ISSN 2288-2103 (Print)
ISSN 2288-2111 (Online)
 
 
 
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Abstract

Composites Research. 2019 32(1): 78-84
ⓒ The Journal of the Korean Society for Composite Materials
      
 
Long-Term Performance Prediction of Carbon Fiber Reinforced Composites Using Dynamic Mechanical Analyzer
Jae Ho Cha, Sung Ho Yoon
Department of Mechanical Engineering, Kumoh National University of Technology
 
 
동적기계분석장치를 이용한 탄소섬유/에폭시 복합재의 장기 성능 예측
차재호, 윤성호
Department of Mechanical Engineering, Kumoh National University of Technology
 

This study focused on the prediction of the long-term performance of carbon fiber/epoxy composites using Dynamic Mechanical Analysis (DMA) and Time-Temperature Superposition (TTS). Single-frequency test, multifrequency test, and creep TTS test were performed. A sinusoidal load of 20 μm amplitude was applied while increasing the temperature from -30oC to 240oC at 2oC/min for the single-frequency test and the multi-frequency test. The frequencies applied to the multi-frequency test were 0.316, 1, 3.16, 10 and 31.6 Hz. In the creep TTS test, a stress of 15 MPa was applied for 10 minutes at every 10oC from -30oC to 230oC. The glass transition temperature was determined by single-frequency test. The activation energy and the storage modulus curve for each temperature were obtained from glass transition temperature for each frequency by the multi-frequency test. The master curve for the reference temperature was obtained by applying the shift factor using the Arrhenius equation. Also, TTS test was used to obtain the creep compliance curves for each temperature and the master curve for the reference temperature by applying the shift factors using the manual shift technique. The master curve obtained through this process can be applied to predict the long-term performance of carbon fiber/epoxy composites for a given environmental condition.
 
Key words : Dynamic mechanical analyzer, Time-temperature superposition, Shift factor, Master curve, Carbon fiber/epoxy composite, Long-term performance
중심단어 : 동적기계분석장치, 시간-온도 중첩법, 이 동 인자, 마스터 선도, 탄소섬유/에폭시 복합재, 장기 성능
 
 
    
 
 
 

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