High temperature properties of state-change tooling materials / Brendan O'Toole in SAMPE JOURNAL, Vol. 44, N° 1 (01-02/2008)

[article]  inSAMPE JOURNAL > Vol. 44, N° 1 (01-02/2008) . - p. 42-52 Titre : High temperature properties of state-change tooling materials Type de document : texte imprimé Auteurs : Brendan O'Toole, Auteur ; Shahidur Rahman, Auteur ; Julio Malpica, Auteur ; Jagadeep Thota, Auteur ; Stacy Raagas, Auteur ; George Calvert, Auteur ; Kevin Cao, Auteur ; Linda Clements, Auteur Année de publication : 2008 Article en page(s) : p. 42-52 Note générale : Bibliogr. Langues : Américain (ame) Index. décimale : 668.4 Plastiques, vinyles Résumé : A porous state-change material has been developed as part of a reconfigurable tooling system. The primary form of this material consists of hollow glass microspheres suspended in a water based blinder. The material is hardened by applying vacuum and elevated temperatures to the liquid slurry, leaving a thin binder layer between microspheres that holds them together. Mechanical and thermal characterization data for this material has been previously reported for relatively low temperature applications. There is interest in using this tooling system for the fabrication of the polymer composite structures that require processing temperatures in the range of 400°C (750°F). The material must withstand the thermal-mechanical loading experienced during the fabrication process, including the thermal cycling. Compression and flexural mechanical properties and coefficient of thermal expansion are determined at temperatures up to 400°C (750°F). Room temperature properties of the material are also determined after thermal cycling up to the same temperature. Note de contenu : - Density and porosity - Flexural properties - Thermal mechanical analysis (TMA) Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=23353 [article]

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Structural response of blast loaded composite containment vessels / Brendan O'Toole in SAMPE JOURNAL, Vol. 42, N° 4 (07-08/2006)

[article]  inSAMPE JOURNAL > Vol. 42, N° 4 (07-08/2006) . - p. 6-13 Titre : Structural response of blast loaded composite containment vessels Type de document : texte imprimé Auteurs : Brendan O'Toole, Auteur ; Mohamed B. Trabia, Auteur ; Jagadeep Thota, Auteur ; Trevor Wilcox, Auteur ; Kumarswamy K. Nakelswamy, Auteur Année de publication : 2006 Article en page(s) : p. 6-13 Note générale : Bibliogr. Langues : Américain (ame) Index. décimale : 668.4 Plastiques, vinyles Résumé : The development of efficient explosion resistant containers requires knowledge of dynamic material properties and the ability to simulate both the explosive loading and the corresponding structural response. A lightweight, transportable containment vessel could be used as an integral part of the response to bomb-related terrorist activities. Several composite vessel designs have been developed by the Russian Federal Nuclear Center (RFNC-VNIIEF) and explosive experiments have been performed on open ended cylinders for the purpose of benchmarking analysis methods. The objective of the work presented here is to determine the mechanical properties of the cylinder materials and to investigate different methods for computational simulation of the cylinder response to blast loading. The open ended cylinders are made from a basalt fiber-epoxy composite material with and without a steel inner liner. Computational simulation is performed using LS-DYNA. The predicted response of the composite structure matches experimental data closely for three different test cylinder configurations. Note de contenu : - CYLINDRICAL BLAST EXPERIMENTS - MATERIAL CHARACTERIZATION : General - Stainless steel properties - Basalt fiber/epoxy composite properties - COMPUTATIONAL SIMULATION : General modeling procedure - Explosive modeling procedure Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=23469 [article]

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