3 декабря, 2015 
Pokraskin Structural Health Monitoring (SHM) can be defined as the method by which sensors are utilized to identify and quantify structural integrity through a continuous in-service monitoring process. In this manner, corrective maintenance can be performed when required before the structure reaches the critical point of catastrophic sudden failure.
Even though adhesively bonded composite joints have a number of advantages over conventional mechanical fastening, they have some drawbacks too. Adhesively bonded joint is a permanent joint and it can’t be disassembled for maintenance and damage inspection. Therefore, it is highly essential to monitor the state of the joint throughout its service life in order to prevent drastic failures, to optimize use of the structure which also identifies the scope of future product development and improvements.
There are a number of techniques in the field of SHM for analyzing structural integrity of bonded composite joints. Most of the conventional monitoring systems, such as microscopic failure analysis, ultrasonic, X-ray, thermography and eddy current method are off-line techniques [10, 11], i. e., it’s not possible to monitor real time during the service life. But for adhesively bonded joints, real time in-situ monitoring is required. SHM techniques which enable the possibility of in-situ monitoring include acoustic emission, carbon nanotubes network, active vibration method and backface strain based technique.
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