A Koiter's perturbation strategy for the imperfection sensitivity analysis of thin-walled structures with residual stresses |
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Authors: | A. D. Lanzo |
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Affiliation: | DiSGG, Università della Basilicata, 85100 Potenza, Italy |
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Abstract: | This paper suggests a strategy for the imperfection sensitivity analysis of elastic thin-walled structures with notable residual stresses. The analysis is carried out by means of a Koiter's perturbation approach. The concept of imperfection, traditionally associated with geometric and load factors, is extended in this paper to the residual stresses. The strategy is implemented in a FEM code. A comparison of the obtained results allows a discussion on the accuracy and the influence of the different coefficients connected to the asymptotic analysis of the residual stresses. |
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Keywords: | Elastic stability Imperfection sensitivity analysis Perturbation method FEM Thin-walled structures |
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