Temperature-dependent thermal expansion behaviors of carbon fiber/epoxy plain woven composites: Experimental and numerical studies

2017 ◽  
Vol 176 ◽  
pp. 329-341 ◽  
Author(s):  
Kai Dong ◽  
Xiao Peng ◽  
Jiajin Zhang ◽  
Bohong Gu ◽  
Baozhong Sun
Keyword(s):  
Thermal Expansion ◽  
Carbon Fiber ◽  
Woven Composites ◽  
Temperature Dependent ◽  
Numerical Studies ◽  
Carbon Fiber Epoxy

Experimental study of the anisotropic thermal conductivity of 2D carbon-fiber/epoxy woven composites

2021 ◽  
Vol 267 ◽  
pp. 113870
Author(s):  
Hu Zhang ◽  
Kefan Wu ◽  
Guangming Xiao ◽  
Yanxia Du ◽  
Guihua Tang
Keyword(s):  
Thermal Conductivity ◽  
Experimental Study ◽  
Carbon Fiber ◽  
Woven Composites ◽  
Anisotropic Thermal Conductivity ◽  
Carbon Fiber Epoxy

An evaluation of elastic properties and coefficients of thermal expansion of graphite fibres from macroscopic composite input data

2005 ◽  
Vol 461 (2054) ◽  
pp. 347-369 ◽  
Author(s):  
P. Rupnowski ◽  
M. Gentz ◽  
J. K. Sutter ◽  
M. Kumosa
Keyword(s):  
Thermal Expansion ◽  
Elastic Properties ◽  
Input Data ◽  
Matrix Material ◽  
Unidirectional Composite ◽  
Woven Composites ◽  
Woven Composite ◽  
Temperature Dependent ◽  
Fibre Properties ◽  
Representative Unit Cell

In this work, a methodology has been presented for the evaluation of stiffness properties and temperature–dependent coefficients of thermal expansion of continuous fibres from the macroscopic properties of either unidirectional or woven composites. The methodology was used to determine the stiffness and thermal properties of T650–35 graphite fibres from the macroscopic input data of unidirectional and woven composites based on the same fibres embedded in a PMR–15 polyimide matrix. In the first part of the analysis, the fibre properties were determined directly from the unidirectional composite macro data using the inversed Eshelby–Mori–Tanaka approach. Subsequently, certain fibre properties were additionally evaluated indirectly from the woven composite, using the finite–element method and the concept of a representative unit cell. It has been shown that the temperature–dependent coefficients of thermal expansion of the fibres can be estimated from the unidirectional composite macro data with significantly smaller errors than in the case of the elastic properties. It has also been shown that the errors in the evaluation of the elastic properties of the fibres from the macro unidirectional composite data could be significantly reduced if the fibres were placed in a stiff matrix material: much stiffer than the polyimide resin. The longitudinal and transverse coefficients of thermal expansions and the shear modulus of the T650–35 fibres determined from the unidirectional composite analysis were successfully verified by investigating the woven composite.

Thermal properties of autoclave and out-of-autoclave carbon fiber-epoxy composites with different fiber weave configurations

2018 ◽  
Vol 52 (29) ◽  
pp. 4075-4085 ◽  
Author(s):  
Ronald Joven ◽  
Bob Minaie
Keyword(s):  
Thermal Expansion ◽  
Thermal Properties ◽  
Carbon Fiber ◽  
Specific Heat ◽  
Volume Fraction ◽  
Light Flash ◽  
Epoxy Composites ◽  
Fiber Volume ◽  
Out Of Autoclave ◽  
Carbon Fiber Epoxy

Thermal expansion, specific heat, diffusivity, and conductivity of carbon fiber-epoxy composites were studied using autoclave and out-of-autoclave prepregs with three different fabric weaves including unidirectional, eight-harness satin, and plain weave. For this purpose, light flash analysis was utilized where the implications of using anisotropic materials were studied. Results indicated that density, thermal expansion, conductivity, and diffusivity were strongly influenced by the fiber configuration of the sample. This phenomenon was attributed to the difference in fiber volume fraction induced by the different weaves of the fabric. Nevertheless, specific heat was similar for all the samples regardless of fabric type or resin formulation. Finally, thermal properties of tetrafluoroethylene release film were presented to analyze the tool-part heat transfer during manufacturing. This release film showed thermal conductivity three times lower than carbon fiber-epoxy samples indicating that the film could be an important contributor to thermal lag between tool and part.

IMPROVEMENT OF MECHANICAL AND THERMAL PROPERTIES OF CFRP LAMINATES USING MICRO-FIBRILLATED CELLULOSE

2012 ◽  
Vol 06 ◽  
pp. 622-627 ◽  
Author(s):  
HYOJIN KIM ◽  
TADASHI SUZUKI ◽  
KENICHI TAKEMURA
Keyword(s):  
Thermal Expansion ◽  
Glass Transition ◽  
Thermal Properties ◽  
Carbon Fiber ◽  
Coefficient Of Thermal Expansion ◽  
Flexural Modulus ◽  
Mechanical And Thermal Properties ◽  
Flexural Test ◽  
Cfrp Laminates ◽  
Carbon Fiber Epoxy

The aim of this study is improvement of mechanical and thermal properties of plain woven carbon fiber (CF) reinforced epoxy with addition of MFC as the additive. Carbon fiber/epoxy laminates with addition 0.3, 0.5, 0.7 and 1wt% of MFC were characterized by flexural test, DSC and TMA. The result represented that the flexural strength improved slightly at 0.3 and 0.5 wt% of MFC, but flexural modulus was not changed, respectively. The glass transition temperature of MFC-CFRP laminates showed the increase according to increase of MFC addition at 0.7 and 1.0 wt%. The coefficient of thermal expansion was decrease by 0.7 wt% of MFC addition.

scholarly journals Improved impact response of hygrothermally conditioned carbon/epoxy woven composites

2016 ◽  
Vol 23 (6) ◽  
pp. 699-710 ◽  
Author(s):  
Yucheng Zhong ◽  
Sunil Chandrakant Joshi
Keyword(s):  
Carbon Fiber ◽  
Impact Resistance ◽  
Impact Testing ◽  
Low Velocity Impact ◽  
Elastic Response ◽  
Woven Composites ◽  
Low Velocity ◽  
Hygrothermal Conditioning ◽  
The Impact ◽  
Carbon Fiber Epoxy

AbstractThe effects of hygrothermal conditioning and moisture on the impact resistance of carbon fiber/epoxy composite laminates were investigated. Specimens were fabricated from carbon fiber/epoxy woven prepreg materials. The fabricated specimens were either immersed in water at 80°C or subjected to hot/wet (at 80°C in water for 12 h) to cold/dry (at -30°C in a freezer for 12 h) cyclic hygrothermal conditions, which resulted in different moisture contents inside the laminates. It was found that the absorbed moisture did not migrate out from composite materials at -30°C. Neither of the hygrothermal conditions in this study had detrimental effects on the microstructure of the laminates. Low-velocity impact testing was subsequently conducted on the conditioned specimens. When attacked by the same level of impact energy, laminates with different moisture levels experienced different levels of impact damage. Moisture significantly alleviated the extent of damage in carbon fiber/epoxy woven laminates. The elastic response of the laminate under impact was improved after hygrothermal conditioning. The mechanism behind the improved impact resistance after absorbing moisture was proposed and deliberated.

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