The two Non-Destructive Evaluation [ NDE ] techniques viz., Air Coupled Ultrasonic [ACU ] and Pulsed Thermography [PT ] find many applications in aerospace industry . These NDE techniques can be used for debond detection in spacecraft structural components like honeycomb sandwich deck plates, shear web panels and central cylinder made of aluminum core and composite face sheets. The Air coupled ...

Acoustic sonic and ultrasonic resonance analysis is a new non-destructive testing technique that allows 100% testing of a wide range of test objects quickly and at low cost. After an impact, a specimen vibrates in certain characteristic modes and frequencies that can be measured by a microphone or laser vibrometer. Typical faults that can be detected are cracks, cavities, detached layers, mater...

Kissing bonds are adhesive bonding defects and are thought to arise from either contamination of the surfaces during manufacture or various forms of environmental attack. . When adhesives are used for safety critical applications the current method is to undertake extremely careful process control. None-the-less premature failure of adhesive joints still occurs and kissing bonds are often the m...

Internal stress in structural steel members is an important parameter for steel structures in their design, construction, and service stages. However, it is hard to measure via traditional approaches. Among the existing non-destructive testing (NDT) methods, the ultrasonic method has received the most research attention. Longitudinal critically refracted (Lcr) waves, which propagate parallel to...

First proposed in the 1970s for non-destructive testing, the modern reincarnation of photoacoustic microscopy (PAM) has major impact in bio-medicine, spanning a wide range of applications from flow cytometry and cancer research to ophthalmology, neuroimaging and cardiovascular diagnostics. The hybrid nature of PAM combining optical excitation and acoustic detection provides it with a number of ...

Ultrasonic imaging has applications in many industries, such as non destructive testing, medical imaging, and industrial applications. Previous research into ultrasonic imaging has focused on offline processing of echo data. A topic of increasing interest is real-time processing of ultrasonic data. Due to the microstructure of materials the echo signal contains a high amount of clutter noise. I...

Structural health monitoring (SHM) is an important aspect of the assessment various structures and infrastructure, which involves inspection, monitoring, maintenance to support economics, quality life sustainability in civil engineering. Currently, research has been conducted order develop non-destructive techniques for SHM extend lifespan monitored structures. This paper will review summarize ...

The liquid penetrant testing, and its capillary variety, and control of airtightness, are based on the filling by the liquid defectoscopic substances of capillaries and capillary-porous bodies. Physicomechanical interaction on the boundary liquid solid body influences seriously the eventual result of control. For the first time we investigated phenomena, as interaction in the capillary of two c...

Ultrasonic measurements have been performed for comprehensive microstructural characterisation in 9 % Cr ferritic steels. The variation in grain size, the effect of solution annealing temperature on microstructure developed, the variation in microstructure of the weld joints, the effect of post weld heat treatment and precipitation behaviour during thermal ageing and creep testing have been suc...