Collapse Analysis for Shells of General Shape


Book Description

F33615-69-C-1523AF-1467AFFDLTR-71-8-Vol-2See also report dated Aug 72, AD-751 702.(*shells(structural forms), failure(mechanics)), (*computer programming, instruction manuals), structural properties, loads(forces), buckling, plastic properties, bodies of revolution, subroutinesnewton-raphson method, collapse, programming manuals, finite difference theory, *stags computer program, structural analysisThe manual presents STAGS, a comprehensive computer code. STAGS is intended for the static analysis of arbitrary shells including the effects of nonlinearities caused by material behavior and finite deformations. Collapse loads based on nonlinear analysis can be computed as well as buckling loads based on classical bifurcation buckling theory with linear prestress. Arbitrary thermal and mechanical loadings can be specified. The manual rpovides instructions for use of the code and presents sample problems and solutions. The program is under development and the version presented here is expected to be updated in 1973. The previous report, Volume 1 (AD-751 702), contains the numerical analysis.







Scientific and Technical Aerospace Reports


Book Description

Lists citations with abstracts for aerospace related reports obtained from world wide sources and announces documents that have recently been entered into the NASA Scientific and Technical Information Database.







Advances in Applied Mechanics


Book Description

This highly acclaimed series provides survey articles on the present state and future direction of research in important branches of applied mechanics










Buckling of Shells


Book Description

Thin shells are very popular structures in many different branches of engineering. There are the domes, water and cooling towers, the contain ments in civil engineering, the pressure vessels and pipes in mechanical and nuclear engineering, storage tanks and platform components in marine and offshore engineering, the car bodies in the automobile industry, planes, rockets and space structures in aeronautical engineering, to mention only a few examples of the broad spectrum of application. In addition there is the large applied mechanics group involved in all the computational and experimental work in this area. Thin shells are in a way optimal structures. They play the role of·the "primadonnas" among all kinds of structures. Their performance can be extraordinary, but they can also be very sensitive. The susceptibility to buckling is a typical example. David Bushnell says in his recent review paper entitled "Buckling of Shells - Pitfall for DeSigners": "To the layman buckling is a mysterious, perhaps even awe inspiring phenomenon that transforms objects originally imbued with symmetrical beauty into junk".