Article
Materials Science, Textiles
Sagar Chokshi, Vijaykumar Chaudhary, Piyush Gohil
Summary: The tensile properties of unidirectional flax/polyester composites were evaluated through mathematical modeling and experimental investigations. The fabrication of flax reinforced polyester composites was carried out using a mould and punch setup, and the hand layup technique. Tensile testing of different materials was conducted according to ASTM standards, and mathematical models were proposed to evaluate the longitudinal elastic modulus of the composite.
FIBERS AND POLYMERS
(2022)
Article
Materials Science, Multidisciplinary
Anni Wang, Xiaogang Liu, Qingrui Yue, Guijun Xian
Summary: Hybrid carbon fiber/flax reinforced polymer composites (HFRPs) are cost-effective materials for structural applications. This study investigated the property evolution of HFRP plates immersed in water at 40 and 70 degrees C for eight weeks. The water uptake and flexural properties of the HFRP samples were analyzed based on hybrid modes and fiber contents. The diffusion coefficient and equilibrium water absorption of HFRPs increased with temperature, and the deterioration of performance was more pronounced. HFRPs with carbon fibers on the surface showed better hydrothermal resistance and lower water absorption compared to other hybrid modes.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Materials Science, Multidisciplinary
Anni Wang, Xiaogang Liu, Qingrui Yue, Guijun Xian
Summary: Flax/carbon fiber hybrid reinforced polymer composites were prepared to improve the mechanical properties. The effects of carbon fiber volume fraction, carbon fiber monolayer thickness, and hybrid mode on the properties of hybrid composites were studied by tensile tests. The results showed that the hybrid composites achieved positive hybrid effects with a minimum repeating unit of flax fiber as skin and carbon fiber as core.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Polymer Science
Lara Alam, Benoit Piezel, Olivier Sicot, Shahram Aivazzadeh, Sandrine Moscardelli, Laetitia Van-Schoors
Summary: Previous studies have focused on photooxidation of natural fiber composites using short fibers and virgin matrices. This study compares the accelerated aging of unidirectional flax fiber composites with virgin and recycled polypropylene matrix prepared by thermocompression. The results show that photooxidation only occurs on the surface and can be identified through the appearance of cracks, variation of crystallinity, decrease in weight average molar mass, and presence of new chemical products. Despite these changes, the mechanical tensile properties of composites with recycled polypropylene remain relatively unaffected compared to those with virgin polypropylene. Therefore, well-selected recycled polypropylene can be used as a replacement for virgin polypropylene in natural fiber composites to enhance their mechanical resistance to photooxidation.
POLYMER DEGRADATION AND STABILITY
(2023)
Article
Engineering, Manufacturing
Babak Fazlali, Shailee Upadhyay, Sagar Ashokbhai Ashodia, Francisco Mesquita, Stepan Lomov, Valter Carvelli, Yentl Swolfs
Summary: Tensile testing of unidirectional composites often results in premature failure in the end tab region. This study investigates different conventional and novel designs to find the method that minimizes geometric discontinuity and maximizes failure strain. Finite element models are used to predict stress concentrations and optimize the geometry of the end tabs. Experimental results show that specimens with novel arrow-shaped tabs and continuous tabs yield the highest failure strain, avoiding premature failure effectively.
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
(2023)
Article
Materials Science, Multidisciplinary
Chuan Wang, Renjuan Sun, Xinlei Hu, Yanhua Guan, Yingzi Yang, Wei Lu, Jun Tian, Hongzhi Zhang, Zhi Ge, Branko Savija
Summary: This paper investigates the chloride penetration behavior of ECC under sustained flexural loads. It examines the relationship between surface chloride content and maximum normal tensile stress, and develops a binary model to explain the correlation among chloride ion diffusion coefficient, maximum normal tensile stress, and exposure time. It also measures the changes in capillary pore structure and phase compositions and explores the role of fiber bridging in limiting crack width and diffusion process.
MATERIALS TODAY COMMUNICATIONS
(2023)
Article
Green & Sustainable Science & Technology
Sami Allagui, Abderrahim El Mahi, Jean-Luc Rebiere, Moez Beyaoui, Anas Bouguecha, Mohamed Haddar
Summary: This study investigates the effects of recycling on the properties of flax fiber reinforced thermoplastic composites, specifically focusing on Elium resin. The findings indicate a decrease in failure tensile properties during recycling operations, although there is an increase in elastic modulus. Dynamic stiffness shows improvement with recycling, while the impact on the loss factor seems to be minimal. The experimental and numerical results are closely aligned.
JOURNAL OF RENEWABLE MATERIALS
(2021)
Article
Agricultural Engineering
Laetitia Van Schoors, Thomas Cadu, Sandrine Moscardelli, Loic Divet, Stephane Fontaine, Olivier Sicot
Summary: The study focuses on the impact of moisture variations during one-year cyclic hygrothermal ageing on the transverse properties of a unidirectional epoxy flax composite. It reveals that the decrease in transverse ultimate tensile strength and modulus is mainly due to the physical plasticization of the epoxy matrix, rather than chemical degradation caused by water.
INDUSTRIAL CROPS AND PRODUCTS
(2021)
Article
Polymer Science
Amy Engelbrecht-Wiggans, Zois Tsinas, Ajay Krishnamurthy, Amanda L. Forster
Summary: There is an increasing use of flexible unidirectional composite laminates in the construction of ballistic-resistant body armor. These laminates are made up of multiple layers of hexagonally packed high-performance fibers and low modulus matrix. The tensile behavior of an ultra-high molar mass polyethylene flexible laminate aged at accelerated conditions was investigated and showed less than 10% degradation in tensile strength, indicating high reliability for armor made from this material.
Article
Engineering, Environmental
Chao Liu, Claude Berard, Lijun Deng
Summary: Deep soil mixing with high cement contents in cold regions is important but not well studied. This study examined the mechanical behavior of soilcrete under freezing/thawing conditions. The results showed that the compressive and tensile strength of soilcrete increased with curing age but decreased with more freezing/thawing cycles. The lower temperature caused more severe damage and the mass loss reflected the impact of freezing/thawing cycles.
COLD REGIONS SCIENCE AND TECHNOLOGY
(2023)
Article
Engineering, Multidisciplinary
Vinayak S. Uppin, P. S. Shivakumar Gouda, I Sridhar, Jyoti V. Vastrad
Summary: This paper investigates the influence of Flax fiber orientations on the tensile and viscoelastic response of Carbon/Flax hybrid composite. The composite laminates with different fiber orientations were prepared and tested for strength, strain, toughness, storage modulus, loss modulus, and damping factor. The results show that the maximum tensile strength is observed in the 0-Degree oriented Flax fiber carbon epoxy laminates, while the strain increases with 30-Degree orientation. Additionally, changes in storage modulus, loss modulus, and damping factor are observed for different flax fiber orientations.
ENGINEERING RESEARCH EXPRESS
(2023)
Article
Materials Science, Textiles
Sateeshkumar Kanakannavar, Jeyaraj Pitchaimani, Kheng-Lim Goh
Summary: Biodegradable composites were successfully fabricated by incorporating flax braided-yarn woven fabric into poly-lactic acid (PLA). The addition of the braided-yarn fabric as reinforcement resulted in improved tensile fracture strength and toughness of the PLA composite. The increase in fibre content corresponded to an enhanced fracture toughness of the composite.
FIBERS AND POLYMERS
(2023)
Article
Materials Science, Textiles
Sateeshkumar Kanakannavar, Jeyaraj Pitchaimani, Kheng-Lim Goh
Summary: Biodegradable composites were made by reinforcing poly-lactic acid (PLA) with flax braided-yarn woven fabric through solution casting and compression moulding processes. The tensile fracture properties were evaluated using the DENT test and the fractographic features were observed by scanning electron microscope. The braided-yarn fabric reinforcement improved the tensile fracture strength and toughness of the PLA composite. The fracture toughness of the composite increased with the fiber contents, corresponding to 64%, 79% and 89% for 1, 2 and 3 layers of fabric respectively. The improvement in tensile fracture characteristics may be attributed to the effective interfacial bonding of fiber matrix.
FIBERS AND POLYMERS
(2023)
Article
Materials Science, Multidisciplinary
Femiana Gapsari, Anindito Purnowidodo, Putu Hadi Setyarini, Suteja Suteja, Zainul Abidin, Sanjay Mavinkere Rangappa, Suchart Siengchin
Summary: This study describes the successful development of timoho fiber-reinforced polyester composites combined with iron powder filler. The addition of iron powder filler improved the tensile strength and compressive strength of the composites while reducing the elongation. Additionally, the thermal stability and flame resistance of the composites were enhanced.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2022)
Article
Engineering, Geological
Junghee Park, J. Carlos Santamarina
Summary: This study investigates the load-deformation behavior of sands under high- and low-stress cycles. The findings suggest that sands exhibit critical changes in void ratio and stiffness after a certain number of high-stress or low-stress cycles, and they also increase in stiffness during repetitive loading due to crushing and contact flattening effects.
JOURNAL OF GEOTECHNICAL AND GEOENVIRONMENTAL ENGINEERING
(2023)
Article
Engineering, Marine
T. Allen, M. Battley
Article
Mechanics
T. Allen, M. Battley
COMPOSITE STRUCTURES
(2016)
Article
Engineering, Multidisciplinary
Marie Joo Le Guen, Roger H. Newman, Alan Fernyhough, Grant W. Emms, Mark P. Staiger
COMPOSITES PART B-ENGINEERING
(2016)
Article
Mechanics
Youming Chen, Raj Das, Mark Battley
JOURNAL OF APPLIED MECHANICS-TRANSACTIONS OF THE ASME
(2016)
Article
Engineering, Environmental
Marie-Joo Le Guen, Valentin Thoury-Monbrun, Jose M. Castellano Roldan, Stefan J. Hill
JOURNAL OF POLYMERS AND THE ENVIRONMENT
(2017)
Article
Engineering, Marine
Ahmed Swidan, Giles Thomas, Dev Ranmuthugala, Walid Amin, Irene Penesis, Tom Allen, Mark Battley
Article
Materials Science, Coatings & Films
Jerome Leveneur, Alina Rajan, John McDonald-Wharry, Marie-Joo Le Guen, Kim Pickering, John Kennedy
SURFACE & COATINGS TECHNOLOGY
(2018)
Article
Engineering, Manufacturing
Sarat Singamneni, Anthony Warnakula, Dawn A. Smith, Marie Joo Le Guen
3D PRINTING AND ADDITIVE MANUFACTURING
(2019)
Article
Materials Science, Paper & Wood
Mohammad M. Hassan, Marie J. Le Guen, Nick Tucker, Kate Parker
Article
Chemistry, Applied
Beko Mesic, Mathew Cairns, Lars Jarnstrom, Marie Joo Le Guen, Robin Parr
PROGRESS IN ORGANIC COATINGS
(2019)
Article
Chemistry, Applied
M. M. Hassan, N. Tucker, M. J. Le Guen
CARBOHYDRATE POLYMERS
(2020)
Article
Chemistry, Multidisciplinary
Marie-Joo Le Guen, Stefan Hill, Dawn Smith, Beatrix Theobald, Evamaria Gaugler, Abdellatif Barakat, Claire Mayer-Laigle
FRONTIERS IN CHEMISTRY
(2019)
Article
Polymer Science
Muhammad Harris, Hammad Mohsin, Rakhshanda Naveed, Johan Potgieter, Kashif Ishfaq, Sudip Ray, Marie-Joo Le Guen, Richard Archer, Khalid Mahmood Arif
Summary: This research investigates the moisture-based degradation of a 3D-printed polypropylene and polylactic acid blend. The study proposes a combination of physical interlocking and chemical grafting to achieve stability against degradation. The results show that the partial blend with excessive interlocking exhibits high mechanical stability against moisture-based degradation.
Article
Polymer Science
Muhammad Harris, Hammad Mohsin, Johan Potgieter, Kashif Ishfaq, Richard Archer, Qun Chen, Karnika De Silva, Marie-Joo Le Guen, Russell Wilson, Khalid Mahmood Arif
Summary: This research introduces a partially biodegradable polymeric blend for large-scale fused deposition modeling. The blend demonstrates high stability against soil biodegradation, with excellent mechanical strength and high mass retention percentage.
Article
Materials Science, Multidisciplinary
R. Velu, A. Fernyhough, D. A. Smith, M. Joo Le Guen, S. Singamneni
LASERS IN ENGINEERING
(2016)