...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Engineering failure analysis >Physically based constitutive modeling of concrete fatigue and practical numerical method for cyclic loading simulation
【24h】

Physically based constitutive modeling of concrete fatigue and practical numerical method for cyclic loading simulation

机译：基于物理型疲劳型混凝土疲劳的构建与循环加载模拟的实用数值方法

获取原文
获取原文并翻译 | 示例
   

获取外文期刊封面封底 >>

       
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Fatigue failure is usually modelled by estimating fatigue lifetime with corresponding S-N curve and fatigue damage accumulation law such as Miner's law. This approach can neither track the stress redistribution induced by fatigue damage nor explain the mechanism of fatigue damage evolution properly. In this paper, a constitutive model for concrete fatigue is developed within the framework of continuum damage mechanics, where fatigue damage can capture the gradual degradation of mechanical performance in concrete. The conventional phenomenologically modelled fatigue damage evolution is built with an explanation on its physical mechanism. Then, in order to increase computational efficiency instead of taking cycle-by-cycle approach to track fatigue damage evolution in FEM simulation, an accelerating numerical scheme based on two temporal scales homogenization is employed to make computational cost acceptable. The simulation results are compared with fatigue experimental results to validate the proposed constitutive model and accelerating numerical scheme.
机译：疲劳失败通常是通过估计疲劳寿命的模拟，具有相应的S-N曲线和疲劳损害累积法，如矿工法。这种方法既不能跟踪疲劳损坏引起的应力再分布，也不能解释疲劳损伤效果的机制。本文在连续损伤力学框架内开发了一种混凝土疲劳的组成型模型，其中疲劳损坏可以捕获混凝土中机械性能的逐渐降解。通过对其物理机制的解释，建立了传统的现象模型疲劳损伤演化。然后，为了提高计算效率而不是采取逐循环的方法来跟踪有限元模拟中的疲劳损伤演化，采用基于两个时间尺度均匀化的加速数值方案来进行计算成本。将仿真结果与疲劳实验结果进行比较，以验证所提出的本构模型和加速数值方案。

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