• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>International Journal of Fatigue >房建土建工程中的高支模施工技术分析
【24h】

房建土建工程中的高支模施工技术分析

机译：房建土建工程中的高支模施工技术分析

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

The energy transition and the associated increase in the share of regenerative energies require flexible power plant operation to compensate fluctuations in residual load. As a result of the decreasing dwell times at constant high temperatures, the significance of fatigue damage gains in importance. At present, existing design codes are of limited validity for this new loading scenario. This necessitates the development of adapted design codes based on damage tolerance concepts. For this reason the frequency dependent threshold behavior of the ferritic/martensitic steel X20CrMoV12-1 was investigated in a temperature range from 300 degrees C to 600 degrees C. In order to exploit the maximum lifetime of a component without compromising safety, detailed knowledge on active crack closing mechanisms is of elementary importance. Therefore, a general experimental approach for separation and quantification of crack closure mechanisms and their impact on crack propagation threshold values was developed. By this methodology, both the influence of temperature and corrosion on the threshold can be separated and quantified despite superposition of several mechanisms. The only application criterion of this procedure is S-R 1, because roughness induced crack closure has to be negligible small. If roughness induced crack closure cannot be neglected, the methodology developed in this study has to be modified by models which quantify the influence of roughness induced crack closure.
机译：能量转换和相关的再生能量份额增加要求电厂灵活运行，以补偿剩余负荷的波动。由于在恒定高温下的停留时间减少，疲劳损伤的重要性变得越来越重要。当前，现有的设计规范对于这种新的加载方案具有有限的有效性。这就需要根据损伤容忍性概念开发适应性设计规范。因此，在300摄氏度至600摄氏度的温度范围内研究了铁素体/马氏体钢X20CrMoV12-1随频率变化的阈值行为。为了在不损害安全性的前提下充分利用部件的最大使用寿命，有关活性成分的详细知识裂纹闭合机制至关重要。因此，开发了一种用于分离和量化裂纹闭合机理及其对裂纹扩展阈值的影响的通用实验方法。通过这种方法，尽管有多种机制的叠加，但温度和腐蚀对阈值的影响都可以被分离和量化。该程序的唯一应用标准是S-R 1，因为粗糙度引起的裂纹闭合必须小到可以忽略不计。如果不能忽略粗糙度引起的裂纹闭合，则必须通过量化粗糙度引起的裂纹闭合影响的模型来修改本研究中开发的方法。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号