The paper proposes a comparison of the Huber-Mises-Hencky and the Burzyński thermal effort hypothesis to determine the state of stresses and strains in a structural element undergoing thermally variable cyclic loading. The proposed Burzyński temperature-dependent hypothesis has been used to define the equivalent stress as well as the yield surface for heat-resistant St12T steel indicating an essential strength differential effect. Since this effect increases with temperatures, the shape changes and surface movement were analyzed. As an example of application, numerical simulations of thermal loading were performed for a steam turbine blade made of St12T steel. The results of the analysis were used to describe a possible consequences between plasticity models based on the Huber-Mises-Hencky hypothesis and the thermally-validated Burzyński hypothesis.

本文提出了对Huber-Mises-Hencky和Burzyński热力假设的比较，以确定在承受热可变循环载荷的结构元件中的应力和应变状态。所提出的Burzyński温度相关假设已被用来定义耐热St12T钢的等效应力以及屈服面，表明基本的强度差异效应。由于此影响随温度增加，因此分析了形状变化和表面运动。作为应用示例，对由St12T钢制成的蒸汽轮机叶片进行了热负荷的数值模拟。