THERMAL AND FREEZING STRAINS ON A FACE OF WET SANDSTONE SAMPLES UNDER A SUBZERO TEMPERATURE CYCLE

Autor:	Y. Takeshita, M. Kurashige, K. Hirose, F. Nishimura, K. Imai, M. Furuzumi
Rok vydání:	2004
Předmět:	Condensed Matter::Materials Science Hysteresis Materials science Thermal Diagram Thermodynamics General Materials Science Cooling rates Condensed Matter Physics Strain gauge Rock sample
Zdroj:	Journal of Thermal Stresses. 27:331-344
ISSN:	1521-074X 0149-5739
DOI:	10.1080/01495730490427573
Popis:	Some laboratory tests showed rather strange hysteresis loops in strain–temperature space, where the strains were measured with a strain gauge on the surface of a wet cubic rock sample under a subzero temperature cycle. This report gives introductory remarks and the first result on a new project launched by the present authors. The project is intended to make clear the major mechanisms responsible for the unexpected hysteresis loops in the strain–temperature diagram, in which an abrupt increase in strains appeared at a halfway point of the cooling process at higher cooling rates. The hysteresis loops suggest that various thermal and mechanical (or physical) phenomena take place within the rock sample; some possible candidates of causes behind the phenomena are discussed and a hypothesis associated with them is proposed. Furthermore, to separate an unexpected part of the hysteresis loop from its “regular” part, thermal strains on the surface of a spherical sample under a temperature cycle are calculated wit...
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::2e098045d58843aa170cfb5ec9d3c226 https://doi.org/10.1080/01495730490427573 Zobrazit plný text záznamu Plný text ve formátu PDF Plný text ve formátu HTML
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