Determination of fibre/matrix interfacial shear strength by an acoustic emission technique

1991 ◽  
Vol 26 (24) ◽  
pp. 6631-6638 ◽  
Author(s):  
A. N. Netravali ◽  
Z. -F. Li ◽  
W. Sachse ◽  
H. F. Wu
Keyword(s):  
Acoustic Emission ◽  
Shear Strength ◽  
Interfacial Shear Strength ◽  
Interfacial Shear ◽  
Acoustic Emission Technique ◽  
Fibre Matrix

Influence of Unsizing and Carbon Nanotube Grafting of Carbon Fibre on Fibre Matrix Interfacial Shear Strength of Carbon Fibre and Polyamide 6

2019 ◽  
Vol 827 ◽  
pp. 178-183
Author(s):  
Kazuto Tanaka ◽  
Kanako Yamada ◽  
Yoshitake Hinoue ◽  
Tsutao Katayama
Keyword(s):  
Shear Strength ◽  
Carbon Fibre ◽  
Interfacial Shear Strength ◽  
Chemical Vapour ◽  
Polyamide 6 ◽  
Interfacial Shear ◽  
Morphological Observation ◽  
Production Cycle ◽  
Pull Out ◽  
Fibre Matrix

Carbon Fibre Reinforced Thermoplastics (CFRTP) are expected to be applied to the automotive industry instead of CFRP which require curing time, due to the expected short production cycle time of CFRTP, which is using thermoplastic as a matrix. We reported that the grafting of carbon nanotubes (CNTs) on the carbon fibre improves the fibre matrix interfacial shear strength. In our process to graft CNTs on carbon fibre, chemical vapour deposition (CVD) method was used and Ni, which was used as the catalyst, was electrically plated onto carbon fibres. Since commercially available carbon fibre was sized, which may affect the plating behaviour of Ni, the effects of sizing agents on CNT deposition have to be clarified. In this study, Ni for catalytic metal was plated by electrolytic plating using a watt bath on spread PAN-based carbon fibre and unsized carbon fibre, and the influence of the sizing agent to the distribution of Ni was evaluated. The morphological observation of carbon fibre and single fibre pull-out test were conducted to clarify the influence of sizing agent on the CNT deposition and the interfacial shear strength between the CNT grafted carbon fibre and Polyamide 6 (PA6). Uniform distribution of small sized Ni particles can be obtained on unsized carbon fibre and uniform Ni particles results in uniform CNT distribution. The CNT grafted unsized carbon fibre showed higher interfacial shear strength with PA6 than that of sized carbon fibre.

Effects of Temperature on the Fibre Matrix Interfacial Shear Strength of Carbon Nanotube Grafted Carbon Fibre Reinforced Heat Resistant Resin

2019 ◽  
Vol 827 ◽  
pp. 488-492
Author(s):  
Kazuto Tanaka ◽  
Daiki Kugimoto ◽  
Tsutao Katayama
Keyword(s):  
Mechanical Properties ◽  
Shear Strength ◽  
Carbon Fibre ◽  
Interfacial Shear Strength ◽  
Interfacial Shear ◽  
Pull Out ◽  
Significant Difference ◽  
Effects Of Temperature ◽  
Structural Parts ◽  
Fibre Matrix

Transportation sector is required to reduce CO2 emissions as environmental problems are becoming more serious. Carbon fibre reinforced thermoplastic (CFRTP) are expected to be applied to the structural parts of automobiles and aircrafts because of their superior mechanical properties such as high specific strength, high specific stiffness and high recyclability. One of the problems in using CFRTP for the structural parts is heat resistance, and it is necessary to clarify the mechanical properties under their service environmental temperature. The tensile strength of CFRTP at high temperatures decreases with temperature rise. The fibre matrix interfacial shear strength is reported to be improved by grafting of carbon nanotubes (CNTs) on the surface of carbon fibre. In this study, in order to clarify the effects of temperature on the fibre matrix interfacial shear strength of CNTs grafted carbon fibre reinforced PPS resin, single fibre pull-out test was conducted. While the interfacial shear strength of CNT grafted-CF/PPS is higher than that of As-received-CF/PPS at 25 °C, no significant difference was found in the interfacial shear strength of As-received-CF/PPS and CNT grafted-CF/PPS at 80 °C.

Interfacial studies of carbon fibre / polycarbonate composites using dynamic mechanical analysis

e-Polymers ◽  
2005 ◽  
Vol 5 (1) ◽  
Author(s):  
Maria C. Paiva ◽  
João F. Mano
Keyword(s):  
Shear Strength ◽  
Carbon Fibre ◽  
Dynamic Mechanical Analysis ◽  
Interfacial Shear Strength ◽  
Mechanical Analysis ◽  
Interfacial Shear ◽  
Carbon Fibres ◽  
Matrix Interaction ◽  
Fragmentation Test ◽  
Fibre Matrix

AbstractUnidirectional composite material samples with ultrahigh modulus carbon fibres, treated and untreated by oxygen plasma, and a polycarbonate matrix were prepared and tested. Dynamic mechanical analysis (DMA) was used to study interfacial fibre/matrix interaction and the fragmentation test method was applied to determine interfacial shear strength. For the composite samples with treated carbon fibres, analyzed by DMA, a consistent shift of the loss modulus peak toward higher temperature was observed. The damping ratio was highly affected by residual stresses along the carbon fibre direction due to the large difference of thermal expansion coefficients of matrix and fibres. Critical fibre length and interfacial shear strength, obtained from the fragmentation test, showed substantial improvement for treated fibres as compared to the untreated ones. Plasma oxidation of the fibre surface improved considerably the fibre-matrix interaction. Care must be taken interpreting the DMA results, due to specific characteristics of the system studied.

scholarly journals The Determination of Interfacial Shear Strength in Short Fiber Reinforced Poly Ethylene Terephthalate by Kelly-Tyson Theory

2017 ◽  
Vol 07 (04) ◽  
pp. 218-226
Author(s):  
Wiranphat Thodsaratpreeyakul ◽  
Putinun Uawongsuwan ◽  
Akio Kataoka ◽  
Takanori Negoro ◽  
Hiroyuki Hamada
Keyword(s):  
Shear Strength ◽  
Ethylene Terephthalate ◽  
Interfacial Shear Strength ◽  
Short Fiber ◽  
Interfacial Shear ◽  
Fiber Reinforced ◽  
Poly Ethylene Terephthalate ◽  
Poly Ethylene
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