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Evaluation of dynamic modulus measurement for C/C‐SiC composites at different temperatures
Author(s) -
Hönig Sandrine,
Koch Dietmar,
Weber Steffen,
Etzold Simon,
Tonnesen Thorsten,
Telle Rainer,
Traon Nicolas
Publication year - 2019
Publication title -
international journal of applied ceramic technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.4
H-Index - 57
eISSN - 1744-7402
pISSN - 1546-542X
DOI - 10.1111/ijac.13293
Subject(s) - materials science , composite material , flexural strength , bending , flexural modulus , ceramic , orthotropic material , modulus , composite number , elastic modulus , three point flexural test , structural engineering , finite element method , engineering
The determination of elastic properties at application temperature is fundamental for the design of fibre reinforced ceramic composite components. An attractive method to characterize the flexural modulus at room and high temperature under specific atmosphere is the nondestructive Resonant Frequency Damping Analysis (RFDA). The objective of this paper was to evaluate and validate the modulus measurement via RFDA for orthotropic C/C‐SiC composites at the application temperature. At room temperature flexural moduli of C/C‐SiC with 0/90° reinforcement were measured under quasi‐static 4‐point bending loads and compared with dynamic moduli measured via RFDA longitudinally to fibre direction. The dynamic modulus of C/C‐SiC was then measured via RFDA up to 1250°C under flowing inert gas and showed an increase with temperature which fitted with literature values. The measured fundamental frequencies were finally compared to those resulting from numerical modal analyses. Dynamic and quasi‐static flexural moduli are comparable and the numerical analyses proved that bending modes are correctly modeled by means of dynamic modulus measured via RFDA. The nondestructive RFDA as well as the numerical modeling approach are suitable for evaluation of C/C‐SiC and may be transferred to other fibre reinforced ceramic composite materials.