Volume: 2, 2023
2nd International PhD Student’s Conference at the University of Life Sciences in Lublin, Poland:
ENVIRONMENT – PLANT – ANIMAL – PRODUCT
Abstract number: T007
DOI: https://doi.org/10.24326/ICDSUPL2.T007
Published online: 19 April 2023
ICDSUPL, 2, T007 (2023)
Effect of high temperatures on the properties of CFRP composite
Michał Budka1*
1 Solid State Mechanics Department, Civil engineering, surveying and transportation Faculty, Lublin university of technology; st. Nadbystrzycka 38 D, 20 – 618, Lublin, Poland
* Corresponding author: m.budka@pollub.pl
Abstract
Nowadays, many of produced structures are exposed to harsh environmental conditions and high loads. As an alternative to traditional construction materials, fibre-reinforced composites with a polymer matrix have been developed. One such carbon fibre-reinforced composite is CFRP (Carbon Fiber Reinforced Polymer). Despite its high strength properties and resistance to many environmental factors, the composite should not be exposed directly to high temperatures. This is a consequence of the low glass transition temperature (Tg) of matrix material. For example, the epoxy resin, which is popular as a composite binder reaches a glass transition temperature equal only to 78°C. In order to protect composites protective outer layers or intra-structural graphene nanoplatelets are used. However, due to the possible failure of the protective layers or the occurrence of unexpected thermal loading of unprotected composites, it is necessary to determine the effect of thermal degradation on the properties of the composites. This paper presents the results of laboratory tests of thermal degradation for CFRP. During these tests, the composite specimens were exposed to high temperatures between 250°C and 300°C for a period of time between 65 min to 90 min. Due to the thermal degradation the composites samples under the most unfavourable conditions have reduced their mass up to 7,68% and increased thickness up to 53%. After the samples were subjected to high-temperature annealing, a delamination effect was observed in parts of the composites. The effect of high temperatures also resulted in a decrease of up to 33% in the test tensile strength of the composite specimens. Depending on the annealing temperature a change in the failure form of the sample was also observed.
How to cite
M. Budka, 2023. Effect of high temperatures on the properties of CFRP composite. In: 2nd International PhD Student’s Conference at the University of Life Sciences in Lublin, Poland: Environment – Plant – Animal – Product. https://doi.org/10.24326/ICDSUPL2.T007