Cyclic Relaxation, Impact Properties and Fracture Toughness of Carbon and Glass Fiber Reinforced Composite Laminates

Abdellah, Mohammed Y.; Hassan, Md. Salleh; Mohamed, Ahmed F.; Backar, Ahmed H.

doi:10.3390/ma14237412

Cited by 5 publications

(2 citation statements)

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“…The specimens used for the fracture toughness test were based on the ASTM standard E399, 34 with recommendations given in the literature. 35 The compact tension (CT) test specimens were cut into standard shapes with diamond-coated discs to investigate the fracture toughness properties of the DPF-reinforced polyester and DPF/sheep wool–polyester hybrid composites (see Supplemental Figure 4). The crack strength must be measured at the beginning of the degradation to obtain satisfactory results regarding fracture toughness.…”

Section: Methodsmentioning

confidence: 99%

Mechanical, thermal, and acoustic properties of natural fibre-reinforced polyester

Abdellah

Sadek

Alharthi

et al. 2023

Proceedings of the Institution of Mechanical Engineers, Part E:

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Natural fibres have been used in a wide range of polymer composite reinforcements to produce new composites with good properties that can be used in many applications. In this study, the fracture toughness, acoustic, and thermal properties of date palm fibre (DPF)/polyester composite and DPF/sheep wool hybrid reinforced polyester were investigated. Physical properties, such as water absorption and thickness swelling, have also been reported. Finally, scanning electron microscopy (SEM) images of the composites and hybrids were obtained. The composites and hybrids were produced by compression moulding and cut into standard shapes before being tested. DPF and DPF/sheep wool contents (wt%) were 0%, 10%, 20% and 30%. The test results indicate that the fracture toughness improved from 3.45 MPa·m1/2 (with 0% additive content) to 11.55 MPa·m1/2 (with 20% DPF content) and 13.95 MPa·m1/2 (with 20% hybrid content). The energy release rate increased from 3.99 kJ/M2 (with 0% additive content) to 39.82 kJ/M2 (with 20% DPF content) and 53 kJ/M2 (with 20% hybrid content) due to the good adhesion between the matrix and fibres. DPF improved the acoustic insulation properties of the polyester/DPF composite with mass fractions of 10%, 20%, and 30%. At a frequency of 2000 Hz, the acoustic attenuation in decibels (dB) increased from 16.2 dB with pure polyester to 17.2, 18.2, and 19.5 dB with 10%, 20%, and 30% DPF content, respectively. The increase in sheep wool and DPF hybrids in the polyester matrix increased the acoustic attenuation to 18.4, 20.6, and 24 dB, respectively, because DPF and sheep wool have good acoustic insulation properties. Thermal conductivity was 0.161 W/m·C with 0% additive content, decreasing to 0.133, 0.107, and 0.082 W/m·C with 10%, 20%, and 30% DPF content, respectively, and 0.112, 0.073, and 0.051 W/m·C for 10%, 20%, and 30% DPF/sheep wool hybrid content, respectively, owing to good thermal insulation properties of DPF and sheep wool. Water absorption gradually increased with DPF and DPF/sheep wool hybrid because DPF and sheep wool have good absorption properties. Thickness swelling increased with increasing DPF and DPF/sheep wool hybrid contents but not to the same extent. SEM images indicated good distribution and bonding of DPF with the polyester matrix up to 20% and good results for DPF/sheep wool with the polyester hybrid at 10% and 20% hybrid content.

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Section: Methodsmentioning

confidence: 99%

Mechanical, thermal, and acoustic properties of natural fibre-reinforced polyester

Abdellah

Sadek

Alharthi

et al. 2023

Proceedings of the Institution of Mechanical Engineers, Part E:

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“…Kekerasan adalah sifat suatu material untuk dapat menahan fracture. 8 Sifat mekanis FRC tergantung pada sifat mekanis masing-masing komponen, kualitas impregnasi fiber dengan resin, adhesi antara fiber dan matriks, jumlah fiber dalam matriks resin, volumetrik, dan tipe fiber. 9 Sifat mekanik seperti kekuatan fleksural, compressive strength dan kekerasan juga tergantung pada posisi dan orientasi fiber .…”

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Pengaruh posisi e-glass fiber non dental terhadap kekerasan glass fiber reinforced composite pada gigi tiruan cekat: studi eksperimental

Al Isra,

Sari,

Darmawangsa

2023

Padjadjaran J Dent Res Students

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ABSTRAKPendahuluan Gigi tiruan menjadi solusi yang tepat untuk menggantikan gigi yang hilang. Gigi tiruan jembatan dengan bahan porcelain fused to metal paling sering digunakan dalam praktik klinis, namun memiliki kekurangan seperti efek alergenik dan efek toksisitas yang dapat disebabkan oleh bahan logam, rentan pecah, memerlukan beberapa kali kunjungan, dan membutuhkan preparasi gigi abutment yang cukup luas. Alternatif bahan yang dapat digunakan untuk gigi tiruan cekat adalah Fiber reinforced composite dengan E-glass fiber dental yang memiliki kelebihan seperti biokompatibilitas baik, memiliki kekuatan kompresi dan estetika yang baik. Ketersediaan E-glass fiber dental di Indonesia masih terbatas dengan harga yang cukup mahal. E-glass fiber non dental secara umum telah digunakan di bidang teknik. E-glass fiber non dental memiliki komposisi yang sedikit berbeda dengan E-glass fiber dental. Tujuan dari penelitian ini untuk mengetahui pengaruh posisi E-glass fiber non dental terhadap kekerasan Fiber reinforced composite. Metode: Penelitian eksperimental dengan Fiber reinforced composite dengan E-glass fiber non dental dengan 3 kelompok sampel yang teridiri dari kelompok posisi tension side, kelompok compression side, dan kelompok neutral axis yang masing masing terdiri dari 6 sampel. Sampel diuji dengan vickers hardness tester dengan beban 100gf selama 15detik, jejak indentasi dihitung untuk mendapatkan vickers hardness number (VHN). Hasil: Hasil uji pada Fiber reinforced composite dengan fiber pada posisi tension side memiliki kekerasan tertinggi dengan nilai 45,77 VHN. Fiber reinforced composite dengan fiber pada neutral axis 43,35 VHN. Fiber reinforced composite dengan fiber pada compression side memiliki nilai terendah 39,60 VHN. Simpulan: Kesimpulan dari penelitian ini bahwa terdapat pengaruh posisi E-Glass fiber non dental terhadap kekerasan Fiber reinforced composite.KATA KUNCI: E-glass fiber, Fiber reinforced composite, posisi fiber, kekerasanThe Effect of Non-dental E-glass Fiber Position on the Hardness of Glass Fiber Reinforced Composite in Fixed DenturesABSTRACT Introduction: Dentures are the right solution to replace missing teeth. Denture bridges made from porcelain fused to metal are the most frequently used in clinical practice, but they have disadvantages such as allergenic and toxicity effects that can be caused by metal materials, are prone to breaking, require several visits, and require extensive preparation of the abutment teeth. Alternative materials that can be used for fixed dentures are fiber-reinforced composites with E-glass dental fiber, which have advantages such as good biocompatibility, compression strength, and aesthetics. The availability of E-glass fiber dental in Indonesia is still limited, with prices being quite expensive. Non-dental E-glass fiber has generally been used in the engineering field. Non-dental E-glass fiber has a slightly different composition from dental E-glass fiber. The aim of this research is to determine the effect of the position of non-dental E-glass fiber on the hardness of fiber-reinforced composites. Method: Experimental research with fiber-reinforced composite with non-dental E-glass fiber with 3 sample groups consisting of the tension side position group, compression side group, and neutral axis group, each consisting of 6 samples. The sample was tested with a Vickers hardness tester with a load of 100 gf for 15 seconds, and the indentation trace was calculated to obtain the Vickers hardness number (VHN). Results: The test results on fiber-reinforced composites with fiber in the tension-side position had the highest hardness with a value of 45.77 VHN. Fiber composite reinforced with fiber on the neutral axis is 43.35 VHN. Fiber-reinforced composites with fiber on the compression side have the lowest value of 39.60 VHN. Conclusion: The conclusion from this research is that there is an influence of the position of non-dental E-Glass fiber on the hardness of fiber-reinforced composites.KEY WORDS: E-glass fiber, Fiber reinforced composite, fiber position, hardness

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Mechanical Characterization of Nano‐SiO₂‐Reinforced Epoxy Sandwich Composites With 3D Rayon Graphite Felt Core and Woven Carbon Fiber Face Sheets

Nayyef,

Taieh,

Beddai

et al. 2025

Journal of Nanotechnology

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New epoxy (EP)‐based sandwich composites have enhanced mechanical performance and optimized cost‐effectiveness, as a result of composites’ increasing popularity. This study aims to develop composites with 3, 5, and 7 layers of woven carbon fibers (WCFs) layered on 3D rayon‐based graphite felt (3D RGF) as the core of the sandwich composites. Using WCFs as face sheet layers increases flexural strength and modulus. Flexural strength increases to 226.92 MPa, and modulus increases to 15.18 GPa with 3 WCFs layers. Five layers increase modulus to 25.43 GPa and flexural strength to 370.21 MPa. Seven layers provide the highest modulus of 31.38 GPa and flexural strength of 405.07 MPa. Diverse concentrations of nanosilica (0.01, 0.1, 0.5, and 0.8 wt%) were embedded within the core to bolster its mechanical properties. Using an in situ casting method, an EP resin solution was infused into the structure, forming a bicontinuous composite. This method significantly enhances the toughness and adhesion between the fibers and the EP resin, resulting in superior mechanical properties. EP alone has 57‐MPa tensile strength, but three layers of WCFs increase it to 531.38 MPa, five layers increase it to 647.24 MPa, and seven layers increase it to 764.40 MPa. The minimum tensile modulus of EP is 2.75 ± 0.5 GPa. The modulus increases significantly when layers of WCFs are added, reaching 9.75 GPa with three layers, 14.96 GPa with five layers, and a maximum value of 23.44 GPa with seven layers. When a little amount of nanosilica was added, the flexural properties of composites were significantly affected. Among all concentrations, 0. 5 wt% nano‐SiO2 yielded the highest enhancement of flexural strength and modulus. At 0.1 wt% nanosilica, the flexural strength and modulus of the sandwich composites increase to 493.5 MPa and 30.5 GPa (23.4% and 24.5%). The peak occurs at 0.5 wt%, reaching 645.7 MPa and 41.5 GPa (61.4% and 69.4%). However, at 0.8 wt%, values drop to 560.1 MPa and 30.4 GPa, still showing 40.0% and 24.1% improvements. This study provides a new solution for reinforcing the mechanical properties of EP sandwich composites. Increasing the performance with nanofiller concentrations is also emphasized.

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Cyclic Relaxation, Impact Properties and Fracture Toughness of Carbon and Glass Fiber Reinforced Composite Laminates

Cited by 5 publications

References 34 publications

Mechanical, thermal, and acoustic properties of natural fibre-reinforced polyester

Mechanical, thermal, and acoustic properties of natural fibre-reinforced polyester

Pengaruh posisi e-glass fiber non dental terhadap kekerasan glass fiber reinforced composite pada gigi tiruan cekat: studi eksperimental

Mechanical Characterization of Nano‐SiO₂‐Reinforced Epoxy Sandwich Composites With 3D Rayon Graphite Felt Core and Woven Carbon Fiber Face Sheets

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