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https://doi.org/10.24143/2073-1574-2024-4-7-17
Copy DOIPublication Date: Nov 25, 2024 |
The problem of determining the ability of a liquid to penetrate into the structure of a composite material prepared using reinforcing glass fabrics and a polyester binder is solved. The determination of the ability of water to penetrate into the structure of samples cut from a common plate of polymer composite materials (PCM) is carried out by determining the change in weight of samples before and after their immersion in a container with a liquid medium (water) for a certain period of time. The ability of water penetration into the composition of this material has been established depending on its structure, that is, on the location of the reinforcing material. The mechanical properties (tensile, compressive and bending strength) of a composite material after its removal from a liquid container are presented. The problem of the possibility of the effect of processing the ends of cut test samples with polyester resin on the ability of liquid penetration into the composition of a PCM is solved. For this purpose, samples cut from a common plate were immersed in containers with water, while the ends of one batch of samples were coated with polyester resin, and the other batch was uncoated. The influence of the presence of samples in a liquid medium (water) with a certain ratio of layers of reinforcing material (glass wool and roving fiberglass) on their mechanical characteristics during bending, stretching and compression has been established. The test results of the samples are presented, which showed a direct dependence of the tensile strength and destructive force on the number of roving layers in the PCM structure of the samples whose edges were treated with polyester resin. During the experiments, the ability of liquid penetration into the structure of composite materials and changes in mechanical properties as a result of immersion of these materials in a liquid medium were determined. The obtained results of experimental tests of samples made of PCM with various reinforcement schemes will justify their widespread use in ship hull structures, in particular, as a material for the manufacture of ship tanks.
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