Abstract
AbstractA finite element program is developed as a tool to analyse shells of revolution with local non‐linearities. In reality, shells of revolution often exhibit local deviations, like a cut‐out, a junction and/or an imperfection. The stress concentration around a local deviation may produce plasticity and/or geometric non‐linearities in the surrounding region. The analytical model consists of three different types of elements: rotational, transitional and general. The rotational shell elements are used in the region where the shell is axisymmetrical and linear, while the two‐dimensional general shell elements are deployed in the deviation region where non‐linearities may occur. Transitional shell elements connect the two distinctively different types of elements to achieve displacement field continuities. The solution using the local‐global system with appropriate condensation and a predicted stress incremental procedure is suggested. It is shown that the technique is a very attractive alternative to the entirely general element style analysis for axisymetric shell structures with local deviations.
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