Generally, the finite element method is a powerful procedure for analysis of tall buildings. Yet, it should be noted that there are some problems in the application of many finite elements to the analysis of tall building structures. The presence of artificial flexure and parasitic shear effects in many lower order plane stress and membrane elements, cause the numerical procedure to converge in...

Finite element methods for problems given in complex domains are often based on tetrahedral meshes. This paper demonstrates that the so–called rational Large Eddy Simulation model and a projection–based Variational Multiscale method can be extended in a straightforward way to tetrahedral meshes. Numerical studies are performed with an inf–sup stable second order pair of finite elements with dis...

A generic scientific simulation environment is presented which offers topological, dimensional, and functional independence. Therewith complete mathematical formulas and discretization schemes like finite volumes or finite elements can be expressed directly in C++. The new approach as well as the applicability and the performance related to well established simulators are highlighted.

A generic scientific simulation environment is presented which imposes minimal restriction regarding topological, dimensional, and functional issues. Therewith complete discretization schemes based on finite volumes or finite elements can be expressed directly in C++. This work presents our multi-paradigm approach, our generic libraries, some applications based on these libraries, and performan...

We consider a waveguide with principal guiding direction for which the beam propagation method is applicable. A simulation method based on a finite element method for Maxwell’s equation with 3D Nedelec elements is developed. The power loss of the waveguide is minimised by varying a finite number of shape parameters. We validate the method by comparing our findings to some published results.

analysis of the stresses, displacements, and horizontal strains of the ground subsidence due to underground excavation in rocks can be accomplished by means of a hybridized higher order indirect boundary element/finite difference (be/fd) formulation. a semi-infinite displacement discontinuity field is discretized (numerically) using the cubic displacement discontinuity elements (i.e. each highe...

In this paper we present a novel approach for stable interactive cutting of deformable objects in virtual environments. Our method is based on the extended finite elements method, allowing for a modeling of discontinuities without remeshing. As no new elements are created, the impact on performance of the simulation is minimized.

cold roll-forming is a process in which the roll of sheet is formed by passing continuously through the set of rotary rollers without changing thickness in a cool way until it is formed to the desired profile. in this paper a parametric study on the section twist angle in roll-forming the non-symmetric channel is presented, using finite element simulation. at first finite element simulation res...

the built up layer thickness in secondary deformation zone is one of the important parameters in metal cutting process. the built up layer (bul) is formed in second deformation zone near the tool-chip interface in the back of the chip. this parameter influences the tool life and machined surface quality. this bul should not be confused with the built up edge (bue). the deformation of the bul in...