Scholarlink

A novel approach to solving the creep-damage problem of cyclically loaded elements of power engineering structures is presented. Cycles of short duration caused by vibration as well as long cycles caused by turbine shutdowns are considered. The total hidden damage of the material is estimated taking into account the damage due to creep and high cycle fatigue. A formulation of the boundary – initial value problem based on the methods of many time scales and averaging over cycle periods is presented. The new results of solving the creep-damage problem in the model of the rotor are given for different cases of static and cyclic loading. It is shown that taking into account the accumulation of high cycle fatigue damage significantly reduces the time until the completion of the hidden damage accumulation and leads to the fracture development in rotor.

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Creep and Damage Processes in Cyclically Loaded Model of Turbine Rotor

  • 会议论文

  • 发表日期：

    2025年

查看全文
  • Holm Altenbach,
  • Dmytro Breslavsky,
  • Alyona Senko,
  • Oksana Tatarinova

摘要

A novel approach to solving the creep-damage problem of cyclically loaded elements of power engineering structures is presented. Cycles of short duration caused by vibration as well as long cycles caused by turbine shutdowns are considered. The total hidden damage of the material is estimated taking into account the damage due to creep and high cycle fatigue. A formulation of the boundary – initial value problem based on the methods of many time scales and averaging over cycle periods is presented. The new results of solving the creep-damage problem in the model of the rotor are given for different cases of static and cyclic loading. It is shown that taking into account the accumulation of high cycle fatigue damage significantly reduces the time until the completion of the hidden damage accumulation and leads to the fracture development in rotor.