Next generation nondestructive inspection using guided-wave mixing

该项目旨在开发一种新的早期损伤检测方法。它依赖于对存在损伤时不同输入波模式之间的非线性超声相互作用进行系统的实验研究，以确定最优模式选择和操作参数，从而最大限度地提高对特定形式的结构损伤的敏感性。还将研究在役载荷对混波响应的影响，以及适用于难以检查的表面条件的非接触检测。这些新的发展将有助于将现有的基于时间表的维护做法转变为基于条件的维护模式，以实现显著的维护成本节约。

This project aims to develop a novel approach for early damage detection. It relies on a systematic experimental investigation of nonlinear ultrasonic interaction between different input wave modes in the presence of damage, so as to identify optimal mode selections and operating parameters that will maximise the sensitivity to particular forms of structural damage. The effects of in-service loading on wave-mixing response, and non-contact detection suitable for hard-to-inspect surface conditions, will also be investigated. The new developments will help transform existing schedule-based maintenance practice to a condition-based maintenance paradigm, to achieve significant cost savings in maintenance.