Acoustic Emission Monitoring

TISEC specializes in acoustic emission monitoring. This inspection technique detects elastic waves generated within a test specimen by such mechanisms as plastic deformation, fatigue and fracture. It differs from ultrasonic inspection, which actively probes the structure; acoustic emission listens for emissions from active defects and is very sensitive to defect activity when a structure is loaded beyond its service load in a proof test. This process can detect flaws and imperfections such as the initiation and growth of fatigue cracks in steel structural members; the failure of bonds, fibres and filaments in composite materials and the appearance of potentially hazardous flaws in metal or synthetic pressure vessels.

We use acoustic emission monitoring as an advanced, cost-effective, sensitive technique for detecting and locating potential problem areas. We then follow up this process with other nondestructive test techniques to quantify problems in the areas identified by acoustic emission testing.
At TISEC, we have acquired many years of experience in applying acoustic emission monitoring to assessing the integrity of a wide variety of civil structures including:

Bridges contain a large number of joints, welds and connections that are potential initiation points for fatigue cracks. TISEC uses acoustic emission monitoring for early detection of fatigue cracks in fracture critical tensile bridge members and to monitor the relative activity of existing fatigue cracks. Advanced signal processing and correlations to parametric measurements are used to isolate noise from dynamic loading, loose connections, rivets and corrosion crack growth.

To purchase the Acoustic Emission Handbook, please click here to go to our online store and click on "Materials Reliability Library" link.

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