Accession Number:

ADA071480

Title:

Large Deformation Elastic-Plastic Buckling Analysis of Spherical Caps with Initial Imperfections.

Descriptive Note:

Corporate Author:

GEORGE WASHINGTON UNIV WASHINGTON D C SCHOOL OF ENGINEERING AND APPLIED SCIENCE

Personal Author(s):

• Kao,Robert

Report Date:

1979-05-01

Pagination or Media Count:

52.0

Abstract:

Large deformation elastic-plastic buckling loads are obtained for axisymmetric spherical caps with initial imperfections. The problem formulation is based on equilibrium equations in which the plastic deformation is taken as effective plastic loads. Plasticity theory is derived from von Mises initial yield condition and Prager-Ziegler kinematic hardening rule. Results show that both initial imperfection and plastic deformation have the same effect of reducing buckling loads, and that the influence of plastic yielding diminishes as the magnitude of imperfections increases. Author

Descriptors:

• *FINITE ELEMENT ANALYSIS
• *SHELLS(STRUCTURAL FORMS)
• PLASTIC DEFORMATION
• KINEMATICS
• LOADS(FORCES)
• STRAIN HARDENING
• SPHERES
• FINITE DIFFERENCE THEORY
• DEFECTS(MATERIALS)
• PLATES
• BUCKLING
• SYSTEMS ANALYSIS
• CIRCULAR
• CAPPING
• STRESS RELAXATION

Subject Categories:

• Numerical Mathematics
• Mechanics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE