The Experts below are selected from a list of 21 Experts worldwide ranked by ideXlab platform
P J Herrerafranco - One of the best experts on this subject based on the ideXlab platform.
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effect of moisture absorption on the mechanical behavior of carbon Fiber epoxy matrix composites
Journal of Materials Science, 2013Co-Authors: E Perezpacheco, J I Cauichcupul, A Valadezgonzalez, P J HerrerafrancoAbstract:A carbon Fiber/epoxy unidirectional laminated composite was exposed to a humid environment and the effect of moisture absorption on the mechanical properties and Failure Modes was investigated. The composites were exposed to three humidity conditions, namely, 25, 55, and 95 % at a constant temperature of 25 °C. The carbon Fiber–epoxy laminated composites for two different carbon Fiber surface treatments were used. The results showed that the mechanical properties differ considerably for each Fiber surface treatment. The application of a coupling agent enhanced the Fiber-matrix adhesion and reduced dependence of the properties on humidity. The damage mechanism observed at micromechanical level was correlated to acoustic emission signals from both laminated composites. The untreated carbon Fiber Failure Mode was attributed to Fiber-matrix interfacial Failure and for the silane-treated carbon Fiber reinforced epoxy laminate attributed to matrix yielding followed by Fiber Failure with no signs of Fiber-matrix interface Failure for moisture contents up to 1.89 %.
E Perezpacheco - One of the best experts on this subject based on the ideXlab platform.
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effect of moisture absorption on the mechanical behavior of carbon Fiber epoxy matrix composites
Journal of Materials Science, 2013Co-Authors: E Perezpacheco, J I Cauichcupul, A Valadezgonzalez, P J HerrerafrancoAbstract:A carbon Fiber/epoxy unidirectional laminated composite was exposed to a humid environment and the effect of moisture absorption on the mechanical properties and Failure Modes was investigated. The composites were exposed to three humidity conditions, namely, 25, 55, and 95 % at a constant temperature of 25 °C. The carbon Fiber–epoxy laminated composites for two different carbon Fiber surface treatments were used. The results showed that the mechanical properties differ considerably for each Fiber surface treatment. The application of a coupling agent enhanced the Fiber-matrix adhesion and reduced dependence of the properties on humidity. The damage mechanism observed at micromechanical level was correlated to acoustic emission signals from both laminated composites. The untreated carbon Fiber Failure Mode was attributed to Fiber-matrix interfacial Failure and for the silane-treated carbon Fiber reinforced epoxy laminate attributed to matrix yielding followed by Fiber Failure with no signs of Fiber-matrix interface Failure for moisture contents up to 1.89 %.
A Valadezgonzalez - One of the best experts on this subject based on the ideXlab platform.
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effect of moisture absorption on the mechanical behavior of carbon Fiber epoxy matrix composites
Journal of Materials Science, 2013Co-Authors: E Perezpacheco, J I Cauichcupul, A Valadezgonzalez, P J HerrerafrancoAbstract:A carbon Fiber/epoxy unidirectional laminated composite was exposed to a humid environment and the effect of moisture absorption on the mechanical properties and Failure Modes was investigated. The composites were exposed to three humidity conditions, namely, 25, 55, and 95 % at a constant temperature of 25 °C. The carbon Fiber–epoxy laminated composites for two different carbon Fiber surface treatments were used. The results showed that the mechanical properties differ considerably for each Fiber surface treatment. The application of a coupling agent enhanced the Fiber-matrix adhesion and reduced dependence of the properties on humidity. The damage mechanism observed at micromechanical level was correlated to acoustic emission signals from both laminated composites. The untreated carbon Fiber Failure Mode was attributed to Fiber-matrix interfacial Failure and for the silane-treated carbon Fiber reinforced epoxy laminate attributed to matrix yielding followed by Fiber Failure with no signs of Fiber-matrix interface Failure for moisture contents up to 1.89 %.
J I Cauichcupul - One of the best experts on this subject based on the ideXlab platform.
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effect of moisture absorption on the mechanical behavior of carbon Fiber epoxy matrix composites
Journal of Materials Science, 2013Co-Authors: E Perezpacheco, J I Cauichcupul, A Valadezgonzalez, P J HerrerafrancoAbstract:A carbon Fiber/epoxy unidirectional laminated composite was exposed to a humid environment and the effect of moisture absorption on the mechanical properties and Failure Modes was investigated. The composites were exposed to three humidity conditions, namely, 25, 55, and 95 % at a constant temperature of 25 °C. The carbon Fiber–epoxy laminated composites for two different carbon Fiber surface treatments were used. The results showed that the mechanical properties differ considerably for each Fiber surface treatment. The application of a coupling agent enhanced the Fiber-matrix adhesion and reduced dependence of the properties on humidity. The damage mechanism observed at micromechanical level was correlated to acoustic emission signals from both laminated composites. The untreated carbon Fiber Failure Mode was attributed to Fiber-matrix interfacial Failure and for the silane-treated carbon Fiber reinforced epoxy laminate attributed to matrix yielding followed by Fiber Failure with no signs of Fiber-matrix interface Failure for moisture contents up to 1.89 %.
T. V. Bhanu Prakash - One of the best experts on this subject based on the ideXlab platform.
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Characterisation of Fiber Failure Mode in T-700 carbon Fiber reinforced epoxy composites by acoustic emission testing
Russian Journal of Nondestructive Testing, 2014Co-Authors: M. Ramamanohara Babu, T. V. Bhanu PrakashAbstract:Acoustic emissions generated by a structure under stressed condition provide an insight in to the dynamic behaviour of flaws in the structure for characterization of Failure Modes. Fiber Failure mechanism in T-700 carbon epoxy composites is characterized by testing unidirectional specimens in longitudinal Mode. Acoustic emission parameters like amplitude, energy, duration, and signal strength have been recorded and studied with respect to the applied load to assess the Fiber Failure characteristics. The AE data is analyzed with different correlation plots for visual pattern recognition. Significant Fiber breakage is observed at above 70% of the load. Bi-linear trend of the cumulative amplitude distribution curve indicates distinctively matrix and Fiber Failures. Matrix cracking Failure mechanism dominated the entire loading cycle and is represented by AE hits of up to 85 to 90 dB amplitude and the peak amplitude distribution is 58 to 75 dB. The wave forms of matrix cracking hits with less than 90 dB and 100 units of energy are having up to 273 kHz frequency with a peak around 100 kHz. The wave forms of Fiber breakage hits with more than 90 dB and 100 units of energy have up to 448 kHz frequency and with a peak from 168 to 437 kHz. From the low amplitude filtering technique the border line for Fiber breakage is observed from 89 to 92 dB.