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Stress-enhanced silica/water reaction under torsion loading

Schell, K. G. ORCID iD icon; Fett, T.; Rizzi, G.

Abstract:

Water reacting with silica causes the generation of hydroxyl SiOH accompanied by a volume or swelling expansion. The principle of LeChatelier ensures that the hydroxyl concentration increases with increasing externally applied stresses. From the analysis in [1,2] it becomes obvious that
a) the hydroxyl concentration must depend on the multi-axiality of the
applied stresses, and
b) that the swelling effect is anisotropic.
On the basis of the results in [1,2] it will be shown that under torsion loading the strongest effects on stress-enhanced hydroxyl generation and swelling strains should occur, although this stress state shows a disappearing hydrostatic stress term.


Volltext §
DOI: 10.5445/IR/1000094329
Veröffentlicht am 08.05.2019
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Angewandte Materialien – Keramische Werkstoffe und Technologien (IAM-KWT1)
Publikationstyp Forschungsbericht/Preprint
Publikationsjahr 2019
Sprache Englisch
Identifikator ISSN: 2194-1629
KITopen-ID: 1000094329
Verlag Karlsruher Institut für Technologie (KIT)
Umfang VI, 11 S.
Serie KIT Scientific Working Papers ; 118
KIT – Die Forschungsuniversität in der Helmholtz-Gemeinschaft
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