• 主题
高级搜索  >
历史搜索 清空历史
首页> 美国政府科技报告 >Detection of Microcracks in Trunnion Rods Using Ultrasonic Guided Waves.
【24h】

Detection of Microcracks in Trunnion Rods Using Ultrasonic Guided Waves.

机译：超声波导波检测耳轴杆微裂纹。

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

摘要

Posttensioned rods are used to anchor spillway gates and transfer the forces from the reservoir pool through the gates to the spillway structures. Large tensile loads are applied to these high-strength steel rods to compress the surrounding concrete and prevent it from experiencing excessive destructive tensile forces. These rods are now experiencing ongoing failures. The Corps of Engineers is in need of reliable nondestructive testing (NDT) methods that are rapid, robust, and capable of detecting and quantifying defects. Methods to detect microcracks are required to be rapid because of the large number of rods that exist at some installations. Robustness is required to handle the significant variations in design, construction, and field conditions that are known to exist. Defect detection and quantification provides tracking and monitoring data important for planning and prioritizing remediation efforts or operational practices. This research to date has defined and demonstrated acoustical guided waves as a methodology to detect cracks that are orthogonal to the axis of the trunnion rods. A test method and equipment specifications have been developed as well as methods for dealing with field conditions such as anchor rods with rough cut ends.

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