research introduces a novel approach to humidity sensing using 2D hexagonal mesoporous COK-12, which shows potential for advancing humidity-sensing technology and making significant progress in the field of surface chemistry and catalysis. The study demonstrates that tungsten-doped COK-12 humidity sensors exhibit high sensitivity and response speed, and show a linear correlation between relative humidity and electrical resistance.
MATERIALS ADVANCES
(2023)
Article
Materials Science, Composites
Nazrul Islam Khan, Sudipta Halder, Subhankar Das, Manjeet S. Goyat
Summary: This study successfully improved the mechanical performance of nanocomposites and hybrid CFRP composites by functionalizing graphitic nanoparticles and incorporating either epoxy or silanization agents.
POLYMER COMPOSITES
(2021)
