Accession Number : AD0714519

Title :   Deformation of Rigid-Plastic Spherical Shells in Low Velocity Impact.

Descriptive Note : Technical rept.,

Corporate Author : LEHIGH UNIV BETHLEHEM PA

Personal Author(s) : Updike,Dean P.

Report Date : 01 APR 1970

Pagination or Media Count : 52

Abstract : The behavior of a rigid-perfectly plastic spherical shell loaded under static conditions simulating low velocity impact of the shell against a flat rigid surface is considered. Large axisymmetric deformations of the shell are investigated. At each stage of deformation an approximate limit load and corresponding velocity field are found for an assumed deformed shape of the shell, which later is shown to be very close to the calculated deformed shape. A simple formula relating the total axial force on the shell to the displacement of the shell is derived, and its range of validity is investigated. Finally, the results of some static tests of shells are shown to agree favorably with the theory. (Author)

Descriptors :   (*SHELLS(STRUCTURAL FORMS), LOADS(FORCES)), (*SHIP HULLS, IMPACT TESTS), DEFORMATION, PLASTIC PROPERTIES, STRESSES, STRAIN(MECHANICS)

Subject Categories : Marine Engineering
      Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE