نتایج جستجو برای: non destructive ultrasonic testing

تعداد نتایج: 1650926  

2013
P. Mestre P. Melo-Pinto J. Morais

Wood is a natural material that due to its properties has been used for years in many applications such as construction and furniture industries. Being a natural material it is prone to defects which must be detected, preferably during the early stage of product production. Testing of wood pieces, to detect defects or to determine some of its properties, can be made using two types of technique...

Journal: : 2023

This research is devoted to investigate relationship between both Ultrasonic Pulse Velocity and Rebound Number (Hammer Test) with cube compressive strength also study the effect of steel reinforcement on these relationships. A was carried out 32 scale model reinforced concrete elements. Non destructive testing campaign (mainly ultrasonic rebound hammer tests) made same About 72 cubes (15 X 15 X...

2016

One of the most useful tests for examining relative sheet quality changes is sonic propagation through and along sheets. Originally rediscovered for paper in the 1960’s, the technique is often underutilized and overlooked for paper applications in favor of mechanical measurements. A major selling point for ultrasonic measurements is that it is comparatively quick, requiring no particular sample...

2005
KYUNGMI LEE VLADIMIR ESTIVILL-CASTRO

A-scans from ultrasonic testing of long shafts are complex signals. The discrimination of different types of echoes is of importance for non-destructive testing and equipment maintenance. Research has focused on selecting features of physical significance or exploring classifier like Artificial Neural Networks and Support Vector Machines. This paper confirms the observation that there seems to ...

Journal: :Ultrasonics 2015
Emilia Vasanelli Donato Colangiuli Angela Calia Maria Sileo Maria Antonietta Aiello

UPV as non-destructive technique can effectively contribute to the low invasive in situ analysis and diagnosis of masonry elements related to the conservation, rehabilitation and strengthening of the built heritage. The use of non-destructive and non-invasive techniques brings all the times many advantages in diagnostic activities on pre-existing buildings in terms of sustainability; moreover, ...

2013
Angam Praveen K Vijayarekha Saju T Abraham B Venkatraman

Non Destructive testing of structural materials is an important activity in many industries. Ultrasonic NDT is one such method widely used in this field. Pulse Echo and Through Transmission are conventional testing techniques which use reflected and transmitted sound energy respectively. But these techniques are highly dependent on defect orientation. Time of Flight Diffraction (TOFD) is a rece...

2008
Michele CARBONI

Non Destructive Testing applied to railway axles is performed both in production and in maintenance. During production, NDT is carried out at different stages adopting different techniques, while during maintenance (in-service inspection) only ultrasonic testing is usually carried out. The present paper is focused on some aspects of calibration related to the in-service inspection of railway ax...

2010
Roman KOCH

For a long time, Ultrasonic Testing Machines for aircraft components have been built with almost 100% custom made mechanics (gantry or bridge design) to match customer needs. This design comes with several disadvantages like price, delivery time or lack of flexibility. This article illustrates an alternative approach to Testing Machine design for the Aerospace industry and describes in detail t...

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