Volume 37 Issue 1
Feb 2023
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BAI Hui, HUI Hu, YANG Yuqing. Effect of Hygrothermal Aging on Mechanical Properties of Glass Fiber/Epoxy VER Composites[J]. Chinese Journal of High Pressure Physics, 2023, 37(1): 014103. doi: 10.11858/gywlxb.20220641
Citation: BAI Hui, HUI Hu, YANG Yuqing. Effect of Hygrothermal Aging on Mechanical Properties of Glass Fiber/Epoxy VER Composites[J]. Chinese Journal of High Pressure Physics, 2023, 37(1): 014103. doi: 10.11858/gywlxb.20220641

Effect of Hygrothermal Aging on Mechanical Properties of Glass Fiber/Epoxy VER Composites

doi: 10.11858/gywlxb.20220641
  • Received Date: 16 Aug 2022
  • Rev Recd Date: 21 Sep 2022
  • Available Online: 20 Feb 2023
  • Issue Publish Date: 05 Feb 2023
  • In this paper, the mechanical properties of glass fiber/epoxy vinyl ester resin (GF/epoxy VER) composite after hygrothermal aging were studied. The GF/epoxy VER composites laminates were fabricated by vacuum assisted injection molding technology. According to the stress characteristics of composite pressure vessels during service, bending and shearing samples were made by water cutting technology. Considering the working environment of pressure vessel, accelerated aging tests were carried out on the samples soaked in water to analyze the changes of the mass and mechanical properties of the composites at different temperatures and periods. Results show that bending and shear properties of composite materials decrease with the increase of water immersion time. The effect of temperature on the properties of composites is more significant than that of soaking time. If immersed in 90 ℃ water for 6 weeks, the shear strength, flexural strength and flexural modulus of the composite are reduced to half of the initial value.

     

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