scholarly journals Specific Heat and Thermal Expansion Coefficient of Hybrid Epoxy Composites

2020 ◽  
Vol 57 (3) ◽  
pp. 61-69
Author(s):  
Georgel Mihu ◽  
Vasile Bria ◽  
Adrian Circiumaru ◽  
Iulian Gabriel Birsan ◽  
Marina Bunea
Keyword(s):  
Thermal Expansion ◽  
Carbon Black ◽  
Specific Heat ◽  
Thermal Expansion Coefficient ◽  
Expansion Coefficient ◽  
Hybrid Composites ◽  
Epoxy Composites ◽  
Linear Expansion Coefficient ◽  
Thermal Linear Expansion Coefficient ◽  
Ply Orientation

Thermal behavior of hybrid epoxy composites reinforced with different types of plain weave fabrics and ply orientation at various angles was investigated in this research. It was analyzed their thermal linear expansion coefficient and specific heat measured with Thermomechanical Analyzer (TMA) and Differential Scanning Calorimeter (DSC) respectively. Also, in this paper was studied the influence of carbon black - aramid powder and carbon black - barium ferrite mixtures added into epoxy matrix between certain plies of the hybrid composites. The experimental results showed that the addition of filler mixtures led to a significant decreasing of thermal expansion coefficient and specific heat of the hybrid epoxy composite with carbon outer plies. It was recorded a good structural stability in case of hybrid carbon-glass composite in the temperature range of 40-60�C.

Investigation of the Thermodynamic Properties of Anharmonic Crystals with Defects and Influence of Anharmonicity in Exafs by the Moment Method

1998 ◽  
Vol 12 (02) ◽  
pp. 191-205 ◽  
Author(s):  
Vu Van Hung ◽  
Nguyen Thanh Hai
Keyword(s):  
Thermal Expansion ◽  
Thermodynamic Properties ◽  
Phase Change ◽  
Specific Heat ◽  
Thermal Expansion Coefficient ◽  
Expansion Coefficient ◽  
Moment Method ◽  
Adiabatic Compressibility ◽  
Relative Displacement ◽  
The Moment

By the moment method established previously on the basis of the statistical mechanics, the thermodynamic properties of a strongly anharmonic face-centered and body-centered cubic crystal with point defect are considered. The thermal expansion coefficient, the specific heat Cv and Cp, the isothermal and adiabatic compressibility, etc. are calculated. Our calculated results of the thermal expansion coefficient, the specific heat Cv and Cp… of W, Nb, Au and Ag metals at various temperatures agrees well with the measured values. The anharmonic effects in extended X-ray absorption fine structure (EXAFS) in the single-shell model are considered. We have obtained a new formula for anharmonic contribution to the mean square relative displacement. The anharmonicity is proportional to the temperature and enters the phase change of EXAFS. Our calculated results of Debye–Waller factor and phase change in EXAFS of Cu at various temperatures agrees well with the measured values.

Specific Heat and Thermal Expansion Coefficient of Al

1985 ◽  
Vol 130 (1) ◽  
pp. K11-K14 ◽  
Author(s):  
T. Soma ◽  
S. Nehashi ◽  
H.-Matsuo Kagaya
Keyword(s):  
Thermal Expansion ◽  
Specific Heat ◽  
Thermal Expansion Coefficient ◽  
Expansion Coefficient

scholarly journals Quantum elasticity of graphene: Thermal expansion coefficient and specific heat

2016 ◽  
Vol 94 (19) ◽  
Author(s):  
I. S. Burmistrov ◽  
I. V. Gornyi ◽  
V. Yu. Kachorovskii ◽  
M. I. Katsnelson ◽  
A. D. Mirlin
Keyword(s):  
Thermal Expansion ◽  
Specific Heat ◽  
Thermal Expansion Coefficient ◽  
Expansion Coefficient
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