Articles de revista: Enviaments recents

Ara es mostren els items 25-36 de 125

    • Experimental validation of an FSW model with an enhanced friction law: application to a threaded cylindrical pin tool 

      Dialamishabankareh, Narges; Cervera Ruiz, Miguel; Chiumenti, Michele; Segatori, A.; Osikowicz, W. (MDPI AG, 2017-11)
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      Accés obert
      This work adopts a fast and accurate two-stage computational strategy for the analysis of FSW (Friction stir welding) processes using threaded cylindrical pin tools. The coupled thermo-mechanical problem is equipped with ...

    • A computational multiscale homogenization framework accounting for inertial effects: application to acoustic metamaterials modelling 

      Roca Cazorla, David; Lloberas Valls, Oriol; Cante Terán, Juan Carlos; Oliver Olivella, Xavier (2018-03)
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      Accés obert
      A framework, based on an extended Hill–Mandel principle accounting for inertial effects (Multiscale Virtual Work principle), is developed for application to acoustic problems in the context of metamaterials modelling. The ...

    • Computational material design for acoustic cloaking 

      Méndez, Carlos Alberto; Podestá, J.M.; Lloberas Valls, Oriol; Toro, Sebastian; Huespe, Alfredo Edmundo; Oliver Olivella, Xavier (John Wiley & Sons, 2017-12)
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      Accés obert
      A topology optimization technique based on the topological derivative and the level set function is utilized to design/synthesize the micro-structure of a pentamode material for an acoustic cloaking device. The technique ...

    • Performance of mixed formulations for the particle finite element method in soil mechanics problems 

      Monforte, LLuís; Carbonell Puigbó, Josep Maria; Arroyo Alvarez de Toledo, Marcos; Gens Solé, Antonio (Springer, 2017-07)
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      Accés obert
      This paper presents a computational framework for the numerical analysis of fluid-saturated porous media at large strains. The proposal relies, on one hand, on the particle finite element method (PFEM), known for its ...

    • Holistic disaster risk evaluation for the urban risk management plan of Manizales, Colombia 

      Carreño Tibaduiza, Martha Liliana; Cardona Arboleda, Omar Dario; Barbat Barbat, Horia Alejandro; Suarez, Dora Catalina; Perez, Maria del Pilar; Narvaez, Lizardo (Springer, 2017-09)
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      Accés obert
      Disaster risk depends on both the physical vulnerability and a wide range of social, economic, and environmental aspects of a society. For a better risk understanding, a holistic or integrated perspective was considered ...

    • Finite element modeling of quasi-brittle cracks in 2D and 3D with enhanced strain accuracy 

      Cervera Ruiz, Miguel; Barbat Vlad, Gabriel; Chiumenti, Michele (2017-11)
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      Accés obert
      This paper discusses the finite element modeling of cracking in quasi-brittle materials. The problem is addressed via a mixed strain/displacement finite element formulation and an isotropic damage constitutive model. The ...

    • Numerical modelling and experimental validation in Selective Laser Melting 

      Chiumenti, Michele; Miranda Neiva, Eric; Salsi, Emilio; Cervera Ruiz, Miguel; Badia, Santiago; Moya, Joan; Chen, Zhuoer; Lee, Caroline; Davies, Christopher (2017-12)
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      Accés obert
      In this work a finite-element framework for the numerical simulation of the heat transfer analysis of additive manufacturing processes by powder-bed technologies, such as Selective Laser Melting, is presented. These kind ...

    • Continuous chip formation in metal cutting processes using the Particle Finite Element Method (PFEM) 

      Rodríguez, J. M.; Carbonell Puigbó, Josep Maria; Cante Terán, Juan Carlos; Oliver Olivella, Xavier (2017-08-01)
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      Accés obert
      This paper presents a study on the metal cutting simulation with a particular numerical technique, the Particle Finite Element Method (PFEM) with a new modified time integration algorithm and incorporating a contact algorithm ...

    • Damage analysis of masonry structures subjected to rockfalls 

      Mavrouli, Olga Christina; Giannopoulos, P. G.; Carbonell Puigbó, Josep Maria; Syrmakezis, Costas (2017-06-01)
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      Accés obert
      Masonry structures present substantial vulnerability to rockfalls. The methodologies for the damage quantification of masonry structures subjected to rockfalls are scarce. An analytical procedure for the damage assessment ...

    • An improved enrichment method for weak discontinuities for thermal problems 

      Martí, Julio Marcelo; Ortega, Ernesto; Idelsohn Barg, Sergio Rodolfo (2017-07)
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      Accés obert
      The purpose of this paper is to propose a new elemental enrichment technique to improve the accuracy of the simulations of thermal problems containing weak discontinuities. Design/methodology/approach - The enrichment is ...

    • Enhanced friction model for Friction Stir Welding (FSW) analysis: simulation and experimental validation 

      Dialami, Narges; Chiumenti, Michele; Cervera Ruiz, Miguel; Segatori, A.; Osikowicz, W. (2017-11)
      Article
      Accés obert
      Friction is one of the main heat generation mechanisms in Friction Stir Welding (FSW). This phenomenon occurs between the pin and the workpiece as the rotating tool moves along the weld line. An accurate friction model is ...

    • Three embedded techniques for finite element heat flow problem with embedded discontinuities 

      Davari, Masud; Rossi, Riccardo; Dadvand, Pooyan (2017-06)
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      Accés obert
      The present paper explores the solution of a heat conduction problem considering discontinuities embedded within the mesh and aligned at arbitrary angles with respect to the mesh edges. Three alternative approaches are ...