Computational Mechanics
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On a consistent field transfer in non linear inelastic analysis and ultimate load computation
Computational Mechanics - Tập 42 - Trang 213-226 - 2007
In this work we propose a field transfer operator for remeshing carried out in the course of incremental analysis of a non linear inelastic behavior. The proposed procedure is geared towards the ultimate load computation of a complex structure, where we choose the appropriate mesh grading for each different phase of computations, starting with a coarse mesh for the initial linear response and goin......
Computational modeling of fiber flow during casting of fresh concrete
Computational Mechanics - Tập 63 - Trang 1111-1129 - 2018
The Folgar–Tucker fiber orientation model coupled with weakly compressible Smoothed Particle Hydrodynamics is used to simulate the process of casting of fiber reinforced concrete and to predict the spatial-temporal evolution of the probability density function of fiber orientation. The flowable concrete-fiber mix is modeled as a viscous Bingham-type fluid. Model predictions qualitatively agree wit......
Stability analysis of constrained multibody systems
Computational Mechanics - - 1990
Automated algorithms for the dynamic analysis and simulation of constrained multibody systems usually assume the rows of the constraint Jacobian matrix to be linearly independent. But during the motion, at instantaneous configurations, the Jacobian matrix may become less than full rank resulting in singularities. This occurs when the closed-loop goes from 3D to 2D type of configuration. In this pa......
A Lagrangian method for constrained dynamics in tensegrity systems with compressible bars
Computational Mechanics - Tập 67 - Trang 139-165 - 2020
This paper presents a Lagrangian approach to simulating multibody dynamics in a tensegrity framework with an ability to tackle holonomic constraint violations in an energy-preserving scheme. Governing equations are described using non-minimum coordinates to simplify descriptions of the structure’s kinematics. To minimize constraint drift arising from this redundant system, the direct correction me......
Heat transfer analysis of composite slabs using meshless element Free Galerkin method
Computational Mechanics - - 2006
Unified treatment of microscopic boundary conditions and efficient algorithms for estimating tangent operators of the homogenized behavior in the computational homogenization method
Computational Mechanics - Tập 59 - Trang 483-505 - 2016
This work provides a unified treatment of arbitrary kinds of microscopic boundary conditions usually considered in the multi-scale computational homogenization method for nonlinear multi-physics problems. An efficient procedure is developed to enforce the multi-point linear constraints arising from the microscopic boundary condition either by the direct constraint elimination or by the Lagrange mu......
On the accuracy of various large axial displacement formulae for crooked columns
Computational Mechanics - - 1988
A numerical study on low and higher-order potential based BEM for 2D inviscid flows
Computational Mechanics - Tập 32 - Trang 327-335 - 2003
A formal error analysis of the order of approximation of a potential based boundary element method (BEM) for two-dimensional flows is performed in order to derive consistent approximations for the potential integrals. Two higher-order approaches satisfying consistency requirements to attain second and third order convergence in the potential are selected for numerical implementation. From the form......
A study on lateral impact of Timoshenko beam
Computational Mechanics - Tập 6 Số 2 - Trang 101-108 - 1990
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