ISSN:
1082-5010
Schlagwort(e):
concrete
;
fracture
;
uniaxial compression tests
;
boundary restraint
;
slenderness
;
Engineering
;
Civil and Mechanical Engineering
Quelle:
Wiley InterScience Backfile Collection 1832-2000
Thema:
Architektur, Bauingenieurwesen, Vermessung
,
Maschinenbau
Notizen:
Localization of deformations has been investigated in a series of displacement controlled uniaxial compression experiments. Of main interest are the effects of specimen slenderness and friction between loading platen and specimen. Both effects have a direct influence on the development of localized fracture zones in the specimen. The results indicate that the use of a double layer of teflon with an intermediate layer of grease yields size-independent results as far as the pre-peak stress-strain behaviour and the peak strength are concerned. However, in terms of stress and strain, a significant influence of both the specimen slenderness and the amount of boundary restraint has been observed in the post-peak regime. It is found that the post-peak curves become almost completely identical when they are plotted in terms of nominal stress and post-peak displacement. For any type of loading platen used, the post-peak relative stress-displacement curves are found to be independent of the specimen height. Furthermore, since during post-peak localization relative sliding and movements of larger parts of the specimen are observed, the definition of a unique Poisson's ratio is virtually impossible.
Zusätzliches Material:
10 Ill.
Materialart:
Digitale Medien
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