Effects of high-low temperature on properties of carbon fiber/epoxy resin composite high-pressure vessel
In order to obtain the environmental adaptability on the T1000 carbon fiber/epoxy resin composite vessel,and to grasp inherent characters on the high-low temperature adaptability of the vessel,the composite vessel(titanium as lining,carbon fiber/epoxy resin as composite layer)with volume 50 L and operating pressure 30 MPa was regarded as an object of study,firstly,the thermal vacuum and thermal cycle test data of the pressurized vessel under high-low temperature circulation were introduced(the composite vessel was successfully verified by thermal vacuum and thermal cycle test and had high pressure bearing capacity in the temperature range of-40-80℃).Secondly,using tensile samples with the same composites of the vessel(the winding angle is 0° and 90° respectively),the tensile properties data of the composites after experiencing different gradient high and low temperature were obtained through high-low temperature limit diagnostic test,and the tensile strength attenuation rule affected by high-low temperature was obtained through data comparative analysis.Finally,a reliability assessment method on the high-low temperature limit diagnostic test was offered.The results show that,in the range of-50-100℃,the tensile strength and elongation at break of the samples change less,when the temperature is above 100℃,the properties of fibers and resin decay,resulting in a significant reduction in tensile strength,and when the temperature is below-50℃,the performance of the resin attenuates,and the fibers are less affected.The reliability of the vessel high-low temperature limit diagnostic test is greater than 0.999,indicating that the alterna-tive method of using high-low temperature tensile strength data of the tensile sample has high equivalence.
compositehigh-pressure vesselT1000 carbon fiber winding vesselenvironmental adaptabilityhigh-low temperature effect
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