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1 – 2 of 2Renato Zona, Luca Esposito, Simone Palladino and Vincenzo Minutolo
Heterogeneous and micro-structured materials have been the object of multiscale and homogenization techniques aimed at recognizing the elastic properties of the equivalent…
Abstract
Purpose
Heterogeneous and micro-structured materials have been the object of multiscale and homogenization techniques aimed at recognizing the elastic properties of the equivalent continuum. The proposed investigation deals with the mechanical characterization of the heterogeneous material structured metamaterials through analyzing the ultimate strength using the limit analysis of the Representative Volume Element (RVE). To get the desired material strength, a novel finite element formulation based on the derivation of self-equilibrated solutions through the finite elements devoted to calculating the lower bound theorem has been implemented together with the limit analysis in Melàn’s formulation.
Design/methodology/approach
The finite element formulation is based on discrete mapping of Volterra dislocations in the structure using isoparametric representation. Using standard finite element techniques, the linear operator V, which relates the self-equilibrated internal solicitation to displacement-like nodal parameters, has been built through finite element discretization of displacement and strain.
Findings
The proposed work presented an elastic homogenization of the mechanical properties of an elementary cell with a geometry known in the literature, the isotropic truss. The matrix of elastic constants was calculated by subjecting the RVE to numerical load tests, simulated with a commercial FEM calculation code. This step showed the dependence of the isotropy properties, verified with Zener theory, on the density of the RVE. The isotropy condition of the material is only achieved for certain section ratios between body-centered cubic (BCC) and face-centered cubic (FCC), neglecting flexural effects at the nodes. The density that satisfies Zener’s conditions represents the isotropic geomatics of the isotropic truss.
Originality/value
For the isotropic case, the VFEM procedure was used to evaluate the isotropy of the limit domain and was compared with the Mises–Schleicher limit domain. The evaluation of residual ductility and dissipation energy allowed a measurement parameter for the limit anisotropy to be defined. The novelty of the proposal consisted in the formulation of both the linearized and the nonlinear limit locus of the material; hence, it furnished the starting point for further limit analysis of the structures whose elementary volume has been described through the proposed approach.
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Batuhan Aktepe and Barış Demirci
The main objective of this research is to unravel and analyze emergent technologies that are altering and improving the event industry. The study seeks to recognize the most vital…
Abstract
Purpose
The main objective of this research is to unravel and analyze emergent technologies that are altering and improving the event industry. The study seeks to recognize the most vital technological advancement, uses and effects on event preparation, management and participant experience.
Design/methodology/approach
In this study, a narrative literature review method was used to examine emerging technologies in event management.
Findings
The research reveals that the emerging technologies examined in the articles affect and transform the event industry differently. Many of these technologies are currently being used in the event industry and are likely to be utilized in the coming years.
Originality/value
Numerous studies in the literature are related to the research field. However, as technology evolves rapidly, it is necessary to repeat studies at regular intervals. This article contributes to the literature by tracking new technological developments in the event industry.
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