IRIS - UNIRSM (Univ. degli Studi della Repubblica di San Marino)
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Finite element solution of vibrations and buckling of laminated thin plates in hygro-thermal environment based on strain gradient theory
No full textThe paper aims to develop a finite element methodology to deal with vibrations and buckling of laminated thin plates subjected to thermal and hygroscopic effects, once a second-order strain gradient theory is included to overcome the limitations of conventional elasticity and to capture nonlocal phenomena. The numerical scheme takes advantage of Hermite approximation for both membrane and bending primary variables, since the strain gradient introduces higher-order derivatives of the nodal displacements. Its versatility is proven by dealing with general lamination schemes and arbitrary boundary conditions. The analyzed configurations cannot be solved analytically
On the mapping procedure based on higher-order Hermite polynomials for laminated thin plates with arbitrary domains in gradient elasticity
No full textThe article presents a finite element mapping procedure for the coordinate change via higher-order derivatives to compute the fundamental matrices of laminated thin plates with arbitrary domains in gradient elasticity. In this context, the approximate solution requires Hermite interpolating functions. Therefore, conforming and nonconforming formulations are needed for both membrane and bending degrees of freedom, which require respectively C1 and C2 continuity. The aim of the current procedure is the possibility to remove the limitations related to the regular rectangular shape which typically charac-terizes this kind of elements and to introduce arbitrary distortions, discussing the influence of structured and unstructured meshes. The accuracy and conver-gence features of the methodology are presented through some numerical tests and compared to relevant literature
AtelieRwanda, design e fibre vegetali. Bilancio di un’esperienza
No full textIl contributo ripercorre le tappe di avvio del progetto di ricerca AtelierRwanda per verificarne a posteriori gli aspetti metodologici e le ricadute socio-economiche sulle comunità locali. AtelierRwanda, Tradition and Innovation in Vegetable Fiber’s Design nasce con l’intenzione di sperimentare nuovi modelli di sviluppo sostenibile attraverso la formazione, la ricerca e l’individuazione di processi innovativi da applicare localmente. Grazie alla creazione di un laboratorio di ricerca permanente a Kigali in Ruanda, e al coinvolgimento diretto delle Istituzioni e delle associazioni locali, il progetto ha verificato le potenzialità dell’approccio sistemico a un’innovazione che consideri gli aspetti sociali, ambientali, etici, culturali ed economici di una comunità.The contribution retrace the research project AtelierRwanda starting phases to verify ex post the methodological aspect and socio- economic impacts on local communities. AtelierRwanda, Tradition and Innovation in Vegetable Fiber’s Design has born with the intention to experiment new sustainable developing models through education, research and identification of innovative processes to be applied locally. Through the creation of a permanent research lab in Kigali, Rwanda, and the direct involvement of local institutions and associations, the project tested the potential of the systemic approach to an innovation that takes into account the social, environmental, ethical, cultural and economic aspects of a community
La rilevazione della gravità del quadro neuropsicologico attraverso gli indici della WISC-IV
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