engleski

Shakedown Limit Load Multipliers for Materials with Temperature-dependent Yield Stress

For the elastic perfectly plastic materials with convex yield functions in the stress-temperature space, Borino and Polizzotto [1] established the static and kinematic shakedown theorems which present a theoretical and computational improvement with respect to the classical shakedown theorems extended to the materials with temperature-dependent yield stress [7, 8, 11]. In order to simulate actual shakedown behavior of elastic-thermo-plastic structures resulting from experimental investigations, the material model of the German mild steel St 37 is considered for determination of the shakedown limit load multipliers. It is found that the obtained elastic shakedown multipliers have the lower values than the corresponding multipliers obtained by the classical shakedown theorems. Two examples are compared with the well-known solutions obtained for the neglected yield stress dependence on temperature.

Shakedown of Materials with Temperature-Dependent Yield Stress; Limit Load Multipliers

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