File:The elastic properties of concrete under bi-axial loading (1912) (14595222667).jpg

Identifier: elasticpropertie00mill (find matches)
Title: The elastic properties of concrete under bi-axial loading
Year: 1912 (1910s)
Authors: Millard, Floyd Hays
Subjects: Concrete Theses
Publisher:
Contributing Library: University of Illinois Urbana-Champaign
Digitizing Sponsor: University of Illinois Urbana-Champaign

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Pig. 46.8-in. cube 2072 sftev Failure specimen slioTrn in Fig. 45. Tlie bearing plates are still in place.The extent to Yihlch grease squeezed out from under the platesmay be seen at the top of the cube. Tlie cracl:s are verticaland they extern the full height of the specimen. Those on theright hand vertical face developed first, followed immediatelyby the large oracle on the left hand vertical face. The specimenwas pulled apart after the picture yies taleen. No cones vjereformed. The oracles exter^ded through the specimen forming longthin f iriger-lilve pieces. a5.«, Stress-Deformatioig Relations and Strencth of Cuhft!^.-Deformations Tzere measured on four cubes. The ir^dividual stress-
Text Appearing After Image:
159 deformation lines and the curves or average deforraation may befound in the bade of the thesis. The curves are cinillar tothose obtained on the cross of compression specimens tested v/ithequal loads on the ti?70 arms. The ultimate unit deformation of thecubes ^vas about the same as that on the cross of compressionspecimens. In -.ests of cubes and the cross of compressionspecimens the stress-deformation diagram was not as nearly aparabola as the stress-deformation diagram for the arm or on acylinder. The moduli of elasticity from cubes 2056-A and 2056-BTrere 2 520 000 and 5 460 000, values ?/hich compare favorablywith values obtained on the cross of compression specimens.Cubes 2055-A and 2055-B gave higher values. As v^as mentionedabove, failure of cubes was produced by effect of expansion, andthe amount of expansion rather than the amount of compressivedeformation is the criterion of strength. That the cubes failedthrough overcoming the tensile streiigth of the concrete in thelate

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