Accession Number : AD0617570

Title :   THREE-DIMENSIONAL STRESS CONCENTRATION AROUND A CYLINDRICAL HOLE IN A SEMI-INFINITE ELASTIC BODY.

Descriptive Note : Technical rept.,

Corporate Author : CALIFORNIA INST OF TECH PASADENA DIV OF ENGINEERING AND APPLIED SCIENCE

Personal Author(s) : Youngdahl,Carl K. ; Sternberg,Eli

Report Date : MAY 1965

Pagination or Media Count : 54

Abstract : This paper contains a three-dimensional solution, exact within classical elastostatics, for the stresses and deformations arising in a halfspace with a semi-infinite transverse cylindrical hole, if the body--at infinite distances from its cylindrical boundary-- is subjected to an arbitrary uniform plane field of stress that is parallel to the bounding plane. The solution presented is in integral form and is deduced with the aid of the Papkovich stress functions by means of an especially adapted, unconventional, integral-transform technique. Numerical results for the non-vanishing stresses along the boundary of the hole and for the normal displacement at the plane boundary, corresponding to several values of Poisson's ratio, are also included. These results exhibit in detail the three-dimensional stress boundary layer that emerges near the edges of the hole in the analogous problem for a plate of finite thickness, as the ratio of the plate-thickness to the diameter of the hole grows beyond bounds. The results obtained thus illustrate the limitations inherent in the two-dimensional plane-strain treatment of the spatial plane problem; in addition, they are relevant to failure considerations and are of interest in connection with experimental stress analysis. (Author)

Descriptors :   (*STRESSES, BOUNDARY VALUE PROBLEMS), (*BOUNDARY VALUE PROBLEMS, STRESSES), (*ELASTIC PROPERTIES, CYLINDRICAL BODIES), NUMERICAL ANALYSIS, INTEGRAL TRANSFORMS

Distribution Statement : APPROVED FOR PUBLIC RELEASE