Abramczyk Norbert, Hajdukiewicz Grzegorz, Charchalis Adam, Żuk Daria
Faculty of Marine Engineering, Gdynia Maritime University, 81-225 Gdynia, Poland.
Materials (Basel). 2024 Oct 18;17(20):5079. doi: 10.3390/ma17205079.
The article presents an analysis of the results obtained during the three-point bending test for seven variants of epoxy rubber-glass composites manufactured according to innovative technology. Different contents of rubber recyclate (3, 5, and 7%) and different methods of distribution of the recyclate in the composite structure (1, 2, and 3 layers with a constant share of 5% of the recyclate) were used in the tested materials. To determine the stress values at which critical failures of the tested materials are initiated in the bending test, an analysis was carried out using the Kolmogorov-Sinai () metric entropy calculations. The analysis results showed that for each of the above-mentioned variants of the tested epoxy-glass composites, the onset of critical changes occurring in the material structure occurs below the recorded values of the flexural strength . The decrease in the value in relation to is different for different material variants and depends mainly on the % content of rubber recyclate and the amount and method of decomposition of rubber recyclate in the layers of the analyzed materials. The research showed that the introduction of rubber recyclate into the composition of composites has a positive effect on their strength properties. This process allows for the efficient use of hard to degrade waste and opens up the possibility of using the newly developed materials in many industrial sectors.
本文对采用创新技术制造的七种环氧橡胶 - 玻璃复合材料变体在三点弯曲试验中获得的结果进行了分析。测试材料中使用了不同含量的橡胶回收物（3%、5%和7%）以及回收物在复合材料结构中的不同分布方式（1层、2层和3层，回收物的恒定占比为5%）。为了确定在弯曲试验中测试材料开始出现临界失效时的应力值，使用柯尔莫哥洛夫 - Sinai（）度量熵计算进行了分析。分析结果表明，对于上述每种测试的环氧 - 玻璃复合材料变体，材料结构中发生临界变化的起始点出现在记录的弯曲强度值以下。不同材料变体的 值相对于 的降低情况不同，并且主要取决于橡胶回收物的%含量以及分析材料各层中橡胶回收物的分解量和方式。研究表明，将橡胶回收物引入复合材料的组成中对其强度性能有积极影响。这一过程允许有效利用难以降解的废物，并为在许多工业领域使用新开发的材料开辟了可能性。
