Study of the fatigue behaviour of hybrid flax-glass/epoxy composites

Goumghar,; Assarar, Mustapha; Zouari, Wajdi; Azouaoui, Krimo; Mahi, Abderrahim El; Ayad, Rézak

doi:10.1016/j.compstruct.2022.115790

Cited by 13 publications

(8 citation statements)

References 33 publications

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“…To evaluate damage progression in composite materials, the damping or loss factor (η) is widely used as it is more sensitive in detecting changes compared to stiffness evolution. The damping factor quantifies the proportion of dissipated energy with the potential energy of a given fatigue cycle [25,26]. It can be calculated using the following equation:…”

Section: Loss Factor and Energy Dissipationmentioning

confidence: 99%

“…It is important to acknowledge that limited research has been conducted on the fatigue behavior of natural fiber fique composites. However, studies by authors such as Dobah et al [17], focusing on jute composite reinforcement, and the extensive exploration of flax by Haggui et al [26] and Goumghar et al [25] served as references guiding our study. Comparing the results obtained in our study with theirs showcases the promising performance of fique as a reinforcement material for composites.…”

Section: Fatigue Behaviormentioning

confidence: 99%

“…In the first stage, there is a rapid decrease in energy, followed by a second stage of stabilization where degradation is minimal. The loss factor is commonly regarded as a more precise indicator of the degradation process in composite materials due to its higher sensitivity compared to stiffness evolution [25].…”

Section: Loss Factor and Energy Dissipationmentioning

confidence: 99%

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Uniaxial fatigue study of a natural-based bio-composite material reinforced with fique natural fibers

Chaves Garcia,

Castro Bermudez,

Pertuz Comas

2024

Frattura Ed Integrità Strutturale

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This research addresses environmental concerns by exploring environmentally friendly composite materials as substitutes for non-biodegradable synthetic fibers. The study proposes the development of polymer matrix composites reinforced with natural fique fibers, sourced from a plant cultivated in Colombia. A BioPoxy 36 polymer matrix with a high carbon content was used and reinforced with fique fabric using the vacuum-assisted lamination method. To improve the adhesion between the fibers and the matrix, an alkaline chemical treatment was applied to the fiber using 2% sodium hydroxide by weight. Mechanical properties were assessed through ASTM D3039 tensile and ASTM D3479 fatigue tests. A fractographic analysis was also conducted to identify the different modes of failure present. In terms of material degradation, distinct stages were observed, characterized by stiffness loss and loss factor indicators. The Coffin-Manson model was used to obtain the strain life curve for R = 0.1, using these factors as criteria. The static properties of the composite reinforced with fique fibers indicate an increase of 45% in ultimate strength, 145% in strain, and 27% in Young's modulus compared to the unreinforced matrix. In terms of dynamic properties, the elastic modulus showed a maximum variation of up to 7.88%. Electron microscopy reveals the failure mechanism, a distinct separation between the matrix and the fiber can be observed as a result of mechanical stress. The analysis reveals the brittle fracture of the hard fique fiber and some matrix separation, as well as possible fractured bubbles that may have occurred during the manufacturing process.

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Section: Loss Factor and Energy Dissipationmentioning

confidence: 99%

Section: Fatigue Behaviormentioning

confidence: 99%

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Uniaxial fatigue study of a natural-based bio-composite material reinforced with fique natural fibers

Chaves Garcia,

Castro Bermudez,

Pertuz Comas

2024

Frattura Ed Integrità Strutturale

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“…Composite materials are especially damaged under two conditions such as material damage starting an insignificant crack (initiation) followed by the propagation of damage, and such problems occur before damage to the composite material. The composite laminate failure criteria are expressed as follows in mathematical equations [29,32,33],…”

Section: Failure Criteria In Laminatesmentioning

confidence: 99%

Ansys-Based Evaluation of Natural Fiber and Hybrid Fiber-Reinforced Composites

Kumpati

Skarka

2022

Sustainability

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In this research, we analyzed natural composite structures that optimize the material and weight of the structure. Green composites are made of natural fibers and epoxy resin that are biodegradable, recyclable, and eco-friendly. Core material failures include wrinkling, failure in compression, and buckling. To address these issues, this work attempted to create CAD models using jute fiber, glass fiber, and epoxy resin with various ply sequences using angle orientations of 0°, 30°, and 45°, and 2–4 mm thick laminates were produced. After creating CAD models, the material strength, stiffness, deformation of samples, shear strength, strain, and other mechanical properties of the natural-fiber-reinforced composite laminates were analyzed. The samples were based on two layers of glass fiber as a core with natural fiber plies below and above this core. The natural fiber with epoxy resin, the hybrid composite with jute fiber, and the glass fiber with epoxy resin were prepared and mechanical properties of the samples were evaluated with Ansys. The results indicated that the 0° ply orientation of 3 mm thickness had a low deformation (0.237 mm) and was the best material. The tensile test was performed for natural-fiber-reinforced composite and hybrid natural reinforced composite laminates at various thicknesses and at various ply orientations using a tensile load of 2500 N. In this investigation, the best material was the one with the thickness of 3 mm with the Young modulus 35.59 GPa at 0.149 strain with 5303 Pa stress conditions. Further, the above conditions were noted with low deformation (0.237 mm) at 0° ply orientation and tensile strength was noted as 1188 GPa at 3 mm with 45° ply orientation. This hybrid composite material can be considered for unmanned aerial vehicle applications.

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“…RTM üretim süreci öncesinde tasarımın iyi yapılması; nihai şekle yakın karmaşık parçaların üretilmesini sağlar ve orta hacimli miktarlar için uygun maliyetli yapısal parçaların üretilmesini sağlar. Bu avantajlara ek olarak, iyi yapışma özellikleri sayesinde metal yapılara özgü olan bağlantı sorunları oluşmaz (Poodts et al 2014, Goumghar et al 2022.…”

Section: Introductionunclassified

The Effect of Gelcoat and Lamination Plan on Mechanical Properties of the Final Product in RTM Method

TOPBAŞOĞLU

Kaboglu

KELEŞ

2023

Afyon Kocatepe University Journal of Sciences and Engineering

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Bu çalışmada, Reçine Transfer Kalıplama (RTM) yöntemiyle üretilmiş cam fiber takviyeli kompozit plakalarda elyaf ağırlığının ve jelkotun mekanik özelliklere etkisi incelenmiştir. Üç farklı laminasyon planı ve bu planların jelkotlu halleri kullanılmıştır. Numunelerin incelenmesi için çekme testi, üç nokta eğme testi ve Barcol sertlik testleri yapılmıştır. Laminasyon planlarında 300 g/m2, 450 g/m2, 600 g/m2 olmak üzere 3 farklı ağırlıkta elyaf kullanılmıştır. Ayrıca laminasyon arasında 180 g/m2 ve 250 g/m2 polipropilen köpük malzeme kullanılmıştır. Her laminasyon için bir jelkotlu, bir jelkotsuz plaka üretilmiştir. Üretim sonunda kalınlıkları 2.5 – 3.2 mm arasında değişen 6 plaka üretilmiştir. Üç nokta eğme ve çekme testi için 10’ar numune kesilmiştir, Barcol sertlik testi plaka üzerinde 5 noktadan alınmıştır. Testler sonucunda elyaf ağırlığının artmasıyla mukavemet değerlerinin arttığı, uzama değerlerinin azaldığı gözlemlenmiştir. Her laminasyonun jelkotlu hallerinde %5 - 15 aralığında mekanik özellik düşüşü gözlemlenmiştir.

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Study of the fatigue behaviour of hybrid flax-glass/epoxy composites

Cited by 13 publications

References 33 publications

Uniaxial fatigue study of a natural-based bio-composite material reinforced with fique natural fibers

Uniaxial fatigue study of a natural-based bio-composite material reinforced with fique natural fibers

Ansys-Based Evaluation of Natural Fiber and Hybrid Fiber-Reinforced Composites

The Effect of Gelcoat and Lamination Plan on Mechanical Properties of the Final Product in RTM Method

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