A statistical analysis of the tensile failure and hybrid effect of an intraply hybrid composite

1995 ◽  
Vol 68 (4) ◽  
pp. 351-362 ◽  
Author(s):  
Qing-Dun Zeng
Keyword(s):  
Statistical Analysis ◽  
Hybrid Composite ◽  
Tensile Failure ◽  
Hybrid Effect ◽  
Intraply Hybrid Composite

On the Direction of Fatigue Cracks in Polycrystalline Ingot Iron

1952 ◽  
Vol 19 (1) ◽  
pp. 54-56
Author(s):  
F. A. McClintock
Keyword(s):  
Statistical Analysis ◽  
Shear Failure ◽  
Fatigue Cracks ◽  
Fatigue Tests ◽  
Tensile Failure ◽  
Bending Fatigue ◽  
Polycrystalline Iron

Abstract A statistical analysis is developed to show how a microscopic shear failure can result in the apparent tensile failure of polycrystalline iron in rotary bending fatigue tests.

Hybrid effect of carbon nanotube film and ultrathin carbon fiber prepreg composites

2016 ◽  
Vol 36 (6) ◽  
pp. 452-463 ◽  
Author(s):  
Jiao Pan ◽  
Min Li ◽  
Shaokai Wang ◽  
Yizhuo Gu ◽  
Qingwen Li ◽  
...  
Keyword(s):  
Carbon Nanotube ◽  
Carbon Fiber ◽  
Hybrid Composite ◽  
Hybrid Composites ◽  
Chemical Vapor ◽  
Interfacial Bonding ◽  
Damping Capacity ◽  
Failure Behavior ◽  
Hybrid Effect ◽  
Carbon Nanotube Film

This paper successfully interlaced floating catalyst chemical vapor deposition-grown carbon nanotube film and ultrathin carbon fiber prepreg to achieve strong and flexible carbon nanotube/carbon fiber hybrid composites with high carbon nanotube loading. Epoxidation was also introduced to improve interlaminar interfacial bonding. It was found that pristine carbon nanotube film/carbon fiber interply hybrid composite (carbon fiber/carbon nanotube/carbon fiber) showed sudden and brittle failure, while epoxidation caused a gradual failure behavior. Hybrid effect analysis suggested that the improved tensile performance and synergistic effect of epoxidized carbon nanotube film/carbon fiber hybrid composite were attributed to good load transfer and suppressed delamination induced by improved interfacial bonding. In addition carbon fiber/carbon nanotube/carbon fiber manifested excellent damping capacity with the maximum loss factor of 0.13. The in-plane electrical conductivity of composite with global carbon nanotube content of 21 wt% increased to the same order of magnitude as carbon nanotube film composite. The excellent mechanical, damping, and electrical properties demonstrated great potential for both structural and multifunctional applications of the resultant hybrid composites.

scholarly journals Microleakage of Seven Adhesive Systems in Enamel and Dentin

2006 ◽  
Vol 7 (5) ◽  
pp. 26-33 ◽  
Author(s):  
Fabrício Aulo Ogliari ◽  
Evandro Piva ◽  
Flávio Fernando Demarco ◽  
Camila Silveira de Araújo ◽  
Thiago Incerti da Silva ◽  
...  
Keyword(s):  
Statistical Analysis ◽  
Thermal Cycling ◽  
Hybrid Composite ◽  
Adhesive System ◽  
Single Bond ◽  
Adhesive Systems ◽  
Ranking Data ◽  
Class V ◽  
Light Curing ◽  
One Step

Abstract Aim The aim of this study was to evaluate the microleakage of seven adhesive systems on two substrates (enamel and dentin). Methods and Materials Class V cavities were performed in buccal and lingual surfaces of 56 bovine incisors. The cervical margin was located in dentin and the incisal margin in enamel. The specimens were randomly divided into seven groups (n=16), according to the adhesive system employed: Single Bond; Excite; One Step Plus; Gluma One Bond; Magic Bond; One Up Bond F; and One Coat Bond. The cavities were incrementally filled with a hybrid composite Filtek Z250 and polymerized with a XL 3000 light curing unit. After polishing, the specimens were submitted to thermal cycling followed by dye immersion. Leakage was evaluated under magnification (40X) based on a standard ranking. Data were subjected to statistical analysis (Kruskal-Wallis). Results Enamel margins exhibited lower leakage than dentin margins (p<0.01). The majority of the specimens were leakage-free and materials performed similarly. Conversely, in dentin most of the specimens exhibited the highest leakage degree and significant differences among materials (p<0.05) were found, with Excite exhibiting the lowest leakage degree. It was concluded enamel provided better sealing and the adhesive system was a significant factor only in dentin. Citation Silveira de Araújo C, Incerti da Silva T, Ogliari FA, Meireles SS, Piva E, Demarco FF. Microleakage of Seven Adhesive Systems in Enamel and Dentin. J Contemp Dent Pract 2006 November;(7)5:026-033.

scholarly journals Tensile Properties of Woven Carbon/Kevlar Reinforced Epoxy Hybrid Composite

2017 ◽  
Vol 890 ◽  
pp. 20-23 ◽  
Author(s):  
Nurain Hashim ◽  
Dayang Laila Abdul Majid ◽  
Rizal Zahari ◽  
Noorfaizal Yidris
Keyword(s):  
Composite Material ◽  
Hybrid Composite ◽  
Impact Resistance ◽  
High Strength ◽  
Tensile Behaviour ◽  
Carbon Fibres ◽  
Fibre Direction ◽  
Hybrid Effect ◽  
Hybrid Composite Material ◽  
Selection Of

Carbon fibres and Kevlar fibres are among the commonly used fibres in the composite industry. As carbon fibres usually known for its superior strength, its low impact resistance limited its application in the industry. However, further research found that combining the high strength fibres with more ductile fibres like Kevlar could improve the material’s impact resistance. This hybrid effect was also found to be most effective by using intra-ply woven hybrid fibres in the composite. In this work, hybrid composite material was fabricated by using woven carbon-Kevlar cloths with epoxy matrix and the mechanical properties are determined at 0 ̊, 45 ̊ and 90 ̊. The hybrid composite material was found to have highest tensile strength at 0 ̊ (carbon) direction. As the material’s strength and tensile behaviour are different at every fibre types, the selection of fibre direction of the woven cloth in loading is an important criteria in any applications.

Hybrid Effect on Hybrid Composite Reinforced Carbon Fibers and Flax Fibers

2019 ◽  
Vol 801 ◽  
pp. 101-106
Author(s):  
Anh Vu Nguyen ◽  
Karine Charlet ◽  
Belhassen Chedli Bouzgarrou ◽  
Ky Nam Pham ◽  
Trong Dai Vu ◽  
...  
Keyword(s):  
Carbon Fibers ◽  
Hybrid Composite ◽  
Hybrid Composites ◽  
Experimental Tests ◽  
Experimental Results ◽  
Woven Composites ◽  
Hybrid Effect ◽  
Flax Fibers ◽  
Homogenization Model ◽  
Good Agreement

In this paper, hybrid composite made of carbon woven fibers and flax woven fibers is studied. This hybrid composite structure takes advantages of high resistance, high stiffness of carbon fibers and high damping and low density of flax fibers. Different structures of flax woven composites, carbon woven composites and hybrid composites were fabricated and tested experimentally. With aim of predicting the properties of the hybrid composite, a homogenization model of the composite is established. The homogenization model is based on the rule-of-mixture and iso-strain assumption. The results of the analytical homogenization model (AHM) are then compared with the results of experimental tests. The results show a good agreement between the AHM and the experimental results at the homogenization level of the woven composite. However, at the hybrid composite homogenization level, the experimental results present considerably higher stiffness than analytical results that is explained by hybrid effect on the hybrid composite.

Mechanical performance of intraply and inter-intraply hybrid composites based on e-glass and polypropylene unidirectional fibers

2016 ◽  
Vol 51 (3) ◽  
pp. 381-394 ◽  
Author(s):  
MA Attia ◽  
MA Abd El-baky ◽  
AE Alshorbagy
Keyword(s):  
Mechanical Properties ◽  
Glass Fiber ◽  
Hybrid Composite ◽  
Mechanical Performance ◽  
Hybrid Composites ◽  
Stacking Sequence ◽  
Unidirectional Fibers ◽  
Interlaminar Shear ◽  
Hybrid Configuration ◽  
Intraply Hybrid Composite

The aims of this study are to design, fabricate and investigate the mechanical properties of new hybrid composite laminates made from polypropylene-glass unidirectional fibers and epoxy matrix. Specimens were fabricated following the hand lay-up technique in intraply and inter-intraply configurations. Results are presented regarding the tensile, flexural, in-plane shear and interlaminar shear behaviors of fabricated composites with particular consideration of the effects of the plies stacking sequence and hybrid configuration. The experimental results reveal that the mechanical properties of polypropylene/epoxy composite can be effectively improved by the incorporation of glass fiber through the formation of either intraply or inter-intraply hybrid composites. With a proper choice of the hybrid configuration and the plies stacking sequence, the fabricated hybrid composites achieved property profiles close to those of homogeneous glass reinforced laminate in terms of specific properties. Resistance of the intraply hybrid composite to tensile and flexural loadings is higher than inter-intraply hybrid composites. On the other hand, the highest in-plane and interlaminar shear strengths are associated with the inter-intraply hybrid composite with glass fiber core. Additionally, an analytical analysis was also introduced to provide a good correlation with the experimental data, which give an insight on the ideal plies stacking sequence to achieve the required properties.

Study on stress concentrations in an intraply hybrid composite sheet

2001 ◽  
Vol 22 (2) ◽  
pp. 154-159
Author(s):  
Zeng Qing-dun ◽  
Huang Xiao-qing ◽  
Lin Xue-hui
Keyword(s):  
Hybrid Composite ◽  
Composite Sheet ◽  
Stress Concentrations ◽  
Intraply Hybrid Composite

Experimentally Study on Mechanical Behavior of CF and GF Hybrid Fiber-Reinforced Plastics

2011 ◽  
Vol 332-334 ◽  
pp. 1082-1086
Author(s):  
Zhi Yun Wu ◽  
Rui Fang Ni
Keyword(s):  
Composite Materials ◽  
Carbon Fiber ◽  
Glass Fiber ◽  
Hybrid Composite ◽  
Tensile Behavior ◽  
Fiber Reinforced ◽  
Hybrid Fiber ◽  
Hybrid Effect ◽  
Reinforced Plastics ◽  
Fiber Reinforced Plastics

The multiaxial warp-knit fabrics of glass fiber or carbon fiber as the structure materials have widely applied to many industries. In this study, in order to combined the advantages of these two fibers, glass fiber and carbon fiber were employed as reinforcement materials in RIMR 135 epoxy resins, and hybrid composites were formed. The tensile behavior of hybrid fiber-reinforced plastics (HFRP) were compared with CFRP and GFRP on the longitudinal orientation . The results suggested that HFRP was high tensile strength and modulus of elasticity. Scanning electron microscopy was used to characterize the morphology of damaged surfaces. The micrographs revealed that CF and GF maintained their own tension behavior in the hybrid composite materials as well in the neat FRP materials. The hybrid effect of HFRP was investigated by the hybrid theory, which was compared to the experimental results. It was confirmed that the tensile behavior of the hybrid composite materials matched the plus hybrid effect.

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