000169493 001__ 169493
000169493 005__ 20260302165029.0
000169493 0247_ $$2doi$$a10.1088/0957-0233/25/11/115601
000169493 0248_ $$2sideral$$a91883
000169493 037__ $$aART-2014-91883
000169493 041__ $$aeng
000169493 100__ $$aPech-May,N. W.
000169493 245__ $$aVertical cracks characterization using lock-in thermography: I infinite cracks
000169493 260__ $$c2014
000169493 5060_ $$aAccess copy available to the general public$$fUnrestricted
000169493 5203_ $$aEarly detection of cracks is a challenging task to prevent failures in working structures. In the last decades the ‘flying spot’ method, based on heating the sample with a moving laser spot and detecting the surface temperature with an infrared detector, has been developed to detect cracks in a fast manner. The aim of this work is to measure the width of an infinite vertical crack using lock-in thermography. An analytical solution for the surface temperature of a sample containing such a crack when the surface is illuminated by a modulated laser beam focused at a fixed spot close to the crack is obtained. Measurements on samples containing calibrated cracks have been performed using an infrared camera. A least square fit of the amplitude and phase of the surface temperature is used to retrieve the thickness of the crack. A very good agreement between the nominal and retrieved thicknesses of fissure is found, even for widths down to 1 µm, confirming the validity of the model.
000169493 540__ $$9info:eu-repo/semantics/openAccess$$aby-nc-nd$$uhttps://creativecommons.org/licenses/by-nc-nd/4.0/deed.es
000169493 590__ $$a1.433$$b2014
000169493 591__ $$aINSTRUMENTS & INSTRUMENTATION$$b25 / 56 = 0.446$$c2014$$dQ2$$eT2
000169493 591__ $$aENGINEERING, MULTIDISCIPLINARY$$b23 / 85 = 0.271$$c2014$$dQ2$$eT1
000169493 655_4 $$ainfo:eu-repo/semantics/article$$vinfo:eu-repo/semantics/acceptedVersion
000169493 700__ $$aOleaga, A
000169493 700__ $$aMendioroz, A
000169493 700__ $$0(orcid)0000-0002-3143-9097$$aOmella, A. J.$$uUniversidad de Zaragoza
000169493 700__ $$0(orcid)0000-0003-2183-2159$$aCelorrio, R.$$uUniversidad de Zaragoza
000169493 700__ $$aSalazar, A.
000169493 7102_ $$12005$$2595$$aUniversidad de Zaragoza$$bDpto. Matemática Aplicada$$cÁrea Matemática Aplicada
000169493 7102_ $$12005$$2X$$aUniversidad de Zaragoza$$bDpto. Matemática Aplicada$$cProy. investigación HMA
000169493 773__ $$g25, 11 (2014), 115601 [11 pp.]$$pMeas. sci. technol.$$tMEASUREMENT SCIENCE & TECHNOLOGY$$x0957-0233
000169493 8564_ $$s1522204$$uhttps://zaguan.unizar.es/record/169493/files/texto_completo.pdf$$yPostprint
000169493 8564_ $$s1413094$$uhttps://zaguan.unizar.es/record/169493/files/texto_completo.jpg?subformat=icon$$xicon$$yPostprint
000169493 909CO $$ooai:zaguan.unizar.es:169493$$particulos$$pdriver
000169493 951__ $$a2026-03-02-14:47:46
000169493 980__ $$aARTICLE