FRINK Linked Data Fragments server

Matches in SemOpenAlex for { <https://semopenalex.org/work/W2018741069> ?p ?o ?g. }

• W2018741069 endingPage "81" @default.
• W2018741069 startingPage "78" @default.
• W2018741069 abstract "The defect detection capabilities of transient thermography and shearography have been compared using optimum excitation methods for each technique: short pulse heating for thermography and vibration excitation using a piezoelectric transducer for shearography. A signal-to-noise ratio and limit of detection analysis has been performed on defect images obtained by the two techniques using the different excitation methods. Test samples considered in this paper are flat-plate samples made from aluminium, mild steel, stainless steel, CFRP and thermoplastic, containing flat-bottomed hole artificial defects of 20mm diameter at depths ranging from 0.5mm to 3.0mm. The technique of flash thermography involves using a short duration (~1ms) high intensity flash of light to heat the surface of a test piece. The test piece surface temperature is recorded by an infrared camera and computer system as it decays due to heat being conducted into the part after its deposition on the surface. Sub- surface defects reduce the conduction of heat away from the surface and therefore reduce the surface cooling rate compared to that occurring over non-defective regions. Consequently, a surface temperature contrast develops over a defect that can be used to detect a defective region. Shearography, otherwise known as shearing speckle interferometry, is a technique that uses interferometry to measure the out of plane displacement gradient of a sample's surface. The presence of defects will alter the way in which a sample reacts to an applied stress (in this case created by vibrating the test sample) and this change can be observed using shearography thereby inferring the presence of the defect. In shearography a speckle pattern is applied to the surface of the test sample and the sample is illuminated using expanded collimated (i.e. laser) light. The light is reflected diffusely from the surface of the sample and passes through a lens and shearing device to be recorded by a video camera and processed. The shearing device acts to slightly change the path of half of the rays of light reflected by the speckles, causing the reflected light from neighbouring speckles to overlap and produce an image sheared in the shearing direction. A reference sheared image is stored with the sample in an unstressed condition and the sample is then stressed. The stressing can take many forms, mechanical strain (e.g. with a vacuum hood or by applying a bending load with a clamp), thermal stress (generated by heating or cooling the sample), or vibration excitation (using a piezoelectric transducer as is the case in this testing). A second sheared image is recorded with the sample in the stressed state, and the interferometric superposition of these two images creates an interferogram that represents the phase difference of neighbouring speckle sources. From this phase difference the gradient of the surface displacement can be calculated." @default.
• W2018741069 created "2016-06-24" @default.
• W2018741069 creator A5002338457 @default.
• W2018741069 creator A5014234254 @default.
• W2018741069 date "2010-02-01" @default.
• W2018741069 modified "2023-09-25" @default.
• W2018741069 title "Comparison of the defect detection capabilities of flash thermography and vibration excitation shearography" @default.
• W2018741069 cites W1966961991 @default.
• W2018741069 cites W1982104027 @default.
• W2018741069 cites W2008340695 @default.
• W2018741069 cites W2035545046 @default.
• W2018741069 cites W2159202061 @default.
• W2018741069 doi "https://doi.org/10.1784/insi.2010.52.2.78" @default.
• W2018741069 hasPublicationYear "2010" @default.
• W2018741069 type Work @default.
• W2018741069 sameAs 2018741069 @default.
• W2018741069 citedByCount "6" @default.
• W2018741069 countsByYear W20187410692013 @default.
• W2018741069 countsByYear W20187410692014 @default.
• W2018741069 countsByYear W20187410692018 @default.
• W2018741069 countsByYear W20187410692020 @default.
• W2018741069 countsByYear W20187410692021 @default.
• W2018741069 countsByYear W20187410692022 @default.
• W2018741069 crossrefType "journal-article" @default.
• W2018741069 hasAuthorship W2018741069A5002338457 @default.
• W2018741069 hasAuthorship W2018741069A5014234254 @default.
• W2018741069 hasConcept C120665830 @default.
• W2018741069 hasConcept C121332964 @default.
• W2018741069 hasConcept C138246806 @default.
• W2018741069 hasConcept C158355884 @default.
• W2018741069 hasConcept C192562407 @default.
• W2018741069 hasConcept C198394728 @default.
• W2018741069 hasConcept C24890656 @default.
• W2018741069 hasConcept C2777526259 @default.
• W2018741069 hasConcept C2779222261 @default.
• W2018741069 hasConcept C56529433 @default.
• W2018741069 hasConcept C62520636 @default.
• W2018741069 hasConceptScore W2018741069C120665830 @default.
• W2018741069 hasConceptScore W2018741069C121332964 @default.
• W2018741069 hasConceptScore W2018741069C138246806 @default.
• W2018741069 hasConceptScore W2018741069C158355884 @default.
• W2018741069 hasConceptScore W2018741069C192562407 @default.
• W2018741069 hasConceptScore W2018741069C198394728 @default.
• W2018741069 hasConceptScore W2018741069C24890656 @default.
• W2018741069 hasConceptScore W2018741069C2777526259 @default.
• W2018741069 hasConceptScore W2018741069C2779222261 @default.
• W2018741069 hasConceptScore W2018741069C56529433 @default.
• W2018741069 hasConceptScore W2018741069C62520636 @default.
• W2018741069 hasIssue "2" @default.
• W2018741069 hasLocation W20187410691 @default.
• W2018741069 hasOpenAccess W2018741069 @default.
• W2018741069 hasPrimaryLocation W20187410691 @default.
• W2018741069 hasRelatedWork W1532283058 @default.
• W2018741069 hasRelatedWork W1998825372 @default.
• W2018741069 hasRelatedWork W2000772047 @default.
• W2018741069 hasRelatedWork W2078164543 @default.
• W2018741069 hasRelatedWork W2594508360 @default.
• W2018741069 hasRelatedWork W2625153435 @default.
• W2018741069 hasRelatedWork W2625206612 @default.
• W2018741069 hasRelatedWork W3128267379 @default.
• W2018741069 hasRelatedWork W4300531151 @default.
• W2018741069 hasRelatedWork W2522149371 @default.
• W2018741069 hasVolume "52" @default.
• W2018741069 isParatext "false" @default.
• W2018741069 isRetracted "false" @default.
• W2018741069 magId "2018741069" @default.
• W2018741069 workType "article" @default.