International Journal of Adhesion and Adhesives最新文献

{"title":"Mechanical behaviour and durability of an epoxy adhesive for structural glass-to-steel connections in a ship","authors":"Danie Wium ,&nbsp;Bert Van Lancker ,&nbsp;Jan Belis ,&nbsp;Evert Lataire","doi":"10.1016/j.ijadhadh.2025.104050","DOIUrl":"10.1016/j.ijadhadh.2025.104050","url":null,"abstract":"<div><div>The luxury yacht industry demands increased vessel transparency by enlarging glazed areas. Structurally integrating glass into yacht structures offers a solution to this. However, this requires a rigid and reliable connection between glass and metal components, which needs to be validated. Consequently, an epoxy adhesive is tested experimentally to evaluate its structural performance for such applications. First, tensile tests on dumbbell specimens are conducted at crosshead speeds of 0.1, 1, 10 and 50 mm/min and temperatures of −20, 23, 50 and 80 °C. Results show that both stiffness and strength increase with strain rate but decrease with increasing temperature, with significant loss at 80 °C. Second, shear tests on double-lap glass-to-steel specimens evaluate adhesion, using a bond thickness of 7 mm to accommodate geometric tolerances in a ship. This thickness is significantly larger than what is recommended by the manufacturer for maximum bond strength. Third, ageing tests are performed on dumbbell and double-lap specimens stored at 50 °C ± 1 °C and 94 ± 1 % relative humidity for six weeks. After ageing, tensile strength and stiffness of the epoxy reduced by 24 % and 51 %, respectively. While double-lap specimens exhibited reduced stiffness after ageing, the scatter on results could not be used to quantify stiffness and strength reduction. During the ageing period the amount of water absorbed by dumbbell specimens was estimated by weighing the specimens periodically. A correlation was found between amount of absorbed water and degraded properties. Based on its high strength and stiffness, epoxy has potential for structural glass-to-steel bonding. However, its viscoelastic behaviour makes it susceptible to temperature and load rate variations.</div></div>","PeriodicalId":13732,"journal":{"name":"International Journal of Adhesion and Adhesives","volume":"141 ","pages":"Article 104050"},"PeriodicalIF":3.2,"publicationDate":"2025-05-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143943189","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Effect of laser patterned microscale interlocking features on aluminum adhesive-bonded single lap joints","authors":"F. Musiari,&nbsp;F. Moroni,&nbsp;A. Lutey","doi":"10.1016/j.ijadhadh.2025.104047","DOIUrl":"10.1016/j.ijadhadh.2025.104047","url":null,"abstract":"<div><div>Many attempts have been made to enhance the strength or toughness of adhesive-bonded joints by fabricating macroscopic interlocking features on adherends or resorting to 3D-printing to produce microscale surface structures. Laser ablation has recently been proposed as a method to manufacture serrated surface profiles on aluminum single lap joints with the aim of improving strength; however, increases have so far been limited due to joint failure resulting from peeling phenomena at the end of the overlap, making enhancements in mechanical interlocking ineffective in the loading direction. The present work seeks to overcome these limitations, increasing the role of interlocking in strengthening laser patterned joints by employing deeper tooth-like features to increase geometric interlocking and thicker substrates to minimize the effect of bending-induced peeling on the initiation and development of failure. Several different patterns have been produced and tested, including both symmetrical (identical adherends) and asymmetrical (complementary adherends) with different feature orientations with respect to the loading direction. The results have revealed that, on single lap joints with thicker adherends, by using deeper asymmetrical features, the strength can be increased by 40 % compared to that obtained with flat adherends.</div></div>","PeriodicalId":13732,"journal":{"name":"International Journal of Adhesion and Adhesives","volume":"141 ","pages":"Article 104047"},"PeriodicalIF":3.2,"publicationDate":"2025-05-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143943188","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Fatigue crack growth analysis of a ductile structural acrylic adhesive under constant-amplitude load control at various loading conditions","authors":"Yu Sekiguchi ,&nbsp;Kazumasa Shimamoto ,&nbsp;Keiji Houjou ,&nbsp;Chiaki Sato","doi":"10.1016/j.ijadhadh.2025.104049","DOIUrl":"10.1016/j.ijadhadh.2025.104049","url":null,"abstract":"<div><div>The fatigue behavior of adhesives depends on the type of adhesive and loading conditions. Highly ductile adhesives, such as structural acrylic adhesives, are excellent under static conditions; however, their fatigue crack growth (FCG) is not yet well understood. Especially when ductile adhesives are used to bond large structures, the joints are subjected to cyclic creep, a combination of fatigue and creep. Therefore, it is important to understand the contribution of creep to FCG clearly.</div><div>The fatigue double cantilever beam tests of a structural acrylic adhesive were conducted by varying mean loads to investigate the effect of creep on FCG. Calculating the equivalent crack length from compliance, the FCG was found to be divided into three stages, similar to the creep curve. The relationships between FCG rate and energy release rate (ERR) and between ERR and the number of cycles until the FCG onset, i.e., the FCG relationship and G−N curve, were investigated using several ERR parameters. A parameter <span><math><mrow><msubsup><mi>G</mi><mrow><mo>Δ</mo><mi>P</mi></mrow><mrow><mn>1</mn><mo>−</mo><mi>γ</mi></mrow></msubsup><mo>·</mo><msubsup><mi>G</mi><mtext>mean</mtext><mi>γ</mi></msubsup></mrow></math></span>, which is a combination of ERRs represented by <span><math><mrow><mo>Δ</mo><mi>P</mi><mo>=</mo><msub><mi>P</mi><mi>max</mi></msub><mo>−</mo><msub><mi>P</mi><mi>min</mi></msub></mrow></math></span> and <span><math><mrow><msub><mi>P</mi><mtext>mean</mtext></msub><mo>=</mo><mrow><mrow><mo>(</mo><mrow><msub><mi>P</mi><mi>max</mi></msub><mo>+</mo><msub><mi>P</mi><mi>min</mi></msub></mrow><mo>)</mo></mrow><mo>/</mo><mn>2</mn></mrow></mrow></math></span>, was found to be the most suitable crack driving force, and was therefore used to discuss fatigue and creep contributions. For the adhesive tested, the creep contribution was slightly greater in the load control than in the displacement control. Furthermore, the effect of R ratio on the FCG relationships of <span><math><mrow><msub><mi>G</mi><mi>max</mi></msub></mrow></math></span> and <span><math><mrow><mo>Δ</mo><mi>G</mi></mrow></math></span> was discussed in relation to the fatigue and creep contributions.</div></div>","PeriodicalId":13732,"journal":{"name":"International Journal of Adhesion and Adhesives","volume":"140 ","pages":"Article 104049"},"PeriodicalIF":3.2,"publicationDate":"2025-05-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143905873","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Additive manufacturing of surface structured metal parts for high strength lightweight injection overmolded polymer-metal hybrid joints","authors":"G.H.M. Oliveira ,&nbsp;V.F. Sciuti ,&nbsp;R.B. Canto ,&nbsp;S. Arneitz ,&nbsp;L. Minkowitz ,&nbsp;S.T. Amancio-Filho ,&nbsp;L.B. Canto","doi":"10.1016/j.ijadhadh.2025.104045","DOIUrl":"10.1016/j.ijadhadh.2025.104045","url":null,"abstract":"<div><div>Polymer-metal hybrid structures (PMH) are increasingly used in the automotive and aerospace industries for lightweight applications. In this study, we investigate the integration of emerging additive manufacturing with injection overmolding to produce high-strength lightweight hybrid joints. AlSi10Mg substrates, with and without submillimeter-sized mushroom-shaped surface structures, were additively manufactured using laser powder bed fusion (L-PBF), followed by injection overmolding (IOM) with polycarbonate (PC). Overlap joints with structured metal substrates demonstrated remarkable joining strength (20.5 ± 3.8 MPa), primarily attributed to the micro-mechanical interlocking between the consolidated polymer and the metal surface structure. Fracture analysis revealed two primary modes of cohesive failure (stretching and shear) in the mushroom-shaped structures, contingent on their location on the metal surface. This behavior was attributed to a combination of interfacial shear stress and secondary bending, as elucidated by digital image correlation (DIC) analysis. The fatigue life of hybrid joints was determined to be 38 % of the joining strength at 10⁶ cycles, indicating excellent mechanical performance and high potential for engineering applications.</div></div>","PeriodicalId":13732,"journal":{"name":"International Journal of Adhesion and Adhesives","volume":"141 ","pages":"Article 104045"},"PeriodicalIF":3.2,"publicationDate":"2025-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144071562","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Nano-reinforced adhesives: Effects of graphene, silica, and cellulose on mechanical properties of laminated wood materials","authors":"Huseyin Pelit ,&nbsp;Mustafa Korkmaz ,&nbsp;Esra Davaz","doi":"10.1016/j.ijadhadh.2025.104044","DOIUrl":"10.1016/j.ijadhadh.2025.104044","url":null,"abstract":"<div><div>This study investigated the effects of graphene, silica, and cellulose nanoparticles on the mechanical properties of laminated wood specimens using polyvinyl acetate (PVAc), urea-formaldehyde (UF), and epoxy (EPX) adhesives. Poplar (<em>Populus nigra</em>) and beech (<em>Fagus sylvatica</em>) veneers (4 mm thick) were bonded using adhesives enhanced with varying concentrations of nanoparticles: graphene (0.25 % and 0.50 %), silica (1 % and 2 %), and cellulose (1 % and 2 %). The laminated wood specimens were tested for modulus of elasticity (MOE), modulus of rupture (MOR), compressive strength (CS) and bonding strength (BS). The results showed that the EPX yielded the highest mechanical strength, followed by UF, while PVAc exhibited the lowest. The addition of all nanoparticles improved performance compared to the base adhesives. Graphene additions significantly improved MOE, MOR, and CS, while cellulose and silica primarily enhanced BS strength. Generally, increasing nanoparticle concentration enhanced mechanical properties, with the exception of BS, which decreased with higher silica concentration. These results demonstrate the potential for tailoring laminated wood properties by selecting specific nanoparticle types and concentrations, offering opportunities for optimized and potentially more sustainable material utilization across diverse applications, from furniture to structural components.</div></div>","PeriodicalId":13732,"journal":{"name":"International Journal of Adhesion and Adhesives","volume":"140 ","pages":"Article 104044"},"PeriodicalIF":3.2,"publicationDate":"2025-04-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143902106","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Experimental fatigue characterization and modeling of a bi-component structural acrylic adhesive: Application to single-lap joints","authors":"Sidonie Pinaroli ,&nbsp;Katell Derrien ,&nbsp;Anthony Reullier ,&nbsp;Léo Morin ,&nbsp;Véronique Favier","doi":"10.1016/j.ijadhadh.2025.104026","DOIUrl":"10.1016/j.ijadhadh.2025.104026","url":null,"abstract":"<div><div>The aim of this paper is to predict the fatigue behavior of bonded joints made of a bi-component structural acrylic adhesive. The approach considered is based on a characterization of the fatigue properties of the bulk adhesive combined with a finite element modeling of the bonded joint to provide the heterogeneous stress field within the adhesive. The identification of the fatigue model is conducted with experimental bulk adhesive tests under two loadings (tensile–compression and tensile–tensile) in order to account for the effect of the mean stress. A modified Crossland criterion, in the limited life time domain, is used to predict the fatigue life of the bonded joint assembly. The numerical fatigue life determined with this approach is compared to the experimental fatigue life of the assembly. A good correlation is found between the numerical model and the experimental results.</div></div>","PeriodicalId":13732,"journal":{"name":"International Journal of Adhesion and Adhesives","volume":"140 ","pages":"Article 104026"},"PeriodicalIF":3.2,"publicationDate":"2025-04-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143890591","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Certification of adhesively bonded structures: Review and outlook","authors":"Panayiotis Tsokanas ,&nbsp;Fabio Santandrea ,&nbsp;Guilherme G. Momm ,&nbsp;Vlatka Rajčić ,&nbsp;Davor Skejić ,&nbsp;Dragan Rajnovic ,&nbsp;Lucas F.M. da Silva ,&nbsp;Vassilis Kostopoulos","doi":"10.1016/j.ijadhadh.2025.104041","DOIUrl":"10.1016/j.ijadhadh.2025.104041","url":null,"abstract":"<div><div>There is increasing interest in achieving unprecedented levels of eco-efficiency. Consequently, many industries, including the aircraft, construction, automotive, naval, offshore, and wind energy sectors, aim to lighten structures by combining or replacing metals with composites. Adhesive bonding is the most promising joining technology regarding weight and performance, but its application remains largely limited to secondary, non-safety-critical structures in many industries. The main reasons for this limited acceptance of adhesive bonding are our restricted knowledge of the associated key manufacturing parameters, non-destructive inspection techniques, damage tolerance methodologies, and tools for diagnosis and prognosis of structural integrity. Certification of a product, service, or system is the provision, by an independent body, of a written assurance that the product, service, or system under consideration meets specific requirements. The present paper reviews for the first time, the relatively unexplored topic of the certification of adhesively bonded structures in the four broader industrial sectors: civil aviation, construction, maritime, and automotive. After highlighting the goals of this study, we discuss several elements involved in the certification process: material compatibility, bonding process, component design, manufacturing, physical tests, and simulation. This work is intended to serve as a roadmap for developing certification schemes for primary adhesively bonded structures to increase the acceptance level of adhesive bonding in various industries.</div></div>","PeriodicalId":13732,"journal":{"name":"International Journal of Adhesion and Adhesives","volume":"141 ","pages":"Article 104041"},"PeriodicalIF":3.2,"publicationDate":"2025-04-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144189794","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Performance of bond between carbon fiber-reinforced polymer sheets and thermally shocked damaged foam concrete","authors":"Yasmeen Taleb Obaidat,&nbsp;Yasmeen Fawwaz Hijazi","doi":"10.1016/j.ijadhadh.2025.104042","DOIUrl":"10.1016/j.ijadhadh.2025.104042","url":null,"abstract":"<div><div>This research investigates the bond performance between Foam Concrete (FC) specimens damaged by thermal shock with Carbon Fiber Reinforced Polymer (CFRP) sheets. Additionally, the study provides novel insights into anchorage strategies for thermally damaged foam concrete, focusing on how concrete type and CFRP sheet dimensions influence bond strength. Two concrete mixes were used to cast 32 specimens with dimensions of (150 mm × 150 mm x 200 mm). Experimental results showed that the NWAC specimens outperformed the FC specimens by an average of 79.74 %, 89.91 %, 35.23 %, and 255.82 %, respectively, in terms of bond load, slippage, stiffness, and toughness. The bonded area of the CFRP sheet affected the bond behavior between the concrete and the sheet. Specimens with 15 cm CFRP sheet width showed increases of 38.90 %, 22.50 %, 31.39 %, and 70.88 %, in bond loads, slippage, stiffness, and toughness than the specimens with 10 cm CFRP sheet widths. Additionally, the specimens with a 20 cm CFRP sheet length outperformed those with a 14 cm CFRP sheet length by an average of 27.46 %, 56.44 %, 17.90 %, and 100.80 %, respectively, in these properties. Most of the tested specimens failed due to concrete separation or peeled-off concrete interfaces with different thicknesses of the concrete layer.</div></div>","PeriodicalId":13732,"journal":{"name":"International Journal of Adhesion and Adhesives","volume":"140 ","pages":"Article 104042"},"PeriodicalIF":3.2,"publicationDate":"2025-04-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143890595","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Mechanical and fracture behaviour of epoxy polymer under extreme low temperature and high strain rate conditions","authors":"Palak Bhagoria,&nbsp;Muddu Rahul Bharadwaj,&nbsp;Rohit Kumar,&nbsp;Kuldeep Yadav,&nbsp;Vikrant Tiwari","doi":"10.1016/j.ijadhadh.2025.104039","DOIUrl":"10.1016/j.ijadhadh.2025.104039","url":null,"abstract":"<div><div>Low-temperature studies are crucial in material science, cryogenic, and aerospace engineering, where materials endure extreme temperatures. High strain rate loading at low temperatures significantly affects material performance and integrity. This article investigates the dynamic mechanical response of EPOFINE®-1564, a Bisphenol-A-based liquid epoxy resin, using Split Hopkinson Pressure Bar (SHPB) and Modified Hopkinson Pressure Bar (MHPB) at high strain rates. An in-house built liquid nitrogen environment chamber was used to attain low temperatures. Dynamic experiments under compressive loading were conducted at strain rates of 710–2051 s⁻¹ and temperatures between −120 °C and −25 °C, while under tensile loading, the experiments were performed at strain rates of 1125–2194 s⁻¹ and temperatures between −70 °C and −40 °C. The results revealed an increase of strength and stiffness by 12.3 % and 16.66 %, respectively, for compressive loading with a decrease in temperature from −25 °C to −120 °C. Similarly, these properties increased by 9.28 % and 2.6 % for tensile loading with the decrease in temperature from −40 °C to −70 °C. Additionally, MHPB was employed to investigate the fracture behaviour of the epoxy resin under dynamic loading (6 m/s – 12 m/s) using Three-Point Bend (TPB) specimens. High-speed imaging and 3D Digital Image Correlation (DIC) revealed that dynamic fracture toughness decreased with temperature, weakening intermolecular interactions, and reducing crack resistance. Analyzing the fracture surface using scanning electron microscopy revealed the disappearance of stretch zones and crazes as brittleness increased with decreasing temperature.</div></div>","PeriodicalId":13732,"journal":{"name":"International Journal of Adhesion and Adhesives","volume":"140 ","pages":"Article 104039"},"PeriodicalIF":3.2,"publicationDate":"2025-04-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143886485","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Fatigue fracture mechanisms and strength improvement of epoxy adhesive joints with surface Treatment: An integrated experimental and molecular dynamics study","authors":"Masayoshi Ogawa ,&nbsp;Akihiro Shinozaki ,&nbsp;Yuichi Hosoya ,&nbsp;Jiayue Hu ,&nbsp;Akio Yonezu ,&nbsp;Ling Liu","doi":"10.1016/j.ijadhadh.2025.104040","DOIUrl":"10.1016/j.ijadhadh.2025.104040","url":null,"abstract":"<div><div>In recent years, enhancing the long-term reliability of adhesive bonding has become crucial for the innovative design of multi-material structures aimed at reducing the structural weight of transportation systems. As a result, it is essential to elucidate the mechanisms behind fatigue fracture and propose methods to improve the fatigue strength of adhesive joints. Surface modification of the adherend in adhesive joints has shown great promise in significantly increasing fatigue strength by promoting stable fracture, specifically cohesive fracture. This study experimentally demonstrates an increase in the fatigue strength of adhesive joints through the application of silane coupling agent (SCA) treatment, resulting from enhanced chemical bonding at the adhesive interface. Molecular dynamics (MD) simulations were employed to model the various cross-linking reactions occurring at the resin/SCA/alumina interface, revealing how SCA modifies the interface at the atomistic level. The MD simulation further elucidates the fatigue fracture mechanisms of adhesive joints within the epoxy resin during cyclic loading, with a particular focus on the void-induced cracking as well as void growth and coalescence under the high- and low-stress fatigue conditions, respectively.</div></div>","PeriodicalId":13732,"journal":{"name":"International Journal of Adhesion and Adhesives","volume":"140 ","pages":"Article 104040"},"PeriodicalIF":3.2,"publicationDate":"2025-04-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143917518","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}