scholarly journals The influence of water on tensile and fatigue properties of two types of aramid/epoxy composites.

1987 ◽  
Vol 36 (411) ◽  
pp. 1395-1401 ◽  
Author(s):  
Kenjiro KOMAI ◽  
Sohei SHIROSHITA ◽  
Michiel V. BRUSCHKE
Keyword(s):  
Epoxy Composites ◽  
Fatigue Properties ◽  
Influence Of Water

Influence of water vapour on the creep and fatigue properties of TiAl

2002 ◽  
Vol 10 (1) ◽  
pp. 33-57 ◽  
Author(s):  
A Zeller ◽  
F Dettenwanger ◽  
M Schütze
Keyword(s):  
Water Vapour ◽  
Fatigue Properties ◽  
Influence Of Water

Long term hydrothermal effect on the mechanical and thermo-mechanical properties of carbon nanofiber doped epoxy composites

2018 ◽  
Vol 38 (3) ◽  
pp. 251-261 ◽  
Author(s):  
Sunirmal Saha ◽  
Smrutisikha Bal
Keyword(s):  
Water Absorption ◽  
Epoxy Polymer ◽  
Carbon Nanofiber ◽  
Flexural Modulus ◽  
Epoxy Composites ◽  
After Effects ◽  
Micro Cracks ◽  
Influence Of Water ◽  
Carbon Nanofibre ◽  
Experimental Findings

AbstractThe influence of water absorption on the mechanical and thermo-mechanical behaviour of carbon nanofibre (CNF) doped epoxy composites was investigated. When immersed in seawater for a long interval of 6 months, all the composite specimens endured saturation whilst weight change of composites was periodically monitored after removal of travelling specimens from a water-beaker. The equilibrium water content and the diffusion coefficient of all composites were evaluated with the help of Fick’s law of diffusion. The results demonstrated a general reduction in flexural modulus and strength, hardness, storage modulus and glass transition temperature (Tg) for seawater exposed specimens due to absorption of seawater as compared to their unexposed specimens. After-effects of water absorption such as plasticisation, swelling of epoxy polymer, interfacial damages and micro-cracks, were marked as the main reasons behind the deterioration of properties. However, among all, the least degradation in properties was observed in the nanocomposite with 0.75 wt.% CNFs loading. Such trivial degradation in properties is due to formation of strong interface of CNFs with the epoxy polymer. The experimental findings were further confirmed by the microstructures of fractured specimens using field emission scanning electron microscopy.

scholarly journals Effect of toughened polyamide/carbon fiber interlace braid fabric on the mechanical performance of CFRP laminates

2020 ◽  
Vol 29 ◽  
pp. 096369352090616
Author(s):  
Jong Hyun Eun ◽  
Dong Hyun Kim ◽  
Joon Seok Lee ◽  
Jin Sung Chon
Keyword(s):  
Carbon Fiber ◽  
Brittle Fracture ◽  
Epoxy Matrix ◽  
Composite Laminates ◽  
Mechanical Performance ◽  
Epoxy Composite ◽  
Epoxy Composites ◽  
Fatigue Properties ◽  
Matrix Resin ◽  
The Matrix

Delamination resistance and epoxy matrix brittle fracture have been the main issues in carbon/epoxy composites laminates. Various studies have been reported to complement the brittle fracture of epoxy matrix. Conventional methods of fabricating toughened carbon/epoxy composite laminates were thermo-plastic veils and films interleaving methods, directly toughening the matrix resin and dispersing nanoparticles in the matrix. In this study, the carbon/epoxy composites laminates were manufactured using carbon fiber/polyamide fiber braided fabrics. The chemical interactions between polyamide and epoxy matrix resin were investigated by Fourier transform infrared spectroscopy, which resulted in ring opening of the epoxide group by the amide group. The compression after impact strength and the interlaminar toughness of the carbon/epoxy composite laminate were increased by 31%, and the strain energy release rates were increased by 120% compared to the virgin interface composite. In the case of carbon/epoxy composite laminates interlaced with polyamide fibers, the mechanical properties, such as the tensile strength and fatigue properties, were improved as tensile modulus decreased.

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