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Increased safety for autonomous vehicles in INTERNATIONAL SURFACE TECHNOLOGY (IST), Vol. 13, N° 3 (2020)
[article]
Titre : Increased safety for autonomous vehicles Type de document : texte imprimé Année de publication : 2020 Article en page(s) : p. 20-21 Langues : Anglais (eng) Catégories : Automobiles -- Revêtements:Automobiles -- Peinture Tags : 'Peinture automobile' 'Couleur foncée' 'revêtement spécial' 'Détection radar' 'Longueur d'onde' Réflectivité Index. décimale : 667.9 Revêtements et enduits Résumé : Conventional vehicle coatings and substrates often interfere with the signals from lidar sensors. Special coating systems that also reflect the relevant lidar wavelengths help to improve signal detection and increase the safety of autonomous vehicles. Note de contenu : - Maximising radar performance
- Identifying dark-coloured vehicles more easily
- Radar sensors behind vehicle panels
- Fig. 1 : Using a normal imaging method there are no visual differences between the control vehicle with standard high-gloss black paintwork and the NIR test vehicle with a modified coating
- Fig. 2 : The image of the NIR vehicle is much more complete and much brighter using near-infrared imaging (lidar wavelength) than the control vehicle with standard high-gloss black paintwork
- Fig. 3 : The NIR coating allows the vehicle to be detected from around 20 metres further awayPermalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=35769
in INTERNATIONAL SURFACE TECHNOLOGY (IST) > Vol. 13, N° 3 (2020) . - p. 20-21[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 21916 - Périodique Bibliothèque principale Documentaires Disponible Influence of processing parameters on the fiber length and impact properties of injection molded long glass fiber reinforced polypropylene / M. Rohde in INTERNATIONAL POLYMER PROCESSING, Vol. XXVI, N° 3 (07/2011)
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Titre : Influence of processing parameters on the fiber length and impact properties of injection molded long glass fiber reinforced polypropylene Type de document : texte imprimé Auteurs : M. Rohde, Auteur ; A. Ebel, Auteur ; Felipe Wolff Fabris, Auteur ; Volker Altstädt, Auteur Année de publication : 2011 Article en page(s) : p. 292-303 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Composites à fibres de verre -- Moulage par injection
Composites thermoplastiques -- Moulage par injection
PolypropylèneTags : 'Composites fibres verre' Polypropylene 'Analyse paramètre moulage' 'Etude impact' 'Longueur fibre' Index. décimale : 668.4 Plastiques, vinyles Résumé : Injection molding of long fiber-reinforced thermoplastics is a well-established method in automotive industry to produce high quality structural parts in mass production without the need of further finishing, where the performance is strongly dependent on the fiber length. It is known that the processing parameters have to be carefully chosen as they directly influence the final fiber length and can therefore have a negative effect on the resulting mechanical properties of the part. Particularly in terms of impact behavior, the fiber length is seen as a key factor. The aim of the present work is to quantify the effects of the injection molding parameters on the impact behavior of long fiber reinforced compounds. In a first step the resulting fiber length of injection molded glass fiber reinforced polypropylene is analyzed as a function of the injection velocity, holding pressure, revolution speed and back pressure. The single steps of fiber length analysis are carefully investigated in terms of feasibility and accuracy, in order to assure that a reproducible and reliable test method is employed. Subsequently, the impact behavior of the PP-GF compounds is quantified by falling dart experiments, and the results are then correlated to the fiber length and the processing parameters to establish a fundamental processing-structure-property relationship. The investigation of the fiber length analysis shows that a high pyrolysis temperature leads to embrittlement of the glass fibers and a decrease of tensile strength of the single fibers. This may consequently lead to incorrect characterization of the fiber length due to fiber breakage. The results of the statistical investigation of the processing parameters indicate a significant influence of the back pressure on both impact energy and fiber length. Note de contenu : - EXPERIMENTAL : Materials - Fiber length - Single fiber tensile testing - Injection molding - Mechanical characterization - Characterization of morphology
- RESULTS AND DISCUSSION : Fiber length analysis - Impact properties and fiber lengthDOI : 10.3139/217.2442 En ligne : https://drive.google.com/file/d/1T2PBcVKE0DAN6yOLE16GbpGa8joFaFbv/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=12408
in INTERNATIONAL POLYMER PROCESSING > Vol. XXVI, N° 3 (07/2011) . - p. 292-303[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 013159 - Périodique Bibliothèque principale Documentaires Disponible