Abstract
Ultrasonic lockin and burst-phase thermography establish more and more as failsave NDT methods in the scope of inspection of light-weight composite structures. The methods were not fully transferred to heavy load bearing members used in constructional steelwork so far. The investigation of three massive components, a steel plate, a 3 m long hot rolled girder and an extremely thick-walled welded joint revealed the applicability of ultrasonic lockin, burst and sweep procedures. The influence of the coupling location and the thermal response behaviour of single and multiple defects are discussed. The use of differential laser vibrometry is introduced in order to examine the extent of relative motion of crack faces and to analyse the connection between mode III oscillation velocity and crack detectability.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
