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Shimadzu Review 76[1・2] (2019.7)
Carbon fiber reinforced thermoplastic composites (CFRTP), which offer both high performance and high productivity, are expected to find application in the transportation equipment field and, to guarantee their performance, it is becoming more and more important to understand their impact and temperature characteristics. In this study, 3-point bending impact testing was performed at various strain-rate and temperature conditions in order to evaluate the strain-rate and temperature dependence of three kinds of CFRTP made from the same matrix resin and carbon fiber but with different types of reinforcement configuration. In addition, fracture observation using a high speed video camera and fractography were conducted. As a result of 3-point bending impact testing, it was confirmed that the flexural strength and flexural modulus in every CFRTP tend to show lower values at lower strain-rate and higher temperature and higher values at higher strain-rate and lower temperature. It was also confirmed that the facture starting point or the fracture surface state changed depending on test conditions. However, the changes in flexural properties as functions of strain-rate and temperature were different for each material, and the effect of the reinforcement configuration on strain-rate and temperature dependence was clarified.
Keywords: Impact test, CFRTP, Time and temperature dependence, Fracture observation
1Global Application Development Center, Analytical & Measuring Instruments Division, Shimadzu Corporation, Kyoto, Japan
2Advanced Moldings and Composites Laboratory, Aichi R&D Center, Mitsubishi Chemical Corporation
3Department of Systems Innovation, School of Engineering, The University of Tokyo
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