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Download Fracture and Failure of Natural Building Stones by Stavros K. (Ed.) Kourkoulis, Stavros K. Kourkoulis PDF

By Stavros K. (Ed.) Kourkoulis, Stavros K. Kourkoulis

The recovery and conservation of stone monuments is a classy multi-disciplinary job and the selections ultimately reached has to be in line with an organization and specified wisdom of the mechanical behaviour of either the real fabrics and the factitious stones. during this quantity scientists from diverse disciplines (Structural Engineers, Archaeologists, Architects, Chemical Engineers, Geologists) current their adventure and their clinical paintings in development in regards to the homes of a chain of stones which were used for the erection of a few of crucial stone monuments of the overseas cultural history and are used this day for substitution of lacking components or of completion of broken ones. hence it really is noticeable that the quantity may be a really useful gizmo within the palms of a vast number of scientists operating within the box of the development fabrics of historical monuments: It bargains with the topic globally and it includes unpublished study effects about the fabrics which are used or might be used for the conservation of the foreign cultural history.

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Extra resources for Fracture and Failure of Natural Building Stones

Example text

5 mm from it, is plotted in Figure 15, according to both the numerical analysis and the experimental results. It is concluded that the isotropic model predicts strains significantly higher from those of the orthotropic one. The experimental results support the predictions of the latter. Some deviations appear only along the axis of symmetry of the notch. The comparative study of the amplification of the strain field due to the presence of different types of notches, according to both the isotropic and the orthotropic models can be carried out with the aid of Figures 16(a,b).

Further study is required before definite conclusions are drawn and also in order to determine the dimensions of the specimens for which the assumption of not interacting notches is valid. 4. DISCUSSION AND CONCLUSIONS The radial distribution of the reduced axial strain along the line ș=0o is plotted in Figure 13 as it is obtained both from the experimental measurements (empty symbols and dotted line) as well as from the numerical analysis (filled symbols and continuous lines), for the semi-circular notched specimens.

The dependence of the radial strains on the distance from the tip of the notch. 5 the transverse strains remain essentially constant for the whole range of ș. The variation of the radial strains is more complicated; the slope of the curves changes sign depending on the angle ș. 3)/İrr(r/ȡ=9) approaches 20 indicating a tremendous influence of the notch on the radial strain. 2 Specimens with U-shaped notches The dependence of the tangential (longitudinal for ș=0Ƞ) and radial strains on the axial stress is shown in Figures 8(a,b), according to the data of the rosettes along the line connecting the tips of the two notches.

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