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Early detection of looseness in bovine hides using ultrasonic imaging / Hannah C. Wells in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXI, N° 3 (03/2016)
[article]
Titre : Early detection of looseness in bovine hides using ultrasonic imaging Type de document : texte imprimé Auteurs : Hannah C. Wells, Auteur ; Geoff Holmes, Auteur ; Richard G. Haverkamp, Auteur Année de publication : 2016 Article en page(s) : p. 107-112 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Cuirs et peaux -- Analyse
Cuirs et peaux -- Défauts
Détection de défauts (Ingénierie)
Imagerie ultrasonore
Peaux creusesIndex. décimale : 675 Technologie du cuir et de la fourrure Résumé : The processing of bovine hides to leather results in a significant proportion of defective leather known as loose leather. It has not previously been possible to recognize hides that may produce loose leather. Hides were processed through to leather with samples retained at the pickle, wet blue and crust leather stages with material that resulted in loose leather compared with that resulting in tight leather, using ultrasonic imaging. The loose precursor is characterized by a lower density of material in the mid grain layer. The looseness is quantified by amplitude differences in ultrasound line scans or cross-sectional area scans between loose leather and tight leather with 2-4 times the amount of low intensity area in loose leather at all three process stages. This enables detection of hides that will result in loose leather and may enable unsuitable hides to be diverted to other process streams to save substantial processing costs. Note de contenu : - Sample selection
- Leather preparation
- Looseness evaluation
- Ultrasonic imaging
- Scanning electron microscopy
- Sample detection
- Ultrasonic images
- Scanning electron microscopyEn ligne : https://drive.google.com/file/d/1HxuzfKlZNnYq_HBFfMsAEn0o3ryD2U7J/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=25746
in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. CXI, N° 3 (03/2016) . - p. 107-112[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 17998 - Périodique Bibliothèque principale Documentaires Disponible Elastic properties of orthotropic composites using the US polar scan method / Mathias Kersemans in JEC COMPOSITES MAGAZINE, N° 75 (08-09/2012)
[article]
Titre : Elastic properties of orthotropic composites using the US polar scan method Type de document : texte imprimé Auteurs : Mathias Kersemans, Auteur ; Nicolas Lammens, Auteur ; Geert Luyckx, Auteur ; Joris Degrieck, Auteur ; Wim Van Paepegem, Auteur Année de publication : 2012 Article en page(s) : p. 48-52 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Composites
Contrôle non destructif
Imagerie ultrasonore
Matériaux -- Fatigue
MesureIndex. décimale : 620.11 Matériaux (propriétés, résistance) Résumé : Due to the increasing use of composite materials in critical structural applications demanding a high strength-to-weight ratio, reliable evaluation tools are now more than ever necessary. Ultrasound is well known in the field of non-destructive testing and evaluation (NDTetE) and classical ultrasonic C-scan techniques have already proved their usefulness in visualizing defects, delaminations, etc. However, due to their inherent limitations in quantitative characterization, the quest for more sophisticated NDTetE methods to monitor complex damage mechanisms is a significant challenge in current research since one of the most critical degradation mechanisms of composite materials involves fatigue, which is associate with a localized reduction of the material stiffness. The very promising ultrasonic polar scan technique is investigated and discussed in this study. Note de contenu : RESULTS AND DISCUSSION : Polar scan and forward modelling - Polar scan and inverse modelling
- EXTENSIONS OF THE POLAR SCAN PRINCIPLE : Backscatter polar scan - Gradient polar scanPermalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=16277
in JEC COMPOSITES MAGAZINE > N° 75 (08-09/2012) . - p. 48-52[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 14124 - Périodique Bibliothèque principale Documentaires Disponible Next generation acoustography ultrasonic NDI for advanced composite materials and structure / J. S. Sandhu in SAMPE JOURNAL, Vol. 46, N° 1 (01-02/2010)
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Titre : Next generation acoustography ultrasonic NDI for advanced composite materials and structure Type de document : texte imprimé Auteurs : J. S. Sandhu, Auteur Année de publication : 2010 Article en page(s) : p. 6-12 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Acousto-optique
Composites
Contrôle non destructif
Imagerie ultrasonore
UltrasonsIndex. décimale : 668.4 Plastiques, vinyles Résumé : Acoustography differs from conventional ultrasonic testing in that test objects are inspected in full field, analogously to real time x-ray imaging. The approach uses a novel, super high resolution large area acousto-optic (AO) sensor, which allows image formation through simple ultrasound shadow casting, analogous to x-ray image formation. Recent improvements in AO sensor technology have greatly expanded acoustography's nondestructive inspection (NDI) abilities. These recent developments offerssignificant advantages over conventional point-by-point ultrasonic scanning methods, such as wide area inspection, high resolution, circumvention of bulky mechanical scanning apparatuses, very user friendly allowing use and interpretation of data by low skill level operators and simple set-up, thus making acoustography very efficient and a powerful inspection tool during manufacturing. In addition, acoustography is also being developed so that it can be adapted for field inspection use. Composite materials are widely used in aerospace structures for their exceptionally high specific strength to weight ratios. Acoustography wes used to inspect a variety of impact damaged carbon/epoxy composite coupon samples, typically used in aerospace structures. In addition, US Army helicopter main rotor blade sections with induced field damage were also inspected. These structures include a variety of materials,such as a primary metal inner load carrying beam structure (spar), a Nomex honeycomb core region sandwiched between thin glass/epoxy skins and all components adhesively bonded. Induced damage to the blade sections simulated typical field threats, such as, low velocity ballistic impacts from projectiles, fragments or debris, as well as, simulated maintenance tool drops causing localized crush core damage to the honeycomb region. Acoustography inspection results will be presented side-by-side with conventional ultrasonic inspection results. Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=8148
in SAMPE JOURNAL > Vol. 46, N° 1 (01-02/2010) . - p. 6-12[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 011872 - Périodique Bibliothèque principale Documentaires Disponible Non-destructive inspection technologies for VARTM composite structures / Y. Aoki in SAMPE JOURNAL, Vol. 46, N° 1 (01-02/2010)
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Titre : Non-destructive inspection technologies for VARTM composite structures Type de document : texte imprimé Auteurs : Y. Aoki, Auteur ; Y. Nagao, Auteur ; M. Sugimoto, Auteur Année de publication : 2010 Article en page(s) : p. 22-27 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Composites
Contrôle non destructif
Imagerie ultrasonore
Moulage par transfert de résine sous vide
UltrasonsIndex. décimale : 668.4 Plastiques, vinyles Résumé : This article describes some experimental findings obtained from NDI results of VARTM aircraft structures. Inherent inspection difficulties due to the VARTM process, such as fiber waviness, surface creases and wrinkles, are discussed and some technical suggestions are given to overcome them. It is demonstrated that pulsed thermography and 3-D (Array) ultrasonic system are applicable for the inspection of the structure manufactured by VARTM process. 3-D ultrasonic system provides much higher quality NDI results compared with conventional ultrasonic system. Furthermore, this systemshows the ability to inspect the thickness change or complex shape part in highly integral VARTM structure. Pulsed thermography is an effective NDI tool to evaluate the depth and the area of the flaw especially in large area because of its fast inspection rate and easy operation. Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=8149
in SAMPE JOURNAL > Vol. 46, N° 1 (01-02/2010) . - p. 22-27[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 011872 - Périodique Bibliothèque principale Documentaires Disponible The hollow space formation in the light of ultrasound / Christian Hopmann in KUNSTSTOFFE INTERNATIONAL, Vol. 102, N° 3 (03/2012)
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Titre : The hollow space formation in the light of ultrasound Type de document : texte imprimé Auteurs : Christian Hopmann, Auteur ; Sebastian Becker, Auteur Année de publication : 2012 Article en page(s) : p. 16-19 Langues : Anglais (eng) Catégories : Détection de défauts (Ingénierie)
Imagerie ultrasonore
Matières plastiques -- Moulage par injection
Matières plastiques -- Moulage par injection assisté par gaz
Matières plastiques -- Moulage par injection assistée par eau
UltrasonsIndex. décimale : 668.4 Plastiques, vinyles Résumé : Fluid-Assisted Injection Molding - There are no online measuring processes for gas and water-assisted injection molding that both describe the process and record external properties of the part, such as residual wall thickness. A nondestructive method for analyzing the shaping process in real time is diagnostic ultrasound measuring. It allows early detection of part defects such as cavities or water entrapments. Note de contenu : - Two suitable pulse processes
- Sound waves travel through the cavity
- The process fingerprints
- Registering the residual wall thickness onlinePermalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=16226
in KUNSTSTOFFE INTERNATIONAL > Vol. 102, N° 3 (03/2012) . - p. 16-19[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 13766 - Périodique Bibliothèque principale Documentaires Disponible Ultrasonic nondestructive evaluation of composite materials and structures / David K. Hsu in SAMPE JOURNAL, Vol. 46, N° 1 (01-02/2010)
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