Material options to replace glass fibre reinforced polymer composite in remote freezer
Tossavainen, Anniina (2019)
2019
Materiaalitekniikan DI-ohjelma - Degree Programme in Materials Science and Engineering
Tekniikan ja luonnontieteiden tiedekunta - Faculty of Engineering and Natural Sciences
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Hyväksymispäivämäärä
2019-12-13
Julkaisun pysyvä osoite on
https://urn.fi/URN:NBN:fi:tuni-201912096678
https://urn.fi/URN:NBN:fi:tuni-201912096678
Tiivistelmä
Glass fibre reinforced polymer (GFRP) composites are used as base materials in remote freezers. GFRP has many disadvantages such as poor recyclability and harmfulness for peoples’ health. In addition, it has poor dimensional stability due to relatively high thermal expansion and uneven quality in manufacturing. The aim of this thesis is to find material solution which removes mentioned disadvantages and offers better properties.
Finding new material options began with defining the key features of the freezer base which are among other things corrosion resistance, surface quality, dimensional stability, strength, hardness, wear resistance, thermal conductivity and formability. After determining these properties, a large number of materials were screened to fulfil the properties at a sufficient level. GFRP was used as a reference, but the comparison was difficult due to lack of experimental test data of the current material. By using material selection charts and comparing technical properties, the most optimal materials for testing were chosen. Availability of materials changed original test material plan but ordered materials were close to original selections. A few test materials were ordered because they were suggestions from supplier. Test methods were selected to measure as well as possible the required key properties.
Test results were compared with each other and GFRP. Based on the test results and analyzation, new material options and future prospects of the research are presented in conclusions.
Keywords: glass fibre reinforced polymer composite, base materials of freezers, chemical resistance, mechanical properties, material selection process, material testing
The originality of this thesis has been checked using the Turnitin OriginalityCheck service.
Finding new material options began with defining the key features of the freezer base which are among other things corrosion resistance, surface quality, dimensional stability, strength, hardness, wear resistance, thermal conductivity and formability. After determining these properties, a large number of materials were screened to fulfil the properties at a sufficient level. GFRP was used as a reference, but the comparison was difficult due to lack of experimental test data of the current material. By using material selection charts and comparing technical properties, the most optimal materials for testing were chosen. Availability of materials changed original test material plan but ordered materials were close to original selections. A few test materials were ordered because they were suggestions from supplier. Test methods were selected to measure as well as possible the required key properties.
Test results were compared with each other and GFRP. Based on the test results and analyzation, new material options and future prospects of the research are presented in conclusions.
Keywords: glass fibre reinforced polymer composite, base materials of freezers, chemical resistance, mechanical properties, material selection process, material testing
The originality of this thesis has been checked using the Turnitin OriginalityCheck service.