[PDF] Top 20 Ultrasound field measurement and modelling for non-destructive testing

... is non-contact and couplant free and can work at high ...application. Ultrasound may be generated without presence of external magnetic field as excitation electric current provides magnetic ... See full document

... A reliable, yet affordable technique will obviously be preferred by customers and operators alike. It is thought that the costs of the application of NDT can be reduced through enhanced sensitivity and improved ... See full document

... electric field is applied [Arnau ...the measurement device must drive a high-voltage pulse across its ...typically non-zero when the probe separation is ... See full document

... generate ultrasound using the "air-breakdown" mechanism by focusing down the laser beam to a point in the air, just above the sample under test, as shown schematically in Figure ...electric field, ... See full document

... simply testing new designs without the aid of a well-developed mathematical ...this field was given in ...evanescent field recovering ability of a metamaterial with its thickness, as well as the ... See full document

... both non-linear ultrasound and attenuation of ultrasound have the potential for use as a technique for white layer ...through measurement of acoustic ... See full document

... the field of inspecting a layer of deteriorating concrete have been proven to be ...between non-aged and aged solid propellant material, ultra- sonic waves that propagate inside the material and reach the ... See full document

... between Destructive (Compressive test) and Non-destructive testing techniques (Schmidt Rebound ...from destructive process conformed to targeted mix value, whereas that of the Rebound ... See full document

... useful non-contacting non-destructive tool that has not yet met its full potential as a non-destructive testing (NDT) technique in the mechanical maintenance ... See full document

... Before starting of a test, the rebound hammer should be tested against the specimen (anvil), to get reliable results. The testing specimen should be of steel having Brinell hardness number of about 5020 N/mm 2 . ... See full document

... The Swiss engineer Helmut Heinrich Waldemar Schmidt reported experiments with a concrete take a look at hammer that measures the surface hardness of concrete (Schmidt, 1950, 1951). The device, called the Helmut Heinrich ... See full document

... The study of adhesive bonds between metals will benefit large area especially the manufacturing industries. These industries involved the sector of automotive, aircrafts, and also applied in developing of the hovercraft ... See full document

... technique applied to 5mm RIM with reflective paint and 5mm W.Glass impacted at 55.6J and 28.6J respectively and tested using High Temperature PVT... technique applied to 3mm Perpendicula[r] ... See full document

... One of the most common applications in this field is the testing of the structural integrity of pressure tanks. In some countries (for example Italy), the current legislation provides for the use of this ... See full document

... The devices used for data-recording are error-prone. This means that a lot of work has to be done to eliminate/minimize the systematic error occurring due to the measuring de- vices, compare Fig. 7. At a first glance ... See full document

... Due to beam divergence, in traditional synthetic aperture imaging the lateral resolution degrades with depth. Considering a focal point positioned some distance from the transducer, as the depth from the transducer to ... See full document

... 1) Thermography Infrared Technique: During the thermography inspections two different approaches are possible for measuring the infrared radiation in NDT. A passive approach [16]; Or an active approach [17]. In this ... See full document

... time. Non Destructive Testing is the appropriate solution to this ...structure. Non Destructive testing help to assess the health of structure & how much repairs, ... See full document

... While it is possible to measure DMY in individual plants, there is a low correlation between individual plant FW or DW and sward DMY in perennial grasses [23, 24]. Given that grass used for amenity and economic pur- ... See full document

... This project was inspired by the need to know the actual capabilities of non-destructive testing techniques for use on concrete structures. A number of common problem types have been considered and ... See full document