Wyniki wyszukiwania - BazTech

1

Analysis of the influence of adding rubber recyclate on the strength properties of epoxy-glass composites

Abramczyk Norbert, Żuk Daria, Panasiuk Katarzyna

Journal of KONBiN

|

2023

|

Vol. 53, iss. 1

1--24

EN

The article attempts to assess the possibility of using rubber recyclate as a component of composite materials. Research is being carried out to develop a technology for the production of composite materials with the addition of rubber waste. These tests are aimed at increasing the reliability and safety of the operation of structures exposed to longterm impact of devices generating vibrations. At the same time, work is underway on the use of complex composite surfaces as sound-absorbing elements. The new direction of using recyclates will have a positive impact on the management of environmentally harmful waste, taking into account a favorable economic factor.

PL

W artykule podjęto próbę oceny możliwości wykorzystania recyklatu gumowego jako składnika materiałów kompozytowych. Prowadzone są badania mające na celu opracowanie technologii wytwarzania materiałów kompozytowych z dodatkiem odpadu gumowego. Badania te są ukierunkowane na zwiększenie niezawodności i bezpieczeństwa obsługi konstrukcji narażonych na długotrwałe oddziaływanie urządzeń generujących wibracje. Jednocześnie trwają prace nad wykorzystaniem złożonych powierzchni kompozytowych jako elementów dźwiękochłonnych. Nowy kierunek wykorzystania recyklatów będzie miał korzystny wpływ na zagospodarowanie szkodliwych dla środowiska odpadów z uwzględnieniem korzystnego czynnika ekonomicznego.

2

Statistical methods in the analysis of strength parameters of epoxy-glass composites modified with rubber recyclate

Drewing S., Abramczyk N., Żuk D., Dyl T.

Journal of Achievements in Materials and Manufacturing Engineering

|

2023

|

Vol. 117, nr 2

71--78

EN

Purpose The article presents a statistical analysis of strength parameters of newly developed epoxy-glass composite materials modified with the addition of rubber recyclate. Design/methodology/approach Three variants of materials with a percentage of recyclate content in the composite matrix of 3%, 5%, 7% and a reference variant without the addition of recyclate were used for the study. The samples were subjected to an impact test on a ZWICK RKP 450IR-GE impact hammer. Resilience measurement values were subjected to statistical analyses at the significance level α = 95%, such as: testing the normality of distributions with the Shapiro-Wilk test, testing differences between pairs with the Student's t-test for dependent groups, and testing ANOVA differences for independent groups. Findings The Shapiro-Wilk test confirmed that the resilience variables for all tested samples were in normal distributions; therefore the highest power parametric tests were used to test the differences. Using the Student's t-test, it was confirmed that between pairs of variables in configurations: standard sample with the modified sample, there were significant statistical differences in the distribution of resilience values for all samples. ANOVA confirmed significant changes in impact strength in 10 comparison variants. Research limitations/implications The obtained test results showed that in 9 compared cases, there were significant statistical differences, and in one case, there were no significant differences. Practical implications The performed statistical analyses confirmed their significant usefulness in the process of qualification of strength parameters for materials with high anisotropy, such as composites. Originality/value The manufactured products are innovative in terms of the method of using the addition of rubber recyclate as a filler for epoxy-glass composites. The use of static methods for their study also has practical value. It optimizes the analysis methods of the results of measurements of strength parameters of new composite materials.

3

Use of 3d optical techniques in the analysis of the effect of adding rubber recyclate to the matrix on selected strength parameters of epoxy–glass composites

Charchalis Adam, Kneć Marcin, Żuk Daria, Abramczyk Norbert

Acta Mechanica et Automatica

|

2023

|

Vol. 17, no. 3

333--346

EN

The article presents a method of modifying the strength properties of epoxy–glass composite by changing the percentage composition of the matrix by the addition of rubber recyclate. Taking into account environmental protection and economic conditions in the process of recycling and utilisation of waste, it is advisable to look for applications of non-degradable waste materials. Based on epoxy resin, a glass mat with a random direction of fibres and rubber recyclate, a test material with different percentage compositions was produced. Samples from the manufactured materials were subjected to a static tensile test on a ZwickRoell testing machine using the ARAMIS SRX measuring system. In addition, CT (computerized tomography) scans of the inside of the samples were made using a ZEISS METROTOM 6 Scout tomograph, and observations of the internal structures were made using a scanning electron microscope. The use of optical and microscopic techniques enabled the precise determination of strength parameters of the examined composites and the analysis of the behaviour of samples under load. The analysis of deformations over time in the examined samples showed a beneficial effect of the addition of rubber recyclate on the elastic properties of the examined composites.

4

Influence of the type of layered distribution of rubber recyclate as an additive modifying the mechanical properties of epoxy-glass composites

Abramczyk N., Żuk D., Panasiuk K., Dyl T.

Archives of Materials Science and Engineering

|

2022

|

Vol. 118, nr 2

61--66

EN

Purpose: The research aimed to determine the effect of adding rubber recyclate as a sandwich layer of sandwich composites made based on glass mat and epoxy resin EPO 652. Design/methodology/approach: Four types of research materials with a 5% addition of rubber recyclate and with different ways of layer distribution in the composite and one variant without the addition of recyclate as a comparative material were produced for the study. Samples made of the materials in question were subjected to a static tensile test to determine the changes in strength parameters caused by the addition and distribution of the modifier. Findings: Four types of research materials with a 5% addition of rubber recyclate and with different ways of layer distribution in the composite and one variant without the addition of recyclate as a comparative material were produced for the study. Samples made of the materials in question were subjected to a static tensile test to determine the changes in strength parameters caused by the addition and distribution of the modifier. Research limitations/implications: As a result of the conducted research, the fundamental influence of the recyclate additive and its distribution method on the changes in parameters recorded during the static tensile test was clearly found. Practical implications: The analyses carried out enable the selection of the optimal material variant depending on the intended application. Originality/value: The analysis of the preliminary results obtained during the research showed that epoxy-glass composites based on EPO 652 resin with the addition of rubber recyclate in the form of two and three sandwich layers have better strength parameters than the composite with random addition of recyclate to the matrix. The material characterized by the highest plasticity is a variant with two layers of recyclate spacers. At the same time, it can be stated that the highest values of relative deformation ε obtained a composite with one sandwich layer of rubber recyclate.