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POWER PLANT COMPONENT DESIGN USING CREEP-DAMAGE ANALYSIS

机译:基于蠕变损伤分析的电站组件设计

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摘要

The constitutive equation for the creep deformation rate, as well as the kinetic equations for hardening, recovery and damage processes, with a continuous functional dependence on temperature, are proposed. The material model is able to describe the primary, secondary and tertiary stages of creep behavior. The technique for the identification of parameters in the uniform model is developed on the basis of experimental creep curves for a wide range of temperatures and stresses. The parameter fitting for a creep-damage model with temperature dependence is carried out for one typical heat-resistant steel widely used in the power plant industry. Numerical results are obtained by the Finite-Element-Method for a real power plant component using the ABAQUS code and incorporated user-defined materials routines.
机译:提出了蠕变变形率的本构方程,以及硬化,恢复和破坏过程的动力学方程,其中函数对温度的影响连续。材料模型能够描述蠕变行为的主要,次要和第三阶段。在大范围温度和应力的实验蠕变曲线的基础上,开发了用于确定均匀模型中参数的技术。针对一种温度依赖性的蠕变损伤模型的参数拟合,是针对一种广泛用于电厂行业的典型耐热钢进行的。使用ABAQUS代码并结合用户定义的材料例程,通过有限元方法获得了实际电厂组件的数值结果。

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