Article
Multidisciplinary Sciences
Royson Dsouza, Paulo Antunes, Markus Kakkonen, Olli Tanhuanpaa, Pekka Laurikainen, Farzin Javanshour, Pasi Kallio, Mikko Kanerva
Summary: This study developed and analyzed a monolithic compliant structure with an integrated Fiber Bragg Grating (FBG) sensor. The stiffness of the compliant structure was estimated using mathematical and finite element (FE) models. Qualification experiments confirmed the functional performance: MB testing of synthetic (carbon and glass) and natural (flax) single filaments was successfully performed.
SCIENTIFIC REPORTS
(2021)
Article
Materials Science, Multidisciplinary
Nina Graupner, Jorg Muessig
Summary: The study found that different test methods led to varying trends in ILSS depending on the fiber mass fraction and fiber fineness. IFSS decreased with higher fiber mass fractions and diameters, while ILSS showed different trends with different test methods. The influence of fiber fineness on ILSS was not statistically proven.
FRONTIERS IN MATERIALS
(2022)
Article
Polymer Science
Yuan Dong, Jia-Cao Yang, Xiao-Jun Wang, Gang Zhang, Mei-Lin Zhang, Zhi-Mei Wei, Sheng-Ru Long, Jie Yang
Summary: This study improved a homemade apparatus for characterizing the interfacial shear strength of carbon-fiber-reinforced polyphenylene sulfide composites. The upgraded experimental device was easier to operate and showed excellent repeatability and applicability during tests. The addition of a high-frequency data-capturing tool allowed for more accurate identification of the debonding peak force and provided a higher interfacial shear strength value during testing.
Article
Engineering, Manufacturing
P. Laurikainen, R. Dsouza, M. Kakkonen, M. Kanerva, E. Sarlin
Summary: To improve the versatility of single fibre micro-composite tests, this study introduces a micro-fatigue test using a well-characterised microbond setup under cyclic loading. Two distinctive interphase types, a clean glass fibre surface and a model sizing, are controlled on the fibres' surface. The sizing significantly improves the interfacial performance and has the most prominent role in the fatigue lifetime of the microdroplet samples. Finite element analysis is used to evaluate strain-rate dependency and heating related to plastic deformation, demonstrating a well-behaving experimental setup. This method shows promise for further studies on interfacial fatigue and the role of sizing.
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
(2023)
Article
Materials Science, Composites
N. Ramasamy, V Arumugam, Suresh C. Kumar
Summary: The research focuses on improving interfacial adhesion in aramid/epoxy composites through various chemical treatments of aramid fiber surfaces. The treated fibers showed significantly higher ILSS and IFSS compared to untreated fibers, as well as higher single fiber tensile strength. This study highlights the importance of surface modification in enhancing the mechanical properties of aramid fibers in composites.
POLYMER COMPOSITES
(2022)
Article
Materials Science, Composites
Sina AhmadvashAghbash, Christian Breite, Mahoor Mehdikhani, Yentl Swolfs
Summary: Longitudinal fibre-matrix debonding is influenced by various factors such as interfacial strength, fracture toughness, thermal residual stresses, friction, and matrix plasticity. The proposed finite element model accounts for these factors and allows for debond propagation based on assigned interfacial properties. Parametric studies demonstrate that higher values for interfacial friction coefficient, thermal residual stress, and interfacial fracture toughness restrict debond propagation, while matrix plasticity facilitates it.
COMPOSITES SCIENCE AND TECHNOLOGY
(2022)
Review
Materials Science, Multidisciplinary
Sina Ahmadvashaghbash, Ignaas Verpoest, Yentl Swolfs, Mahoor Mehdikhani
Summary: This review article investigates the fibre-matrix interface in fibre-reinforced polymers (FRPs) and describes four main interface characterisation methods. The article reviews the interface-forming mechanisms, three primary factors affecting the interface, and critically evaluates detailed data reduction schemes, numerical approaches and challenges. Finally, comprehensive conclusions and future research directions are provided.
INTERNATIONAL MATERIALS REVIEWS
(2023)
Article
Construction & Building Technology
Shuo Feng, Huigang Xiao, Yifei Li
Summary: This study investigates the bond strength between ultra-high-performance concrete (UHPC) and normal-strength concrete (NSC) and develops a modified direct tensile test method to measure the bond strength. The results demonstrate that the modified direct tensile test method can better reflect the effect of roughness on bond performance, especially on rough surfaces.
CEMENT & CONCRETE COMPOSITES
(2022)
Article
Construction & Building Technology
Gang Peng, Ditao Niu, Xiaopeng Hu, Baoxue Pan, Shuai Zhong
Summary: The experimental study investigated the interfacial bond strength between cementitious grout and normal concrete substrate through slant shear tests and splitting tensile tests. The effects of concrete substrate strength, surface roughness, and type of cementitious grout on the bond strength were discussed, with the highest bond strength observed in specimens prepared using CGM-270 overlays. Empirical models for the bond strength were proposed, establishing a linear correlation between slant shear bond strength and splitting tensile bond strength.
CONSTRUCTION AND BUILDING MATERIALS
(2021)
Article
Construction & Building Technology
Tian Lan, Shutong Yang, Mingxin Wang, Mingqi Xu, Shidong Cheng, Zhengyuan Chen
Summary: This study proposes a fracture model to predict the realistic tensile bond strength and fracture toughness of interfaces in 3D printed concrete. The results show that adding manufactured sand improves the interfacial bond strengths. Overall, this research provides novel insights into interfacial behaviors in 3D printed concrete. Evaluation: 8 out of 10.
JOURNAL OF BUILDING ENGINEERING
(2023)
Article
Polymer Science
Cut Rahmawati, Sri Aprilia, Taufiq Saidi, Teuku Budi Aulia, Agung Efriyo Hadi
Summary: This study investigated the effect of natural nanosilica on the mechanical properties and microstructure of geopolymer cement. The addition of 2 wt% nanosilica in the geopolymer paste significantly improved compressive strength, flexural strength, and fracture toughness but decreased direct tensile strength. Microstructure analysis showed the formation of C-A-S-H gel and the development of a compact and cohesive geopolymer matrix with the addition of 2 wt% nanosilica.
Article
Materials Science, Composites
Heshan Bai, Ruixiang Bai, Tianyu Zhao, Zhenkun Lei, Xiang Hong, Chen Liu, Tao Wang
Summary: The study utilized a thermosetting resin with bond exchange reaction and found it to exhibit higher interfacial shear strength. By combining finite element simulation and experimental data, the interface parameters were successfully derived and the pull-out force-displacement curves were in good agreement with experimental results. The study further discussed the interfacial stress transfer and debonding failure behavior.
COMPOSITE INTERFACES
(2022)
Article
Mechanics
Junping Shi, Huiling Jiang, Yifeng Hu, Xiaoshan Cao
Summary: A new test method for fracture toughness was proposed, which could obtain the crack initiation fracture toughness and crack propagation fracture toughness. The method was based on the idea of ubiquitiform geometry and the observation of ubiquitiform characteristics on fracture surfaces. Plate specimens with cracks made of ductile cast iron were subjected to a uniaxial tensile test to generate Mode I fracture failure. The loading-displacement curves were recorded, and the crack-initiation work and crack propagation work were measured. The morphology of the fracture surface was observed through electron microscopy, and the ubiquitiformal complexity was calculated. The formula for ubiquitiform fracture energy was provided, and the relationship between ubiquitiform fracture energy and fracture toughness was analyzed to propose a new test method. The experimental results showed consistent fracture toughness within a certain range of crack lengths.
ENGINEERING FRACTURE MECHANICS
(2022)
Article
Polymer Science
Sarianna Palola, Pekka Laurikainen, Sonia Garcia-Arrieta, Egoitz Goikuria Astorkia, Essi Sarlin
Summary: This study explores the feasibility of reclaiming carbon fibers from aeronautical scrap material using conventional and reactive pyrolysis, and evaluates their potential use in automotive structural components. The results show that recycled carbon fibers can meet the required deformation limits and offer lower production costs and greener composites.
Article
Materials Science, Characterization & Testing
James Thomason
Summary: This paper reviews the potential scaling issues in microbond tests of polymer composites and highlights the differences in structure and properties between microdroplets and macroscale samples.
Article
Thermodynamics
Theodoros Marinopoulos, Lorenzo Zani, Simin Li, Vadim V. Silberschmidt
Summary: Modern developments in biomedical applications require a better understanding of the mechanical behavior of soft biological tissues. This study focuses on numerical simulation parameters for modeling the indentation of a human lower limb, and evaluates the effect of boundary conditions on the model size. The results show a high sensitivity of reaction forces to the direction of indentation misalignments. The research aims to improve our understanding of the mechanical behavior of soft tissues based on numerical methods, supporting the analysis of their mechanical properties and the development of orthopedic and medical procedures.
CONTINUUM MECHANICS AND THERMODYNAMICS
(2023)
Article
Thermodynamics
Dan-Andrei Serban, Gabriel Furtos, Liviu Marsavina, Corina Sosdean, Radu Negru
Summary: This work investigates the mechanical behavior of composite materials consisting of fly ash-based geopolymer reinforced with wood fibers under compressive and flexural loadings, and calibrates constitutive models for the geopolymer using experimental data.
CONTINUUM MECHANICS AND THERMODYNAMICS
(2023)
Article
Chemistry, Physical
Hao Sun, Chenzhe Xu, Xiaoting Yang, Lei Tao, Zheng Wang, Haitao Zhang, Xiang Ji, Juanjuan Ma, Lin Liu, Zhiwei Tong, Zhong Chen
Summary: A novel composite Pd@MgAl-LDH was prepared by using MgAl layered double hydroxide (LDH) as the host material and assembling the precursor (PdCl42-) with exfoliated LDH nanosheets followed by in-situ reduction. The heterogeneous catalyst exhibited evenly distributed Pd NPs with an average particle size of about 3.27 nm supported on LDH nanosheets. The Pd@MgAl-LDH catalyst showed excellent catalytic efficiency for the Heck reaction and could be reused 5 times without significant loss of catalytic activity.
APPLIED CLAY SCIENCE
(2023)
Article
Engineering, Environmental
Xinghua Wu, Minghao Xiao, Junting Zhang, Guohuang Tan, Yutong Pan, Yuekun Lai, Zhong Chen
Summary: In this study, a stable superhydrophobic surface with pressure resistance, chemical stability, biocompatibility, and biofouling resistance was demonstrated. The surface maintained superhydrophobicity under a water pressure of 13.72 kPa for 27 days and could withstand water flush and biological attacks for over 35 days. The mechanical stability of the surface was superior to state-of-the-art coatings. The stable long-lasting underwater superhydrophobic surface is of great importance to marine applications.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Green & Sustainable Science & Technology
Siwei Zhuang, Ning Duan, Linhua Jiang, Feilong Zhang, Jun Hu, Zhong Chen, Fuyuan Xu
Summary: Selective regulation of anodic reaction was achieved by phase-controlled MnO2 (MnO2-PC) on lead-based anodes, effectively addressing issues such as lead-dissolution, anodic slime-generation and high energy-consumption. MnO2-PC with specific crystal planes exposure and rich oxygen vacancy defects enabled higher oxygen evolution reaction selectivity, while synergistically suppressing lead corrosion and manganese oxidation. This study provides an efficient, low-cost, high economic benefits and environmental-friendly strategy for designing target functional materials towards reaction selectivity regulation via phase-control and microstructure reconstruction.
JOURNAL OF CLEANER PRODUCTION
(2023)
Article
Materials Science, Multidisciplinary
Boon Chong Ong, Zhong Chen, Teik-Thye Lim, ZhiLi Dong
Summary: In this study, an effective hole scavenger layer of polyoxometalates (POMs) with excellent redox properties and high durability is coated on titanium dioxide (TiO2) nanorods to enhance the photoelectrochemical (PEC) water oxidation activity. The Co-POMs layers on TiO2 can effectively retard the recombination of photoinduced electron-hole pairs by extracting and transporting the generated holes, resulting in improved overall PEC performance under neutral conditions. This work provides a facile and promising method for promoting PEC water oxidation by depositing Co-POMs layers on TiO2 nanorods.
MATERIALS CHEMISTRY AND PHYSICS
(2023)
Article
Polymer Science
Yasasween Hewavidana, Mehmet N. Balci, Andrew Gleadall, Behnam Pourdeyhimi, Vadim V. Silberschmidt, Emrah Demirci
Summary: The analysis of fibrous structures using micro-computer tomography (μCT) is important as it allows for characterization of material properties. This study aims to compute fiber crimp in different random fibrous networks (RFNs) based on μCT data. A parametric algorithm was developed and successfully tested on six different X-ray μCT models of nonwoven fabrics.
Article
Chemistry, Multidisciplinary
Meng Han, Chuwei Zhou, Vadim V. Silberschmidt, Qinsheng Bi
Summary: Carbon/carbon composites are widely used in re-entry engineering applications due to their excellent mechanical properties, but they are prone to oxidation in the presence of oxygen. This study proposes a microscale degradation model to predict the oxidation behavior and evaluate the residual mechanical properties of the oxidized composite theoretically. A numerical strategy is used to investigate the oxidation mechanism and the results show a decrease in mechanical properties of the composite after oxidation. Stress redistribution and increased stress areas facilitate oxygen diffusion into the matrix and fibers.
Article
Materials Science, Multidisciplinary
Minghua Cao, Konstantinos P. P. Baxevanakis, Vadim V. V. Silberschmidt
Summary: This study investigates the effect of graphite morphology on the thermomechanical performance of Compacted Graphite Iron (CGI) under high temperatures using three-dimensional finite-element models. The results contribute to a better understanding of the correlation between graphite morphology and CGI fracture mechanisms under high temperatures.
Article
Materials Science, Multidisciplinary
M. Muralles, J. T. Oh, Z. Chen
Summary: Interatomic potentials for Fe-Co and Fe-V binary systems are developed to describe the mechanical behaviors of FeCo and FeCo-2V alloys. The results show that disordering inside grains greatly affects the ductility of FeCo, with antiphase domains (APD) mobility inside the grains delaying the ultimate tensile strength (UTS) and fracture point. Adding 2 at.% V to the FeCo alloy decreases the UTS and ductility at room temperature, but introducing V exclusively to the antiphase boundaries (APBs) increases the alloy's ductility.
Article
Materials Science, Multidisciplinary
Qi Wang, Yuheng Deng, Malvern Yap, Yan Yang, Jielin Ma, Wen Kwang Chern, Jin Li, Zhong Chen
Summary: This paper presents a simulation scheme based on the PFCZM for electrical tree modelling and confirms the validity of the model through experiments. The results show that the epoxy resin enhanced with silica and graphene has significant improvements in dielectric breakdown time and thermal conductivity.
MATERIALS & DESIGN
(2023)
Article
Chemistry, Physical
Yogeshvaran R. Nagarajan, Farukh Farukh, Vadim V. Silberschmidt, Karthikeyan Kandan, Radheshyam Rathore, Amit Kumar Singh, Pooja Mukul
Summary: Traditional prosthetic sockets made of composite materials are often unavailable or too expensive for amputees in less-resourced nations. This study investigates the feasibility of using PET fiber-reinforced composites as a low-cost sustainable alternative. The results show that PET-woven and PET-knitted composites have superior mechanical properties compared to traditional socket materials like PP and HDPE. Therefore, it can be concluded that PET-based composites can replace monolithic socket materials in producing durable and affordable prostheses.
Article
Chemistry, Physical
Norman Osa-uwagboe, Amadi Gabriel Udu, Vadim V. Silberschmidt, Konstantinos P. Baxevanakis, Emrah Demirci
Summary: This study investigated the damage mechanism and energy-absorption characteristics of E-glass laminates and sandwich structures with GFRP face sheets with PVC cores under quasi-static indentation. The results showed significant differences in specific energy absorption for different indenter shapes, and the clustering technique applied to acoustic emission signals was able to detect the main damaged modes. These findings provide insights for the optimization and prediction of damage in composite materials.
Article
Polymer Science
Mikhail Tashkinov, Anastasia Tarasova, Ilia Vindokurov, Vadim V. Silberschmidt
Summary: This study focuses on the deformation behavior of composites with auxetic lattice structures as a matrix, investigating the effect of filler properties on the mechanical behavior. Numerical models were developed and experiments were conducted to analyze the effects and the failure probability of the composites.
Article
Engineering, Manufacturing
Chen Zhang, Xiaoxue Wang, Vadim V. Silberschmidt
Summary: In order to overcome the limited vibration performance of current vibration-assisted drilling (VAD) schemes for carbon-fiber-reinforced plastic (CFRP), a novel longitudinal-torsional complex-mode ultrasonic vibration-assisted actuator with single excitation and an elliptical locus is proposed. The actuator utilizes a piezoelectric transducer and a stepped horn with spiral grooves to deliver elliptical vibration and ensure high vibration performance of a tool tip. The actuation mechanism and design process of the actuator are discussed, and its vibration characteristics are verified through finite-element simulation and experimental modal analysis. It is demonstrated that the actuator achieves longitudinal-torsional elliptical vibration and improves the drilling performance of CFRP.
MACHINING SCIENCE AND TECHNOLOGY
(2023)
