Failure Analysis of Aramid Fiber Reinforced Aluminum Laminates with Surface and Through Thickness Fatigue Cracks

2009 ◽  
pp. 171-171-17
Author(s):  
Y Macheret ◽  
RJ Bucci ◽  
GE Nordmark ◽  
TR Kipp
Keyword(s):  
Failure Analysis ◽  
Fatigue Cracks ◽  
Aramid Fiber ◽  
Fiber Reinforced

Sulfone-functionalized poly(p-phenylene terephthalamide) copolymer fibers with improved interfacial adhesion to epoxy matrices

2021 ◽  
pp. 095400832110089
Author(s):  
Ting Li ◽  
Zengxiao Wang ◽  
Hao Zhang ◽  
Yutong Cao ◽  
Zuming Hu ◽  
...  
Keyword(s):  
Interfacial Adhesion ◽  
Interfacial Shear Strength ◽  
Aramid Fiber ◽  
Fiber Reinforced Composites ◽  
Epoxy Composites ◽  
Reinforced Composites ◽  
Fiber Reinforced ◽  
Regular Arrangement ◽  
Epoxy Matrices ◽  
Polymerization Conditions

The poor interfacial adhesion of aramid fiber and matrix limits the application of the final composites. In this study, a series of the sulfone-functionalized poly( p-phenylene terephthalamide) (SPPTA) copolymers were satisfactorily synthesized and the effects of polymerization conditions (contents of the additional monomer and the cosolvent LiCl, molar concentration and ratio of the monomer, reaction temperature and time) on the molecular weight of the copolymer were discussed. The introduction of the sulfone group in aromatic polyamides not only increased the polarity of poly( p-phenylene terephthalamide) (PPTA) but destroyed the regular arrangement of the molecular chains, which greatly improved the surface free energy and the solubility of the polymers in organic solvents. The polymer maintained excellent thermal and interfacial properties. Compared with the PPTA fiber/epoxy composites, the interfacial shear strength (IFSS) of SPPTA fiber-reinforced epoxy composites reached 43.5 MPa, with a significantly enhancement of 20.8%, implying that the study provided an effective method to achieve highly interfacial adhesion of aramid fiber-reinforced composites.

scholarly journals Modeling of Bridging Law for Bundled Aramid Fiber-Reinforced Cementitious Composite and its Adaptability in Crack Width Evaluation

Materials ◽  
2021 ◽  
Vol 14 (1) ◽  
pp. 179
Author(s):  
Daiki Sunaga ◽  
Takumi Koba ◽  
Toshiyuki Kanakubo
Keyword(s):  
Fiber Orientation ◽  
Crack Width ◽  
Volume Fraction ◽  
Characteristic Point ◽  
Crack Opening ◽  
Aramid Fiber ◽  
Cementitious Composite ◽  
Fiber Reinforced ◽  
Cross Sectional ◽  
Bridging Law

Tensile performance of fiber-reinforced cementitious composite (FRCC) after first cracking is characterized by fiber-bridging stress–crack width relationships called bridging law. The bridging law can be calculated by an integral calculus of forces carried by individual fibers, considering the fiber orientation. The objective of this study was to propose a simplified model of bridging law for bundled aramid fiber, considering fiber orientation for the practical use. By using the pullout characteristic of bundled aramid fiber obtained in the previous study, the bridging laws were calculated for various cases of fiber orientation. The calculated results were expressed by a bilinear model, and each characteristic point is expressed by the function of fiber-orientation intensity. After that, uniaxial tension tests of steel reinforced aramid-FRCC prism specimens were conducted to obtain the crack-opening behavior and confirm the adaptability of the modeled bridging laws in crack-width evaluation. The experimental parameters are cross-sectional dimensions of specimens and volume fraction of fiber. The test results are compared with the theoretical curves calculated by using the modeled bridging law and show good agreements in each parameter.

Axial compressive performance of laminated bamboo column with aramid fiber reinforced polymer

2021 ◽  
Vol 258 ◽  
pp. 113398
Author(s):  
Zhen Wang ◽  
Haitao Li ◽  
Benhua Fei ◽  
Mahmud Ashraf ◽  
Zhenhua Xiong ◽  
...  
Keyword(s):  
Aramid Fiber ◽  
Fiber Reinforced Polymer ◽  
Fiber Reinforced ◽  
Reinforced Polymer ◽  
Laminated Bamboo ◽  
Compressive Performance

scholarly journals Characterization on microstructure of interface and failure analysis of SiC fiber reinforced Ti-17 composites under tension load

2021 ◽  
Vol 772 (1) ◽  
pp. 012061
Author(s):  
Wenxia Zhao ◽  
Octav. Ciuca ◽  
Xiaoguang Yang ◽  
Chunhu Tao ◽  
Xiaorong Zhou ◽  
...  
Keyword(s):  
Failure Analysis ◽  
Fiber Reinforced ◽  
Sic Fiber ◽  
Tension Load

The effect of halloysite nanotube modification on wear behavior of carbon‐aramid fiber reinforced hybrid nanocomposites

2021 ◽  
Author(s):  
Mehmet Emin Çetin ◽  
Yusuf Baştosun ◽  
Ahmet Caner Tatar ◽  
M. Huseyin CETIN ◽  
Okan Demir ◽  
...  
Keyword(s):  
Wear Behavior ◽  
Aramid Fiber ◽  
Hybrid Nanocomposites ◽  
Fiber Reinforced ◽  
Halloysite Nanotube
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