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Mechanical and fatigue properties of long carbon fiber reinforced plastics at low temperature

Both the epoxy strength and internal compressive strength were employed as factors in a compound law to numerically estimate the low-temperature tensile strength. This work presents a systematic analysis for changes in the CFRP material properties at low temperatures. | Journal of Science Advanced Materials and Devices 4 2019 577e583 Contents lists available at ScienceDirect Journal of Science Advanced Materials and Devices journal homepage www.elsevier.com locate jsamd Original Article Mechanical and fatigue properties of long carbon fiber reinforced plastics at low temperature Mitsuhiro Okayasu Yuki Tsuchiya Graduate School of Natural Science and Technology Okayama University 3-1-1 Tsushimanaka Kita-ku Okayama 700-8530 Japan a r t i c l e i n f o a b s t r a c t Article history The mechanical properties of long unidirectional UD and crossply CR carbon fiber reinforced plastics Received 18 June 2019 CFRPs were investigated at a low temperature 196 C . The CFRPs were fabricated from 60 vol. Received in revised form carbon fiber and epoxy resin. The bending strength of the UD-CFRP was approximately twice that of the 26 September 2019 CR-CFRP. The high strength of the UD-CFRP was directly attributed to the amount of carbon fiber oriented Accepted 6 October 2019 Available online 14 October 2019 along the loading direction 60 for UD-CFRP compared with 30 for CR-CFRP. The low-temperature 196 C tensile and fatigue strengths of the UD-CFRP were over 1.5 times greater than those at room temperature 20 C . This was attributed to the increased epoxy strength at low temperatures along Keywords CFRP with the internal compressive stress arising from the different thermal expansion coefficients of the Carbon fiber carbon fiber and epoxy. Both the epoxy strength and internal compressive strength were employed as Tensile strength factors in a compound law to numerically estimate the low-temperature tensile strength. This work Fatigue strength presents a systematic analysis for changes in the CFRP material properties at low temperatures. Low temperature 2019 Publishing services by Elsevier B.V. on behalf of Vietnam National University Hanoi. This is an open access article under the CC BY license http creativecommons.org licenses by 4.0 . 1. Introduction