BACKGROUND:This paper presents a simple and effective formulation based on a rotation-free isogeometric approach for the assessment of collapse limit loads of plastic thin plates in bending.METHODS:The formulation relies on the kinematic (or upper bound) theorem and namely B-splines or non-uniform rational B-splines (NURBS), resulting in both exactly geometric representation and high-order approximations. Only one deflection variable (without rotational degrees of freedom) is used for each control point. This allows us to design the resulting optimization problem with a minimum size that is very useful to solve large-scale plate problems. The optimization formulation of limit analysis is transformed into the form of a second-order cone programming problem so that it can be solved using highly efficient interior-point solvers.RESULTS AND CONCLUSIONS:Several numerical examples are given to demonstrate reliability and effectiveness of the present method in comparison with other published methods.
CITATION STYLE
Nguyen-Xuan, H., Thai, C. H., Bleyer, J., & Nguyen, P. V. (2014). Upper bound limit analysis of plates using a rotation-free isogeometric approach. Asia Pacific Journal on Computational Engineering, 1(1). https://doi.org/10.1186/s40540-014-0012-5
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