Accession Number : AD0712522

Title :   INELASTIC BUCKLING OF AXISYMMETRIC SHELLS.

Descriptive Note : Technical rept.,

Corporate Author : NOTRE DAME UNIV IND COLL OF ENGINEERING

Personal Author(s) : Hayes,James C. ; Lee,Lawrence H. N.

Report Date : AUG 1970

Pagination or Media Count : 64

Abstract : An incremental variational method is presented for the determination of the inelastic load-deformation relationship, as well as the buckling or collapse load for a shell of revolution which is made of a work hardening material and subjected to axisymmetric loadings. A variational principle involving the Kirchhoff stress tensor, the Green strain tensor, and their rates is employed. The isothermal stress-strain relationship based on a modified J2 incremental theory of plasticity is used. A seven sheet sandwich shell idealization and the finite difference method of variational calculus are utilized in a numerical procedure in order to determine discrete velocities and a subsequent deformation process. The buckling loads of a number of elastic and inelastic cylindrical and truncated conical shells as well as inelastic spherical shell caps are determined. The results of the present analysis, obtained numerically by a Univac 1107 digital computer, compare favorably with available experimental data. (Author)

Descriptors :   (*BUCKLING, SHELLS(STRUCTURAL FORMS)), (*AEROSPACE CRAFT, LOADS(FORCES)), (*UNDERWATER VEHICLES, LOADS(FORCES)), CYLINDRICAL BODIES, CONICAL BODIES, SPHERES, STRESSES, STRAIN(MECHANICS), DEFORMATION, ELASTIC PROPERTIES, TENSOR ANALYSIS, COMPUTER PROGRAMMING

Subject Categories : Structural Engineering and Building Technology
      Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE