Boundary finite-element method coupling finite-element method for steady-state analyses of dam-reservoir systems / S. C. Fan in Journal of engineering mechanics, Vol. 134 N°2 (Fevrier 2008)  

Public ISBD [article]  inJournal of engineering mechanics > Vol. 134 N°2 (Fevrier 2008) . - pp.133–142. Titre : Boundary finite-element method coupling finite-element method for steady-state analyses of dam-reservoir systems Type de document : texte imprimé Auteurs : S. C. Fan, Auteur ; S. M. Li, Auteur Année de publication : 2008 Article en page(s) : pp.133–142. Note générale : Mécanique appliquée Langues : Anglais (eng) Mots-clés : Dams arch Reservoirs Coupling Finite element method Boundaries Résumé : The boundary finite-element method (BFEM) is extended for steady-state analyses of dam-reservoir system problems. In this study, the dam is assumed to be rigid and subjected to horizontal ground motions, and the liquid in the reservoir is assumed to be semiinfinite. The semiinfinite reservoir domain is partitioned into two subdomains: a near-field domain and a far-field domain. In it, the near-field domain is modeled by using the finite-element method (FEM), whereas the far-field domain is modeled by BFEM and is treated as a layered semiinfinite fluid domain. A BFEM/FEM coupling procedure is employed to solve the steady-state response of the reservoir. The coupling procedure is easy to implement and suitable for all frequencies, be it real or complex. The BFEM/FEM coupling procedure is validated in the frequency domain. Numerical results that are based on the present procedure are in good agreement with analytical and other available numerical solutions. ISSN : 0733-9399 En ligne : http://ascelibrary.org/doi/abs/10.1061/%28ASCE%290733-9399%282008%29134%3A2%2813 [...] [article] Boundary finite-element method coupling finite-element method for steady-state analyses of dam-reservoir systems [texte imprimé] / S. C. Fan, Auteur ; S. M. Li, Auteur . - 2008 . - pp.133–142. Mécanique appliquée Langues : Anglais (eng) in Journal of engineering mechanics > Vol. 134 N°2 (Fevrier 2008) . - pp.133–142. Mots-clés : Dams arch Reservoirs Coupling Finite element method Boundaries Résumé : The boundary finite-element method (BFEM) is extended for steady-state analyses of dam-reservoir system problems. In this study, the dam is assumed to be rigid and subjected to horizontal ground motions, and the liquid in the reservoir is assumed to be semiinfinite. The semiinfinite reservoir domain is partitioned into two subdomains: a near-field domain and a far-field domain. In it, the near-field domain is modeled by using the finite-element method (FEM), whereas the far-field domain is modeled by BFEM and is treated as a layered semiinfinite fluid domain. A BFEM/FEM coupling procedure is employed to solve the steady-state response of the reservoir. The coupling procedure is easy to implement and suitable for all frequencies, be it real or complex. The BFEM/FEM coupling procedure is validated in the frequency domain. Numerical results that are based on the present procedure are in good agreement with analytical and other available numerical solutions. ISSN : 0733-9399 En ligne : http://ascelibrary.org/doi/abs/10.1061/%28ASCE%290733-9399%282008%29134%3A2%2813 [...]

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Corrosion resistance of Zn–Ni/Ni and Ni/Zn–Ni compositionally modulated multilayer coating / J.-L. Chen in Materials and corrosion, Vol. 63 N° 7 (Juillet 2012)  

Public ISBD [article]  inMaterials and corrosion > Vol. 63 N° 7 (Juillet 2012) . - pp. 607–613 Titre : Corrosion resistance of Zn–Ni/Ni and Ni/Zn–Ni compositionally modulated multilayer coating Type de document : texte imprimé Auteurs : J.-L. Chen, Auteur ; J. H. Liu, Auteur ; S. M. Li, Auteur Année de publication : 2012 Article en page(s) : pp. 607–613 Note générale : Génie mécanique Langues : Anglais (eng) Mots-clés : Corrosion resistance  multilayer  Ni  Zn–Ni alloy Résumé : Zn–Ni/Ni and Ni/Zn–Ni compositionally modulated multilayer (CMM) coatings were prepared by dual-bath technique. The effects of layers number and sublayers order were studied. Specially, the effect of different sublayers thickness ratios with the same multilayer period (λ) on the corrosion resistance of the CMM coatings was investigated in detail. Results showed that the corrosion resistance of Ni/Zn–Ni (Zn–Ni alloy sublayer as the top layer) CMM coating was better than that of Zn–Ni/Ni (Ni sublayer as the top layer) CMM coating. The 6-layer CMM coating with the layer thickness ratio of Ni/Zn–Ni = 0.8:1.2 (λ = 2 µm) has the best corrosion resistance. En ligne : http://onlinelibrary.wiley.com/doi/10.1002/maco.201006022/abstract [article] Corrosion resistance of Zn–Ni/Ni and Ni/Zn–Ni compositionally modulated multilayer coating [texte imprimé] / J.-L. Chen, Auteur ; J. H. Liu, Auteur ; S. M. Li, Auteur . - 2012 . - pp. 607–613. Génie mécanique Langues : Anglais (eng) in Materials and corrosion > Vol. 63 N° 7 (Juillet 2012) . - pp. 607–613 Mots-clés : Corrosion resistance  multilayer  Ni  Zn–Ni alloy Résumé : Zn–Ni/Ni and Ni/Zn–Ni compositionally modulated multilayer (CMM) coatings were prepared by dual-bath technique. The effects of layers number and sublayers order were studied. Specially, the effect of different sublayers thickness ratios with the same multilayer period (λ) on the corrosion resistance of the CMM coatings was investigated in detail. Results showed that the corrosion resistance of Ni/Zn–Ni (Zn–Ni alloy sublayer as the top layer) CMM coating was better than that of Zn–Ni/Ni (Ni sublayer as the top layer) CMM coating. The 6-layer CMM coating with the layer thickness ratio of Ni/Zn–Ni = 0.8:1.2 (λ = 2 µm) has the best corrosion resistance. En ligne : http://onlinelibrary.wiley.com/doi/10.1002/maco.201006022/abstract

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