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Sökning: WFRF:(Klisinski Marek)

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  • Karlsson, Tomas, et al. (författare)
  • Finite element simulation of granular material flow in plane silos with complicated geometry
  • 1998
  • Ingår i: Powder Technology. - 0032-5910 .- 1873-328X. ; 99:1, s. 29-39
  • Tidskriftsartikel (refereegranskat)abstract
    • A model with few material parameters is proposed for finite element simulation of the transient flow of cohesionless granular materials in silos. The constitutive model used is essentially a fluid model and, consequently, it is best established in the Eulerian format. The model allows the simulation of initial stress transients at the beginning of the discharging process. After long time, when the solution approaches steady state, the flow pattern that is developed represents either a mass or funnel flow situation. Numerical examples of transient stress fields are given, and the flow patterns in advanced silo geometries are studied. The numerical results are in good agreement with analytical solutions and experiments known from the literature
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  • Klisinski, Marek, et al. (författare)
  • Discussion on application of piece-wise linear weight functions in 2D contact problems
  • 2003
  • Ingår i: Computer Assisted Mechanics and Engineering Sciences. - 1232-308X. ; 10:3, s. 321-337
  • Tidskriftsartikel (refereegranskat)abstract
    • Standard higher order finite elements often perform unsatisfactory in contact problems. The major difficulties are caused by uneven distribution of nodal forces resulting in oscillating contact pressures. The paper presents a new approach that eliminates this drawback. The weight functions are chosen in such a way that even distributions of nodal forces are obtained. It is achieved by applying piece-wise linear functions. Two new 2D isoparametric quadratic elements are derived: 6-node triangle and 8-node quadrilateral, and tested in many examples. The new elements have unsymmetric stiffness matrices, but the provided examples show their good performance in contact problems
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  • Klisinski, Marek, 1956, et al. (författare)
  • Finite Element with Inner Softening Band
  • 1991
  • Ingår i: ASCE, Journal of Engineering Mechanics. ; 117:3, s. pp. 576-588
  • Tidskriftsartikel (refereegranskat)
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  • Resultat 1-10 av 33

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