TY - JOUR
T1 - Elastic-stiffness coefficients of a silicon carbide fibre at elevated temperatures
T2 - Acoustic spectroscopy and micromechanics modelling
AU - Ogi, H.
AU - Kai, S.
AU - Ichitsubo, T.
AU - Hirao, M.
AU - Takashima, K.
PY - 2003/2/1
Y1 - 2003/2/1
N2 - We have determined all five independent elastic-stiffness coefficients Cij of a silicon carbide fibre with transverse isotropy from room temperature up to 873 K. Firstly, we measured the Cij of a titanium-alloy-matrix composite reinforced unidirectionally with the fibres and the matrix alloy alone. Electromagnetic acoustic resonance detected the free-vibration resonance frequencies of the specimens to determine their C ij. Secondly, we applied a micromechanics calculation to deduce the fibre Cij from the measured composite and matrix Cij. The resulting fibre Cij shows strong anisotropy in the temperature derivatives of the Cij; the temperature derivatives for the fibre-axis-direction Cij are much smaller than the others.
AB - We have determined all five independent elastic-stiffness coefficients Cij of a silicon carbide fibre with transverse isotropy from room temperature up to 873 K. Firstly, we measured the Cij of a titanium-alloy-matrix composite reinforced unidirectionally with the fibres and the matrix alloy alone. Electromagnetic acoustic resonance detected the free-vibration resonance frequencies of the specimens to determine their C ij. Secondly, we applied a micromechanics calculation to deduce the fibre Cij from the measured composite and matrix Cij. The resulting fibre Cij shows strong anisotropy in the temperature derivatives of the Cij; the temperature derivatives for the fibre-axis-direction Cij are much smaller than the others.
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U2 - 10.1080/0141861021000034559
DO - 10.1080/0141861021000034559
M3 - Article
AN - SCOPUS:0037808003
VL - 83
SP - 503
EP - 512
JO - Philosophical Magazine
JF - Philosophical Magazine
SN - 1478-6435
IS - 4
ER -