Titlebook: Direct Methods; Methodological Progr Aurora Angela Pisano,Konstantinos Vassilios Spilio Book 2021 The Editor(s) (if applicable) and The Aut

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Limit Fire Analysis of 3D Framed Structures Based on Time-Dependent Yield Surfaces,safe states at increasing fire durations up to the limit fire duration, that is the time of exposure which leads to structural collapse. The procedure represents a global fire analysis able to take account of the stress redistribution over the frame. Numerical examples are given to illustrate the proposal.

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On Cyclic Steady States and Elastic Shakedown in Diffusion-Induced Plasticity,e to construct both lower and upper bounds of the set of loadings for which elastic shakedown occurs, in the spirit of Melan and Koiter theorems in classical plasticity. An illustrative example—for which all the relevant calculations can be done in closed-form—is presented.

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Numerical Method for Quasi-static and Dynamic Elastoplastic Problems by Symplectic Brezis-Ekeland-N statics and dynamics. We apply it numerically to solve the classical problem of a tube problem in plane strain subjected to an internal pressure in statics and dynamics. An excellent agreement is obtained between the numerical results obtained by the BEN approach and the reference numerical solution.

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Evaluation of Human Bones Load Bearing Capacity with the Limit Analysis Theory,of human bones. Such a prediction can be useful to prevent skeletal diseases, osteoporosis and bones fractures; a problem of great interest in biomechanics and of relevant socio-economic impact in modern societies. A constitutive model of Tsai-Wu-type in principal stress space is assumed for the hum

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Limit Analysis of Complex 3D Steel Structures Using Second-Order Cone Programming,r cone programming (SOCP). The classic upper and lower bound principles of yield analysis, naturally written as optimization problems, are formulated as a pair of dual second-order cone programs which are then solved using a state-of-the art primal-dual interior point method (IPM). The IPM shows goo

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