Determination of the critical loads of shells by nondestructive methods

Autor:	E. M. Nassar, M. K. Singhal, W. H. Horton
Rok vydání:	1977
Předmět:	Critical load Materials science business.industry Mechanical Engineering Shell (structure) Aerospace Engineering Stiffness Structural engineering Instability Buckling Mechanics of Materials Solid mechanics medicine medicine.symptom business Buckle Test data
Zdroj:	Experimental Mechanics. 17:154-160
ISSN:	1741-2765 0014-4851
DOI:	10.1007/bf02324214
Popis:	Two methods for determining the location of and load level to produce instability of compressed cylindrical shells are presented. The first relates the variation in the wall normal stiffness as a function of applied compressive force to the critical load. It uses the distribution of stiffness over the surface of the shell as a guide to buckle location. The second method associates the local dynamic mass with instability behavior. The test data presented show that either method will give excellent prediction capability from low-load-level data for shells of orthodox form. Neither method appears to apply to spirally stiffened shells. This is thought to be due to the fact that there is a substantial difference between the buckle pattern under axial compression and the imperfection shape induced by the normal displacement which is used to ascertain the wall stiffness and the dynamic mass.
Databáze:	OpenAIRE
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