Structural degradation and mechanical fracture of hybrid fabric reinforced composites

Batista, A.C.M.C.; Oliveira, J.F.S.; Aquino, Eve Maria Freire de

doi:10.1002/pen.24292

Cited by 15 publications

(12 citation statements)

References 14 publications

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“…Observing the results obtained, it is possible to highlight the low content of voids that happens due to the vacuum process utilized after the impregnation by hand lay-up. This low content of voids stands out when compared with present papers in literature, where is presented a value ranging approximately from 2 to 5% [5,30,31].…”

Section: Volumetric Density and Calcination Testsupporting

confidence: 60%

Polymeric composite reinforced by non‐crimp fabric: Effects of anisotropy and configuration on tensile and compressive behaviors

2018

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Glass fiber-reinforced plastics offer a wide range of application possibilities, especially regarding the use of new reinforcement configurations developed by the industry worldwide. Concerning these reinforcing materials, highlights are given to high performance fabrics such as hybrid and non-crimp fabrics (NCFs). However, the study of the mechanical behavior of composite laminates based on this type of reinforcement finds itself difficult due to the effects of hybridization (different forms of coupled fabrics), as well as anisotropy (influence of the orientation of the fibers relative to the loading direction) present in these fabrics. In this sense, this work aims to develop a composite laminate reinforced by four layers of multiaxial E-glass fiber NCF using epoxy vinyl ester resin commercially named Derakane Momentum 411-350 as matrix. The main objective is to analyze its strength and stiffness from the perspective of the effects of loading type (tensile and compressive tests), laminate configuration (stacking sequence), and anisotropy (orientation of the fibers/loading direction). Comparative studies were developed, in addition to macroscopic characterization of the mechanical fracture according to ASTM standards. The results showed that the laminate configuration have different influences, depending on the loading type (tensile or compressive loading). In terms of anisotropy, the test specimens aligned at AE45 presented a great reduction in the mechanical properties, both in tensile and compressive loading. Also, in comparison with the literature, it is observed that the LNCF laminate presented similar or higher mechanical behavior, validating the results obtained in this work.

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Section: Volumetric Density and Calcination Testsupporting

confidence: 60%

Polymeric composite reinforced by non‐crimp fabric: Effects of anisotropy and configuration on tensile and compressive behaviors

2018

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“…Table 3 it is possible to observe the synthesis of the results of the mechanical properties (average values) determined at the three-point bending test as well as the values of the respective standard deviations. Batista et al 16 obtained to the hybrid fabric with glass/ Kevlar in the three-point bending test the values: (143.1 ± 7.9) MPa for flexural strength and (7.5 ±0.6) GPa for flexural modulus.…”

Section: Mechanical Properties -Uniaxial Tensilementioning

confidence: 99%

“…Batista et al 16 studied a hybrid composite with o plain bidirectional hybrid fabric, composed of E-glass fiber and Kevlar/49 and as reinforcement and use epoxy vinyl ester thermosetting resin as matrix (Derakane 470-300) and in the uniaxial tensile test was obtained: (106.4±5.8) MPa for tensile strength and (3.9±0.3) GPa for elastic modulus.…”

Section: Mechanical Properties -Uniaxial Tensilementioning

confidence: 99%

Polymer Composites Reinforced with Hybrid Fiber Fabrics

Felipe

Batista

et al. 2017

Mat. Res.

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In an effort to show the influence of the hybridization method in hybrid fabric reinforced composites within the characteristic of the fracture and the mechanical properties, two laminate reinforced with bi-directional woven were developed, where one of them was reinforced with a hybrid strand (hybrid strand composite laminate) and the other with a different strands (hybrid fabric composite laminate). Both laminates used polyester resin, Kevlar-49 and glass-E fibers, had four layers and were prepared industrially by hand lay-up manufacturing. The percentages by weight of fiberglass and Kevlar in each type of woven are equal. The hybrid strand composite laminate showed a higher tensile strength, however the hybrid fabric composite laminate showed superior properties in three-point bending test, for example, 41.7 % superiority in flexural strength. The results showed that the hybridization method in hybrid reinforced composites influences the mechanical behavior of laminates and the formation and spread of damage.

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“…Among these, polymer composite materials, also known as fiber-reinforced plastics (FRP) 1,2 , have a special highlight. Included in this category of composite materials there are the plastics reinforced with hybrid fabrics of high mechanical performance, ie, reinforcing fabrics made of synthetic fiber [3][4][5][6] .…”

Section: Introductionmentioning

confidence: 99%

Failure Theories on Carbon/Kevlar Hybrid Fabric Based Composite Laminate: Notch and Anisotropy Effects

2019

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Composite materials have been increasingly used in both researches and industries, given their wide range of innovative applications and configurations. High-performance hybrid fabric-reinforced plastics stand out in this sector. In the present research, an epoxy-based vinyl ester resin laminate reinforced with bidirectional hybrid fabric consisting of carbon and Kevlar fibers is developed. In order to determine its mechanical properties and damage mechanism considering the anisotropy and the presence of geometric discontinuity (circular hole), this research focused on both experimental and analytical aspect. Concerning to geometric discontinuity, in the vicinity of the hole (known as a stress concentration area), characteristic distances a o and d o associated to ASC (Average Stress Criterion) and PSC (Point Stress Criterion) failure theories, respectively, were determined. All the study of the composite material mechanical behavior was conducted based on uniaxial tensile tests. Their results show higher losses in the mechanical properties of the hybrid laminate, with respect to the anisotropy and the presence of the central hole, mainly when the orientation of the Kevlar fibers coincides with the direction of the applied load.

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Structural degradation and mechanical fracture of hybrid fabric reinforced composites

Cited by 15 publications

References 14 publications

Polymeric composite reinforced by non‐crimp fabric: Effects of anisotropy and configuration on tensile and compressive behaviors

Polymeric composite reinforced by non‐crimp fabric: Effects of anisotropy and configuration on tensile and compressive behaviors

Polymer Composites Reinforced with Hybrid Fiber Fabrics

Failure Theories on Carbon/Kevlar Hybrid Fabric Based Composite Laminate: Notch and Anisotropy Effects

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