Influence of cyclic frozen and defrost on mechanical properties of polytetrafluoroethylene (PTFE)-coated woven fabrics

• Autorzy: Ambroziak Andrzej , Kłosowski Paweł

Identyfikatory

DOI

10.24425/ace.2023.144161

Warianty tytułu

PL

Wpływ cyklicznego zamrażania i rozmrażania na właściwości mechaniczne tkanin technicznych powlekanych politetrafluoroetylenem (PTFE)

• Języki publikacji: EN

Abstrakty

EN

This research aims to determine the influence of the cyclic process of freezing and defrosting on the mechanical properties of the chosen glass fibres and PTFE-coated woven fabrics. The specimens were subjected to freezing at about -20°C for 4 h and thawing by full immersion into the water at about +20°C for 4 h. The fabric samples after 25 and 50 frozen cycles were air-dried at room temperature for one week and then subjected to uniaxial tensile tests. The same tests have been performed on a reference group of specimens, which were not exposed to temperature change. The authors determined the tensile strength, and longitudinal stiffnesses resulting from performed tests. Although the investigated coated woven fabrics expressed a reduction in the tensile strength in water soaking conditions, the performed frozen cycles don’t show a significant decrease in strength under uniaxial tensile tests.

PL

Artykuł opisuje badania tkanin technicznych wykonanych z włókana szklanego i powlekanych politertafluroetylenem (PTFE) (ang. PTFE-coated woven fabric), które mają na celu określenie wpływu cyklicznych procesów zamrażania i rozmrażania na właściwości mechaniczne wybranych tkanin Próbki tkanin technicznych zostały poddane zamrażaniu w temperaturze około -20°C przez 4 godziny i rozmrażaniu przez całkowite zanurzenie w wodzie w temperaturze około +20°C przez 4 godziny. Próbki tkanin technicznych po 25 i 50 cyklach zamrażania suszono na powietrzu w temperaturze pokojowej przez tydzień, a następnie poddano próbom jednoosiowego rozciągania. Na podstawie testów jednoosiowego rozciągania określono wytrzymałość na rozciąganie i moduły sztywności. Pomimo, iż w badanych tkaninach powlekanych następuje spadek wytrzymałości na rozciąganie w warunkach ich namoczenia w wodzie, to wykonane cykle zamrażania nie wykazują znacznego spadku wytrzymałości w próbach jednoosiowego rozciągania.

Słowa kluczowe

EN

construction material; freeze resistance; mechanical properties; PTFE coating; coated fabric; woven fabric; uniaxial tensile test

PL

materiał konstrukcyjny; mrozoodporność; właściwości mechaniczne; tkanina techniczna; tkanina powlekana; powłoka PTFE; próba jednoosiowego rozciągania

• Wydawca: Komitet Inżynierii Lądowej i Wodnej PAN ; Politechnika Warszawska, Wydział Inżynierii Lądowej
• Czasopismo: Archives of Civil Engineering
• Rocznik: 2023
• Tom: Vol. 69, nr 1
• Strony: 91--104
• Opis fizyczny: Bibliogr. 41 poz., il., tab.

Twórcy

autor

Ambroziak Andrzej

• Gdansk University of Technology, Faculty of Civil and Environmental Engineering, Gdańsk, Poland

• https://orcid.org/0000-0002-7735-7863

autor

Kłosowski Paweł

• Gdansk University of Technology, Faculty of Civil and Environmental Engineering, Gdańsk, Poland

• https://orcid.org/0000-0002-4329-2678

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