Article
Engineering, Manufacturing
Lin Tang, Zhiyong Yang, Yusheng Tang, Junliang Zhang, Jie Kong, Junwei Gu
Summary: The copolymer membrane and AHHFP grafted onto the surface of PBO fibres enhances the interfacial strength and reduces interfacial polarization of the wave-transparent laminated composites. The resulting 6F-PBO@P-GMA fibres/modified cyanate ester composites exhibit higher flexural strength and interlaminar shear strength compared to composites with pristine PBO fibres, with excellent wave-transparency properties at X-band.
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
(2021)
Article
Mechanics
A. Goumghar, M. Assarar, W. Zouari, K. Azouaoui, A. El Mahi, R. Ayad
Summary: This paper presents an experimental study on the fatigue behavior of non-hybrid and hybrid twill flax and glass fabric-reinforced epoxy laminates. The results show that the flax-glass hybridization improves the fatigue performance of the glass-epoxy laminate. The acoustic emission (AE) analysis helps identify the main damage mechanisms of the materials.
COMPOSITE STRUCTURES
(2022)
Article
Chemistry, Physical
Jan-Paul Lanwer, Svenja Hoeper, Lena Gietz, Ursula Kowalsky, Martin Empelmann, Dieter Dinkler
Summary: This study investigates the fatigue bond behavior of brass-coated high-strength micro steel fibers embedded in ultra-high performance concrete (UHPC). Experimental pullout tests and numerical simulations were conducted to analyze the performance of fibers under different loading conditions.
Article
Construction & Building Technology
Thamer Alomayri, Babar Ali
Summary: This paper examines the influence of different agro-based fibers (such as coconut fiber, jute fiber, and banana fiber) on the flexural-tensile and drying shrinkage response of high-performance concrete. The results show that jute fiber and banana fiber have better mechanical performance and shrinkage resistance compared to coconut fiber and synthetic polypropylene fiber. Jute fiber has a significant inhibitory effect on concrete shrinkage. Overall, jute fiber performs relatively better in enhancing strength properties and shrinkage resistance of high-performance concrete.
JOURNAL OF BUILDING ENGINEERING
(2023)
Article
Materials Science, Paper & Wood
S. Maraghechi, E. Bosco, A. S. J. Suiker, J. P. M. Hoefnagels
Summary: This paper proposes a novel experimental methodology for the evaluation of the local mechanical behavior of organically-formed and regenerated cellulose fibers. The method combines in-situ micro-tensile testing with optical profilometry to accurately assess the fibers' cross-sectional area profile and determine the local stress-strain curves. The proposed methodology is particularly suitable for analyzing limited samples from valuable and historical objects.
Article
Engineering, Manufacturing
Zheng Liu, Xiaoli Fan, Junliang Zhang, Zhiyong Yang, Yusheng Tang, Jianwei Li, Jie Kong, Junwei Gu
Summary: The introduction of hyperbranched structure and fluorine groups in epoxy-preFHBPBO significantly improved the mechanical properties and wave-transparent performance of PBO fibers reinforced BADCy resins composites. The addition of 7 wt% epoxy-preFHBPBO increased the flexural strength and interlaminar shear strength, while reducing dielectric constant and dielectric loss compared to PBO fibers/BADCy composites. Moreover, the volume resistivity and breakdown strength were also enhanced in PBO fibers/FHBPBO-co-BADCy composites.
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
(2021)
Article
Engineering, Manufacturing
X. Sourd, R. Zitoune, L. Crouzeix, M. Coulaud, D. Lamouche
Summary: The study investigated the effect of abrasive water jet on 3D woven CFRP composite, finding that an increase in crater volume leads to degradation in mechanical performance of specimens. However, for surface preparation purposes, it did not significantly damage the materials.
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
(2021)
Article
Polymer Science
Mohd Khairul Rabani Hashim, Mohd Shukry Abdul Majid, Mohd Ridzuan Mohd Jamir, Farizul Hafiz Kasim, Mohamed Thariq Hameed Sultan, Ain Umaira Md Shah, Kamarul Arifin Ahmad, Adi Azriff Basri
Summary: This study investigated the fatigue behavior of pineapple leaf fiber/carbon hybrid laminate composites with different stacking sequences. The results showed that the laminate with specific stacking sequence PCCP_45090 exhibited the highest tensile strength and outstanding fatigue performance. The study also found that the ply orientations significantly influenced the fatigue behavior of the composites.
Article
Engineering, Mechanical
Lucas Azevedo, Nikolai Kashaev, Christian Horstmann, Volker Ventzke, Carlos Furtado, Pedro M. G. P. Moreira, Paulo J. Tavares
Summary: This study investigates the effect of laser shock peening (LSP) on the fatigue behavior of AISI D2 steel samples. The results show that LSP treatment can suppress fatigue crack propagation, increase fatigue strength, and reduce the tendency to form secondary cracks.
INTERNATIONAL JOURNAL OF FATIGUE
(2022)
Article
Construction & Building Technology
Jerzy Jasienko, Krzysztof Raszczuk, Dawid Wojcik
Summary: This study focused on strengthening stocky masonry pillars in bed joints using stainless steel cords and PBO fibres. Ten physical models were tested, with 3 serving as reference specimens and the remaining seven confined using different techniques. The experiment determined the main failure mechanisms, load-bearing capacity, and deformations of the pillars. It also evaluated the effectiveness of the strengthening methods in terms of increased load-bearing capacity, stiffness, and prevention of cracking, without compromising the visual appearance of historic structures.
CONSTRUCTION AND BUILDING MATERIALS
(2023)
Article
Engineering, Civil
Gang Chen, Danying Gao, Haitang Zhu, Jian Song Yuan, Xu Xiao, Weiqiang Wang
Summary: The bending strength of steel fiber reinforced concrete beams depends on concrete strength rather than fiber properties. Increasing fiber dosage, length, etc. can enhance the bending strength. New empirical equations can accurately predict the Limit of Proportionality and residual flexural tensile strength of steel fiber reinforced concrete.
Article
Construction & Building Technology
Yao Zhang, Zixi Jiao, Lei Deng, Lingzhi Xie, Bo He, Qianzheng Liang, Hengyi Wu, Zhihai Liu
Summary: In this study, the effect of commonly used commercial cellulose fibers on cement paste was investigated. It was found that the incorporation of cellulose fibers significantly inhibited hydration, with a higher inhibition observed for shorter fibers. Only millimeter-scale fibers showed a significant improvement in post-peak ductility, while micron-scale fibers had a weak enhancement effect. Both micron-scale and millimeter-scale cellulose fibers enhanced the tensile strength at day 28. The use of millimeter-scale cellulose fibers was found to be optimal for improving tensile behavior.
CONSTRUCTION AND BUILDING MATERIALS
(2022)
Article
Materials Science, Multidisciplinary
Yuhan Lin, Xiaoli Fan, Lin Tang, Yusheng Tang, Junwei Gu
Summary: This paper presents a POSS-PNF composite paper with low dielectric constant, low dielectric loss, high wave-transparency coefficient, and excellent mechanical properties, flame retardancy, and UV aging resistance. The composite paper shows potential applications in aerospace, wearable flexible electronic devices, and 5G communication.
ADVANCED FIBER MATERIALS
(2023)
Article
Construction & Building Technology
Arash Karimipour, Mahmoud Edalati, Jorge de Brito
Summary: This study evaluates the biaxial performance of polypropylene fibres reinforced self-compacting concrete under various stress levels. Experimental results show that in biaxial compression, cracks are stopped by the minimum principal stress, thereby preventing the creation of tensile stress caused by the maximum principal stress.
CONSTRUCTION AND BUILDING MATERIALS
(2021)
Article
Engineering, Mechanical
Zhen Liao, Bing Yang, Shoune Xiao, Guangwu Yang, Tao Zhu
Summary: The mechanical properties of Al-Mg4.5Mn alloy manufactured by hybrid in situ rolled wire + arc additive manufacturing (HRAM) in different notch orientations were evaluated. Fatigue crack propagation (FCG) tests were conducted on HRAM-processed Al-Mg4.5Mn alloy specimens, and the microstructure near the crack tip was analysed using electron backscatter diffraction. The results showed that the mechanical properties and FCG behavior of the HRAM-processed Al-Mg4.5Mn alloy were correlated with microstructural features and stress ratio, with superior tensile properties compared to commercial ER5087.
INTERNATIONAL JOURNAL OF FATIGUE
(2021)
Article
Engineering, Manufacturing
Mael Arhant, Eric Lolive, Thomas Bonnemains, Peter Davies
Summary: It was found in the study that carbon/polyamide 6 thermoplastic composites subjected to wet aging exhibited a significant decrease in fracture toughness, leading to a transition from ductile to brittle behavior.
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
(2022)
Review
Construction & Building Technology
A. Weir, A. Jimenez del Barco Carrion, C. Queffelec, B. Bujoli, E. Chailleux, C. N. Uguna, C. Snape, G. Airey
Summary: Biobinders are gaining popularity in asphalt engineering due to environmental concerns and depleting petroleum bitumen reserves. This review explores the link between biomass thermochemical conversion technologies and biobinders in pavement engineering, highlighting the importance of biomass source and production technology on biobinders' performance.
CONSTRUCTION AND BUILDING MATERIALS
(2022)
Article
Engineering, Ocean
Cedric Bain, Yann Marco, Peter Davies, Guilhem Bles, Thibault Reinhart, Pierre-Antoine Albouy
Summary: The low friction coefficient of HMPE fibers has both advantages and disadvantages. A recent innovation in sailboat pulleys utilized this property. During the study, a phenomenon called "lustering" was observed, which results from the compaction of HMPE fiber filaments in the rope loop.
APPLIED OCEAN RESEARCH
(2022)
Article
Materials Science, Textiles
Cedric Bain, Peter Davies, Luc Riou, Yann Marco, Guilhem Bles, Guillaume Damblans
Summary: Friction is a key factor in rope manufacturing and affects the mechanical behavior of fiber assemblies. Understanding and evaluating the friction coefficient between fibers is essential for developing numerical rope models. The angle between fibers and the direction of movement impact the friction coefficient significantly. Lower friction leads to higher abrasion resistance and longer lifetime.
JOURNAL OF THE TEXTILE INSTITUTE
(2023)
Article
Multidisciplinary Sciences
Quentin Dezulier, Alexandre Clement, Peter Davies, Frederic Jacquemin, Mael Arhant, Benjamin Flageul
Summary: This paper presents a study on the long-term behavior of carbon/epoxy composites, examining the interactions between aging in water and constant mechanical loads through experimental and modeling approaches. The results show that a four-parameter Burgers model provides a good fit to the experimental data, indicating the significant impact of water diffusion on the viscoelastic behavior of the materials.
PHILOSOPHICAL TRANSACTIONS OF THE ROYAL SOCIETY A-MATHEMATICAL PHYSICAL AND ENGINEERING SCIENCES
(2023)
Article
Engineering, Mechanical
Alban Robin, Peter Davies, Mael Arhant, Sebastian Le Jeune, Nicolas Lacotte, Eliaz Morineau, Fanny Ioos, Pascal Dourlen, Raphael Cairo
Summary: This study evaluates the performance of alternative sandwich materials with reduced environmental impact under loading conditions relevant to boat design. Compared to traditional PVC foam sandwich materials, flax and bamboo composite faced PET foam sandwich materials have lower flexural stiffness and damage initiation levels, but they show promising support for impact energy levels that could be further improved with facing enhancements.
JOURNAL OF SANDWICH STRUCTURES & MATERIALS
(2023)
Article
Construction & Building Technology
Fanny Levenard, Vincent Gaudefroy, Isabelle Capron, Cedric Petiteau, Emmanuel Chailleux, Bruno Bujoli
Summary: Three bio-based compounds were tested as emulsifiers and stabilizers for bitumen emulsion. The emulsifiers used included biopolymer, native nanoparticles, and hydrophobic modified nanoparticles. Bitumen-in-water emulsions with a bitumen content of 60% were successfully prepared using biopolymers and nanoparticles. The emulsions were compared to a conventional bitumen emulsion with amine-type surfactant. Cold mix asphalt specimens were manufactured and used to evaluate water recovery and stripping resistance, showing different behaviors depending on the emulsion formulation.
ROAD MATERIALS AND PAVEMENT DESIGN
(2023)
Article
Construction & Building Technology
Ana Jimenez del Barco Carrion, Davide Lo Presti, Emmanuel Chailleux, Gordon D. D. Airey
Summary: The investigation focuses on the use of biomaterials as biobinders in asphalt mixtures to decrease the demand for fossil-fuel-based binders and CO2 emissions. The results show that the rheological properties of biobinders' blends are suitable for use, but bio-recycled asphalt mixtures age faster than conventional ones, which is a concern for their full-scale application.
ROAD MATERIALS AND PAVEMENT DESIGN
(2023)
Article
Construction & Building Technology
Amelie Thiriet, Lea Tigier, Vincent Gaudefroy, Jean-Philippe Terrier, Justine Cantot, Jean-Michel Piau, Emmanuel Chailleux
Summary: A new experimental procedure was developed to understand the interfacial forces in cold mix asphalt after emulsion breaking. The procedure mimics the contact between a bitumen droplet and an aggregate particle. Wetting kinetics strongly depend on temperature, but the equilibrium wetting state is temperature independent. The main finding is the significant effect of temperature, with wetting time at 35°C taking around 8 hours while at 10°C it takes approximately eight years. The viscosity at 0 Hz has a linear relationship with the wetting half-life time, which is determined by the interfacial properties of the bitumen, glass, and air.
ROAD MATERIALS AND PAVEMENT DESIGN
(2023)
Article
Environmental Sciences
Louis Le Gue, Peter Davies, Mael Arhant, Benoit Vincent, Erwan Tanguy
Summary: This paper evaluates the use of PBS/PBAT biodegradable rope to minimize the environmental impact of lost fishing gear in the sea. It studies the degradation mechanisms of the rope and its mono-filaments when exposed to seawater over a long period of time. Mono-filaments were immersed in seawater for up to 18 months, and rope samples were also immersed to study aging at a larger scale and assess a modeling tool's ability to predict the state of the rope. The study finds that while there was no loss of properties at low temperatures, biodegradation and hydrolysis processes were observed at higher temperatures, causing faster loss of properties in the mono-filament compared to the rope. The modeling tool's predictions were conservative due to severe mechanical test conditions and a degradation gradient within the rope structure.
MARINE POLLUTION BULLETIN
(2023)
Article
Engineering, Marine
H. Thuilliez, P. Davies, P. Cartraud, M. Feuvrie, T. Soulard
Summary: This article presents a new set of experimental data on nylon ropes, focusing on the dynamic stiffness of nylon mooring lines and their evaluation under realistic conditions. The study also examines the accumulated strain after successive tests. The results show that stiffness is nonlinear with respect to both mean tension and amplitude.
Article
Materials Science, Composites
A. Robin, M. Arhant, P. Davies, S. Lejeune, E. Lolive, T. Bonnemains, B. Habert
Summary: This paper presents an approach that considers aging in the design of marine structures. It includes physical aging and seawater saturation, with the latter being more severe and resulting in up to 30% loss in properties after aging. In-plane and out-of-plane properties of a carbon/epoxy composite were generated and used to model the response of a flexural beam under mixed shear/bending load. The model and test results show reasonable agreement, indicating the strong influence of seawater conditioning on composite performance, with a reduction in strength of around 35% after aging. This approach can be applied to account for seawater aging in composite structure design.
COMPOSITES PART C: OPEN ACCESS
(2023)
Article
Materials Science, Composites
P. Davies, Z. Niu, A. I. Catarino, Y. De Witte, H. Dhakal, C. H. Park, E. Demeyer
Summary: Poly(lactic acid) is a compostable thermoplastic that can be improved by adding compostable flax fibres. Recycling the composite reduces waste and the need for raw materials, but the effects of recycling and seawater exposure on the properties of flax-PLA composites are not well understood. This study explores the changes in properties and toxicity of these materials.
COMPOSITES PART C: OPEN ACCESS
(2023)
Article
Materials Science, Composites
Peter Davies, Mael Arhant, Erwan Grossmann
Summary: This paper presents the experimental study of the mechanical behavior of flax fiber reinforced acrylic composites in seawater. The results show a significant drop in stiffness and a smaller drop in strength for seawater saturated specimens. The relevance of immersion tests is discussed and an alternative unifacial exposure test is recommended.
COMPOSITES PART C: OPEN ACCESS
(2022)
Review
Engineering, Multidisciplinary
Emanuele Quaranta, Peter Davies
Summary: The hydropower sector is undergoing technological developments, with the application of novel materials to improve performance and sustainability. Composite materials, polymers, superhydrophobic materials, and novel bearing materials are highlighted for their potential in reducing energy consumption and wear.
