Enhancement of interlaminar fracture toughness in textile-reinforced epoxy composites with polyamide 6/graphene oxide interlaminar toughening tackifier

2020 ◽  
Vol 191 ◽  
pp. 108094 ◽  
Author(s):  
Xiaoran Zhao ◽  
Wen Chen ◽  
Xiao Han ◽  
Yan Zhao ◽  
Shanyi Du
Keyword(s):  
Fracture Toughness ◽  
Graphene Oxide ◽  
Polyamide 6 ◽  
Epoxy Composites ◽  
Interlaminar Fracture Toughness ◽  
Interlaminar Fracture

Effect of graphene oxide on the interlaminar fracture toughness of carbon fiber/epoxy composites

2019 ◽  
Vol 59 (6) ◽  
pp. 1199-1208 ◽  
Author(s):  
Kunal Mishra ◽  
Krishna P. Bastola ◽  
Raman P. Singh ◽  
Ranji Vaidyanathan
Keyword(s):  
Fracture Toughness ◽  
Graphene Oxide ◽  
Carbon Fiber ◽  
Epoxy Composites ◽  
Interlaminar Fracture Toughness ◽  
Interlaminar Fracture ◽  
Carbon Fiber Epoxy

scholarly journals Mixed-Mode Interlaminar Fracture Toughness of Glass and Carbon Fibre Powder Epoxy Composites—For Design of Wind and Tidal Turbine Blades

Materials ◽  
2021 ◽  
Vol 14 (9) ◽  
pp. 2103
Author(s):  
Christophe Floreani ◽  
Colin Robert ◽  
Parvez Alam ◽  
Peter Davies ◽  
Conchúr M. Ó. Brádaigh
Keyword(s):  
Fracture Toughness ◽  
Carbon Fibre ◽  
Composite Structures ◽  
Mixed Mode ◽  
Epoxy Composites ◽  
Mode I ◽  
Mode Ii ◽  
Pure Mode ◽  
Interlaminar Fracture Toughness ◽  
Interlaminar Fracture

Powder epoxy composites have several advantages for the processing of large composite structures, including low exotherm, viscosity and material cost, as well as the ability to carry out separate melting and curing operations. This work studies the mode I and mixed-mode toughness, as well as the in-plane mechanical properties of unidirectional stitched glass and carbon fibre reinforced powder epoxy composites. The interlaminar fracture toughness is studied in pure mode I by performing Double Cantilever Beam tests and at 25% mode II, 50% mode II and 75% mode II by performing Mixed Mode Bending testing according to the ASTM D5528-13 test standard. The tensile and compressive properties are comparable to that of standard epoxy composites but both the mode I and mixed-mode toughness are shown to be significantly higher than that of other epoxy composites, even when comparing to toughened epoxies. The mixed-mode critical strain energy release rate as a function of the delamination mode ratio is also provided. This paper highlights the potential for powder epoxy composites in the manufacturing of structures where there is a risk of delamination.

scholarly journals Effect of sewage sludge ash filler on mode I and mode II interlaminar fracture toughness of S-glass/epoxy composites

2018 ◽  
Vol 1 (2) ◽  
Author(s):  
Mohamad Alsaadi 1,2 ◽  
Ahmet Erkliğ 2
Keyword(s):  
Fracture Toughness ◽  
Sewage Sludge ◽  
Epoxy Composites ◽  
Mode I ◽  
Mode Ii ◽  
Interlaminar Fracture Toughness ◽  
Sewage Sludge Ash ◽  
Interlaminar Fracture ◽  
Glass Fiber Reinforced ◽  
Sludge Ash

In this study, the influence of sewage sludge ash (SSA) waste particle contents on the mechanical properties and interlaminar fracture toughness for mode I and mode II delamination of S-glass fiber reinforced epoxy composites were investigated. Composite laminate specimens for tensile, flexural double-cantilever beam (DCB) and end-notched flexure (ENF) tests were prepared and tested according to ASTM standards with 5, 10, 15 and 20 wt% SSA filled S-glass/epoxy composites. Properties improvement reasons was explained based on optical and scanning electron microscopy. The highest improvement in tensile and flexural strength was obtained with 10 wt% content of SSA. The highest mode I and mode II interlaminar fracture toughness’s were obtained with 15 wt% content of SSA. The mode I and mode II interlaminar fracture toughness’s improved by 33 and 63.6%, respectively, compared to the composite without SSA.

Impact of process induced residual stresses on interlaminar fracture toughness in carbon epoxy composites

2019 ◽  
Vol 127 ◽  
pp. 105652
Author(s):  
M.A. Umarfarooq ◽  
P.S. Shivakumar Gouda ◽  
G.B. Veeresh kumar ◽  
N.R. Banapurmath ◽  
Abhilash Edacherian
Keyword(s):  
Fracture Toughness ◽  
Residual Stresses ◽  
Epoxy Composites ◽  
Interlaminar Fracture Toughness ◽  
Interlaminar Fracture
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