Mode I Fracture Toughness of Banana Fiber and Glass Fiber Reinforced Composites

2012 ◽  
Vol 622-623 ◽  
pp. 1320-1324
Author(s):  
V. Santhanam ◽  
M. Chandrasekaran ◽  
N. Venkateshwaran ◽  
A. Elayaperumal
Keyword(s):  
Fracture Toughness ◽  
Glass Fiber ◽  
Volume Fraction ◽  
Fiber Reinforced Polymers ◽  
Mode I ◽  
Fiber Reinforced ◽  
Banana Fiber ◽  
Mode I Fracture ◽  
Mode I Fracture Toughness ◽  
Glass Fiber Reinforced

Although fiber-reinforced polymers (FRP) have until now been largely applied to various fields of engineering, these materials have also been used in many technical applications, especially where high strength and stiffness are required, but with low component weight. Among various natural fibers, banana fiber is of particular interest in that its composites have high tensile strength, high tensile modulus, and low elongation at break beside its low cost and eases of availability. In this study, banana fiber and glass fiber reinforced polyester Resin composites were prepared using hand lay up technique . Experiments are conducted to compare and to find the effect of fiber volume fraction on mode I fracture toughness of both composites.

Effect of fiber content and fiber orientation on mechanical behavior of fused filament fabricated continuous-glass-fiber-reinforced nylon

2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Stephanie S. Luke ◽  
David Soares ◽  
Janaye V. Marshall ◽  
James Sheddden ◽  
Özgür Keleş
Keyword(s):  
Fracture Toughness ◽  
Fiber Orientation ◽  
Fiber Content ◽  
Mode I ◽  
Fiber Reinforced ◽  
Content Type ◽  
Mode I Fracture ◽  
Mode I Fracture Toughness ◽  
Continuous Glass Fiber ◽  
Glass Fiber Reinforced

Purpose Fused filament fabrication of continuous-fiber-reinforced polymers is a promising technique to achieve customized high-performance composites. However, the off-axis tensile strength (TS) and Mode I fracture toughness of fused filament fabricated (FFFed) continuous-glass-fiber-reinforced (CGFR) nylon are unknown. The purpose of this paper is to investigate the mechanical and fracture behavior of FFFed CGFR nylon with various fiber content and off-axis fiber alignment. Design/methodology/approach Tensile tests were performed on FFFed CGFR-nylon with 9.5, 18.9 and 28.4 fiber vol. %. TS was tested with fiber orientations between 0∘ and 90∘ at 15∘ intervals. Double cantilever beam tests were performed to reveal the Mode I fracture toughness of FFFed composites. Findings TS increased with increasing fiber vol. % from 122 MPa at 9.5 vol. % to 291 MPa at 28 vol. %. FFFed nylon with a triangular infill resulted in 37 vol. % porosity and a TS of 12 MPa. Composite samples had 11–12 vol. % porosity. TS decreased by 78% from 291 MPa to 64 MPa for a change in fiber angle θ from 0∘ (parallel to the tensile stress) to 15∘. TS was between 27 and 17 MPa for 300 < θ < 900. Mode I fracture toughness of all the composites were lower than ∼332 J/m2. Practical implications Practical applications of FFFed continuous-fiber-reinforced (CFR) nylon should be limited to designs where tensile stresses align within 15∘ of the fiber orientation. Interlayer fracture toughness of FFFed CFR composites should be confirmed for product designs that operate under Mode I loading. Originality/value To the best of the authors’ knowledge, this is the first study showing the effects of fiber orientation on the mechanical behavior and effects of the fiber content on the Mode I fracture toughness of FFFed CGFR nylon.

Mode I transverse intralaminar fracture in glass fiber-reinforced polymers with ductile matrices

2017 ◽  
Vol 165 ◽  
pp. 65-73 ◽  
Author(s):  
Davi M. Montenegro ◽  
Francesco Bernasconi ◽  
Markus Zogg ◽  
Matthias Gössi ◽  
Rafael Libanori ◽  
...  
Keyword(s):  
Glass Fiber ◽  
Fiber Reinforced Polymers ◽  
Mode I ◽  
Fiber Reinforced ◽  
Reinforced Polymers ◽  
Glass Fiber Reinforced Polymers ◽  
Glass Fiber Reinforced

scholarly journals Woven Glass Fiber Composites with Aligned Carbon Nanotube Sheet Interlayers

2016 ◽  
Vol 2016 ◽  
pp. 1-9 ◽  
Author(s):  
Hardik Bhanushali ◽  
Philip D. Bradford
Keyword(s):  
Fracture Toughness ◽  
Glass Fiber ◽  
Mode I ◽  
Mode Ii ◽  
Interlaminar Fracture Toughness ◽  
Fiber Reinforced ◽  
Interlaminar Fracture ◽  
Glass Fiber Reinforced ◽  
Short Beam ◽  
Woven Glass Fiber

This investigation describes the design, fabrication, and testing of woven glass fiber reinforced epoxy matrix laminates with aligned CNT sheets integrated between plies in order to improve the matrix dominated through thickness properties such as the interlaminar fracture toughness at ply interfaces. Using aligned CNT sheets allows for a concentration of millimeter long CNTs at the most likely point of laminate failure. Mode I and Mode II interlaminar fracture toughness of various CNT modified samples were investigated using double cantilever beam (DCB) and end notched flexure (ENF) experiments, respectively. Short beam strength (SBS) and in-plane tensile properties of the CNT modified samples were also investigated. Moderate improvement was observed in Mode I and Mode II fracture toughness at crack initiation when aligned CNT sheets with a basis weight of 0.354 g/m2were used to modify the ply interface. No compromise in the in-plane mechanical properties of the laminate was observed and very little improvement was observed in the shear related short beam strength of the CNT modified laminates as compared to the control samples. Integration of aligned CNT sheets into the composite laminate imparted in-plane and through thickness electrical properties into the nonconductive glass fiber reinforced epoxy composite laminates.

Mode I Fracture Toughness of Fiber Reinforced Composite-Wood Bonded Interface

1998 ◽  
Vol 32 (10) ◽  
pp. 987-1013 ◽  
Author(s):  
Julio F. Davalos ◽  
Pizhong Qiao ◽  
Prabhu Madabhusi-Raman ◽  
Elemer M. Lang
Keyword(s):  
Fracture Toughness ◽  
Mode I ◽  
Fiber Reinforced ◽  
Fiber Reinforced Composite ◽  
Mode I Fracture ◽  
Mode I Fracture Toughness ◽  
Reinforced Composite ◽  
Bonded Interface ◽  
Composite Wood

Mode I fracture toughness of fiber-reinforced polymer composites: A review

2019 ◽  
pp. 152808371985876 ◽  
Author(s):  
Amna Siddique ◽  
Sharjeel Abid ◽  
Faizan Shafiq ◽  
Yasir Nawab ◽  
Hailou Wang ◽  
...  
Keyword(s):  
Fracture Toughness ◽  
Limiting Factor ◽  
Mode I ◽  
Fiber Reinforced ◽  
Mode I Fracture ◽  
Mode I Fracture Toughness ◽  
Fiber Reinforced Polymer Composites ◽  
Recent Developments ◽  
Improve Fracture Toughness ◽  
Toughness Testing

Composite materials are known for their high stiffness and strength at lower weight as compared to conventional structural materials. Recently, there has been a growing interest in finding the new ways to decrease delamination failure, which is a life limiting factor of laminated composites. This review paper emphasizes on the effects of different reinforcement structures on mode I fracture toughness and possible ways to improve fracture toughness. A brief description on intrinsic and extrinsic mechanisms of crack growth has been discussed along with the earlier investigations and recent developments for mode I fracture toughness testing. Factors that affect the fracture toughness are also discussed. A brief knowledge of mode I fracture toughness of traditional and advanced fiber-reinforced composites is given, which could help researchers to understand fracture behaviors of composites and thus, it can help engineers to design composites with higher interlaminar strength.

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