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Abstract

This report details the results of the first phase in a joint European code validation exercise on the static shear buckling behaviour of thin, low aspect ratio stainless steel cylinders. Linear and non-linear finite element analyses were performed by four organizations using three different computer codes, i.e. NNC (UK)- ABAQUS, ISMES (Italy) - ABAQUS, CEA (France) - BILBO/INCA and NOVATOME (France) - NOVNL. The computed results were compared directly with experimental results. It was discovered that refined finite element models were essential if accurate buckling loads were to be calculated. Buckling analyses in 3D were therefore computationally expensive and 2D analyses, where applicable, proved a useful alternative. Traditional linear (Euler) bifurcation analysis seriously over-estimated the buckling loads by around 50%. Extrapolation techniques can however be used to reduce this discrepancy. Elasto-plastic bifurcation analysis predicted conservative buckling loads close to the experimental value. Non-linear, large displacement analyses were performed on the vessel. The effect of geometrical imperfections in the vessel was considered. These analyses all over-estimated the experimental buckling load by 10%-25% and appeared to be largely insensitive to the initial imperfection size. Each of the codes appeared to predict reasonably well the final buckled geometry although the analytical load deflection estimate did not agree exactly with the experiment. This work was restricted to a cylinder where geometric and material non-linearities were small. The second phase of the work will consider shear buckling of cylinders where material plasticity is significant.

Additional information

Authors: DOSTAL M, NNC (UK);ISMES (ITALY);CEA (FRANCE);NOVATOME (FRANCE);AUSTIN N M, NNC (UK);ISMES (ITALY);CEA (FRANCE);NOVATOME (FRANCE);PEANO A, NNC (UK);ISMES (ITALY);CEA (FRANCE);NOVATOME (FRANCE);COMBESCURE A, NNC (UK);ISMES (ITALY);CEA (FRANCE);NOVATOME (FRANCE);BASTIEN R, NNC (UK);ISMES (ITALY);CEA (FRANCE);NOVATOME (FRANCE);CARNOY E G NNC (UK), NNC (UK);ISMES (ITALY);CEA (FRANCE);NOVATOME (FRANCE);ISMES (ITALY), NNC (UK);ISMES (ITALY);CEA (FRANCE);NOVATOME (FRANCE);CEA (FRANCE), NNC (UK);ISMES (ITALY);CEA (FRANCE);NOVATOME (FRANCE);NOVATOME (FRANCE), NNC (UK);ISMES (ITALY);CEA (FRANCE);NOVATOME (FRANCE)
Bibliographic Reference: EUR 10592 EN (1986) FS, 133 P., BFR 450, EUROFFICE, LUXEMBOURG, POB 1003
Availability: Can be ordered online
Record Number: 1989125028200 / Last updated on: 1987-03-01
Category: PUBLICATION
Available languages: en