Fracture Toughness Testing of Engineering Materials Using Hybrid Quantitative Nondestructive Techniques

该仪器采用超声衰减和散斑图像相关应变测量相结合的技术，通过提供紧凑、快速和坚固的无损检测系统来解决这些问题，以评估材料的宏观性能和全尺寸操作结构上关键位置的表面裂纹张开位移。扩展了分析性超声无损评估与机械性能之间的基本关联，评估了坚固耐用的超声衰减测量系统，集成了基于散斑相关的应变传感设备。

The proposed instrumentation using the combined ultrasonic attenuation and speckle image correlation strain measurement techniques addresses these problems by providing a compact, rapid and robust nondestructive examination system for evaluating the material macroscopic properties and surface crack-opening displacements at critical locations on the full scale operating structures. Extension of the fundamental correlation between analytical ultrasonic nondestructive evaluation and mechanical performance, evaluation of a rugged ultrasonic attenuation measurement system, integration of speckle correlation-based strain sensing device.