Documents disponibles écrits par cet auteur

Finite-element calculation of elastodynamic stress intensity factors along a 3D nonplanar curved crack / Chang, Jui-Hung in Journal of engineering mechanics, Vol. 135 N° 6 (Juin 2009) 

Public ISBD [article]  in Journal of engineering mechanics > Vol. 135 N° 6 (Juin 2009) . - pp. 585-590 Titre : Finite-element calculation of elastodynamic stress intensity factors along a 3D nonplanar curved crack Type de document : texte imprimé Auteurs : Chang, Jui-Hung, Auteur ; Deh-Juan Wu, Auteur Article en page(s) : pp. 585-590 Note générale : Mécanique appliquée Langues : Anglais (eng) Mots-clés : Cracking  Elasticity  Dynamic  response  Three-dimensional  analysis  Finite  element  method  Stress. Résumé : A numerical procedure is presented for calculation of the mixed-mode elastodynamic stress intensity factors for a stationary three-dimensional curved crack with nonplanar surfaces. The computational scheme is developed by modifying the concept of the elastodynamic Jk integrals, which are shown to be surface independent in a modified sense. As the near-front region needs to be included in the calculation, special treatment is thus addressed to modeling the elastodynamic singular behavior. Neither extra auxiliary solutions nor singular finite elements are required for the computation DEWEY : 620.1 ISSN : 0733-9399 En ligne : http://ascelibrary.aip.org/getabs/servlet/GetabsServlet?prog=normal&id=JENMDT000 [...] [article] Finite-element calculation of elastodynamic stress intensity factors along a 3D nonplanar curved crack [texte imprimé] / Chang, Jui-Hung, Auteur ; Deh-Juan Wu, Auteur . - pp. 585-590. Mécanique appliquée Langues : Anglais (eng) in Journal of engineering mechanics > Vol. 135 N° 6 (Juin 2009) . - pp. 585-590 Mots-clés : Cracking  Elasticity  Dynamic  response  Three-dimensional  analysis  Finite  element  method  Stress. Résumé : A numerical procedure is presented for calculation of the mixed-mode elastodynamic stress intensity factors for a stationary three-dimensional curved crack with nonplanar surfaces. The computational scheme is developed by modifying the concept of the elastodynamic Jk integrals, which are shown to be surface independent in a modified sense. As the near-front region needs to be included in the calculation, special treatment is thus addressed to modeling the elastodynamic singular behavior. Neither extra auxiliary solutions nor singular finite elements are required for the computation DEWEY : 620.1 ISSN : 0733-9399 En ligne : http://ascelibrary.aip.org/getabs/servlet/GetabsServlet?prog=normal&id=JENMDT000 [...]

Study on several mesoporous materials catalysts applied to the removal of trace olefins from aromatics and commercial sidestream tests / Chang, Chih-Chen in Industrial & engineering chemistry research, Vol. 48 N° 23 (Décembre 2009) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 48 N° 23 (Décembre 2009) . - pp. 10359–10363 Titre : Study on several mesoporous materials catalysts applied to the removal of trace olefins from aromatics and commercial sidestream tests Type de document : texte imprimé Auteurs : Chang, Chih-Chen, Auteur ; Deh-Juan Wu, Auteur ; Xian-song Zeng, Auteur Année de publication : 2010 Article en page(s) : pp. 10359–10363 Note générale : Industrial chemistry Langues : Anglais (eng) Mots-clés : Study--Several--Mesoporous--Materials--Catalysts--Applied--Removal  Trace  Olefins--Aromatics--Commercial--Sidestream  Tests Résumé : Deep removal of trace olefins from aromatics using mesoporous materials and modified mesoporous materials was studied with regard to the removal of trace olefins from aromatic hydrocarbons. The mesoporous materials and the modified mesoporous molecular sieve materials were characterized by X-ray diffraction and Fourier transform infrared (FT-IR) spectroscopy. Under the commercial sidestream test, the effects of four types of mesoporous materials, with regard to the removal of olefins from the aromatics, were evaluated. The result showed that the mesoporous materials that had surface areas larger than 300 m2/g and modified with AlCl3 were best, with regard to the effect on the removal of olefins from aromatics. The FT-IR results showed that the modifier could increase the concentration of weak Lewis acid of mesoporous materials and obviously enhance the effect of removing olefins and prolonging the reaction time. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie901062c [article] Study on several mesoporous materials catalysts applied to the removal of trace olefins from aromatics and commercial sidestream tests [texte imprimé] / Chang, Chih-Chen, Auteur ; Deh-Juan Wu, Auteur ; Xian-song Zeng, Auteur . - 2010 . - pp. 10359–10363. Industrial chemistry Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 48 N° 23 (Décembre 2009) . - pp. 10359–10363 Mots-clés : Study--Several--Mesoporous--Materials--Catalysts--Applied--Removal  Trace  Olefins--Aromatics--Commercial--Sidestream  Tests Résumé : Deep removal of trace olefins from aromatics using mesoporous materials and modified mesoporous materials was studied with regard to the removal of trace olefins from aromatic hydrocarbons. The mesoporous materials and the modified mesoporous molecular sieve materials were characterized by X-ray diffraction and Fourier transform infrared (FT-IR) spectroscopy. Under the commercial sidestream test, the effects of four types of mesoporous materials, with regard to the removal of olefins from the aromatics, were evaluated. The result showed that the mesoporous materials that had surface areas larger than 300 m2/g and modified with AlCl3 were best, with regard to the effect on the removal of olefins from aromatics. The FT-IR results showed that the modifier could increase the concentration of weak Lewis acid of mesoporous materials and obviously enhance the effect of removing olefins and prolonging the reaction time. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie901062c