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Hayashi, A.
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article
Dynamic behaviour in mode I fracture toughness of CFRP as a function of temperature
Abstract
The aim of this work is to assess the influence of high strain rates and testing temperature on the fracture energy in mode I, G(IC), of carbon fibre reinforced plastic (CFRP) plates. Double cantilever beam (DCB) specimens were tested to determine G(IC) as a function of temperature (24 and 80 degrees C) under an impact load of 4.7 m/s (using a falling-wedge impact test machine), with the results being compared with the values previously determined by the authors under quasi-static loads. This work has demonstrated a significant influence of the testing temperature on the G(IC) of composite materials, as this value greatly increased for higher temperatures. On the other hand, a less significant influence of the strain rate on G(IC) was found, which slightly decreased by increasing the strain rate.