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Detecting multiple open cracks in elastic beams by static tests / Salvatore Caddemi in Journal of engineering mechanics, Vol. 137 N° 2 (Fevrier 2011) 

Public ISBD [article]  in Journal of engineering mechanics > Vol. 137 N° 2 (Fevrier 2011) . - pp.113-124 Titre : Detecting multiple open cracks in elastic beams by static tests Type de document : texte imprimé Auteurs : Salvatore Caddemi, Auteur ; Morassi, Antonino, Auteur Année de publication : 2011 Article en page(s) : pp.113-124 Note générale : Mécanique appliquée Langues : Anglais (eng) Mots-clés : Damage  detection  Beams  Static  loads  Cracks  Inverse  problems Résumé : This paper concerns with the identification of multiple open cracks in a beam by measurements of the damage-induced variations in the static deflection of the beam under a prescribed load condition. Each crack is simulated by an equivalent linear spring connecting the two adjacent segments of beam. Sufficient conditions on the static measurements which allow for the unique identification of the damage are presented and discussed for nonuniform beams under some ideal boundary conditions. The inverse analysis is based on an explicit expression of the crack-induced variation in the deflection of the beam under a given load distribution and it provides exact closed-form expressions of position and severity of the cracks in terms of the measured data. The theoretical results are confirmed by a comparison with static tests carried out on a steel beam with localized damages. REFERENCE : 0733-9399 DEWEY : 620.1 En ligne : http://ascelibrary.org/emo/resource/1/jenmdt/v137/i2/p113_s1?isAuthorized=no [article] Detecting multiple open cracks in elastic beams by static tests [texte imprimé] / Salvatore Caddemi, Auteur ; Morassi, Antonino, Auteur . - 2011 . - pp.113-124. Mécanique appliquée Langues : Anglais (eng) in Journal of engineering mechanics > Vol. 137 N° 2 (Fevrier 2011) . - pp.113-124 Mots-clés : Damage  detection  Beams  Static  loads  Cracks  Inverse  problems Résumé : This paper concerns with the identification of multiple open cracks in a beam by measurements of the damage-induced variations in the static deflection of the beam under a prescribed load condition. Each crack is simulated by an equivalent linear spring connecting the two adjacent segments of beam. Sufficient conditions on the static measurements which allow for the unique identification of the damage are presented and discussed for nonuniform beams under some ideal boundary conditions. The inverse analysis is based on an explicit expression of the crack-induced variation in the deflection of the beam under a given load distribution and it provides exact closed-form expressions of position and severity of the cracks in terms of the measured data. The theoretical results are confirmed by a comparison with static tests carried out on a steel beam with localized damages. REFERENCE : 0733-9399 DEWEY : 620.1 En ligne : http://ascelibrary.org/emo/resource/1/jenmdt/v137/i2/p113_s1?isAuthorized=no