Using crystal plasticity, finite element analyses were carried out to model cyclic deformation for a low solvus high refractory (LSHR) nickel superalloy at elevated temperature. The analyses were implemented using a representative volume element (RVE), consisting of realistic microstructure obtained from SEM images of the material. Monotonic, stress-relaxation and cyclic test data at 725 C were...

Numerical simulations of cardiac blood pump systems are integral to the optimization device design, hydraulic performance and hemocompatibility. In wave membrane pumps, propulsion arises from propagation along an oscillating immersed membrane, which generates small pockets fluid that pushed towards outlet against adverse pressure gradient. We studied Fluid–Structure Interaction between flow via...

the cracked brazilian disc (cbd) specimen is widely used in order to determine mode-i/ii and mixed-mode fracture toughness of a rock medium. in this study, the stress intensity factor (sif) on the crack-tip in this specimen is calculated for various geometrical crack conditions using the extended-finite element method (x-fem). this method is based upon the finite element method (fem). in this m...

The peak cap stress (PCS) amplitude is recognized as a biomechanical predictor of vulnerable plaque (VP) rupture. However, quantifying PCS in vivo remains a challenge since the stress depends on the plaque mechanical properties. In response, an iterative material finite element (FE) elasticity reconstruction method using strain measurements has been implemented for the solution of these inverse...

Abstract The fracturing process in geomaterials is studied to characterize a potential host rock for radioactive waste, such as the kaolinite-rich Opalinus Clay formation. Because of its sedimentary genesis, this can be considered transversely isotropic geomaterial. A semi-circular bending test here modeled based on eXtended Finite Element Method (XFEM), check formation and propagation cracks r...

Achieving accurate numerical results of hydrodynamic loads based on the potential-flow theory is very challenging for structures with sharp edges, due to singular behavior local-flow velocities. In this paper, we introduce, perhaps first time in literature marine hydrodynamics, Extended Finite Element Method (XFEM) solve fluid–structure interaction problems involving edges structures. Compared ...

This study has used the strain energy density (SED) approach to evaluate stress intensity factor (SIF) of cracked cruciform welded joints in Hardox 450 steel. A microstructural analysis was made steel which is composed refined and tempered low carbon martensite. The obtained results simulation will be compared with those provided by J-integral methode for different enriched zones contours based...

The paper shows an inf-sup stability property for several well-known 2D and 3D Stokes elements on triangulations which are not fitted to a given smooth or polygonal domain. The property implies stability and optimal error estimates for a class of unfitted finite element methods for the Stokes and Stokes interface problems, such as Nitsche-XFEM or cutFEM. The error analysis is presented for the ...