Accession Number:

AD0260825

Title:

DESIGN AND ANALYSIS OF STRUCTURAL ELEMENTS

Descriptive Note:

Corporate Author:

DUKE UNIV DURHAM N C

Personal Author(s):

Report Date:

1961-08-04

Pagination or Media Count:

1.0

Abstract:

Because the exact theoretical solution of warped surfaces is so cumbersome, an experimental investigation was made in order to attempt a correlation between a simplified theory and experimental results. Stresses and displacements were obtained experimentally for warped surfaces and compared with similar flat plates. Results indicate that the axial stresses in a flat plateARE OF THE SAME ORDER OF MAGNITUDE AS THE AXIAL STRESSES IN A HYPERBOLIC PARABOLOID AND THAT THE BENDING STRESSES IN A FLAT PLATE ARE MANY TIMES GREATER THAN THE CORRESPONDING STRESS IN A GEOMETRICALLY SIMILAR HYPERBOLIC PARABOLOID. Deflections in a flat pl te are an order of magnitude greater than the corresponding de lections in geometrically similar hyperbolic paraboloids. Thus, experimental evidence indicates that a favorable weight to strength ratio may be obtained by slight changes in the design of structural elements by warping the s rface. The usual simplified theory for hyperbolic paraboloids has been found unreliable as there is little correlation between theory and experiment. Author

Subject Categories:

Distribution Statement:

APPROVED FOR PUBLIC RELEASE