In order to obtain the accurate test data of FCP, a new device for monitoring the small crack and measuring its length is designed and manufactured to support the experiments in this study.

• 为获得可靠的疲劳裂纹扩展速率的实验数据，自行研制成功高分辨率裂纹实时监测系统，从技术方面为本文中的实验工作提供了有力的支持。