locking in FEM
I have attached notes prepared to better understand locking. This might be useful to FEM guys....
Blog posts
Crystal Plasticity Modelling
Hi all,
I want to set up a critical shear strain - normal stress criterion, in UMAT by prof. Huang. For the strains it is easy to get a critical strain along a slip plane; but for the stresses the notation is quite weird. It is not the same! See below:
C Array STATEV:
C 3*NSLPTL+1 - 6*NSLPTL : current components of normals to slip
PhD position at Delft University of Technology, the Netherlands
We welcome applications for a fully funded 4-year PhD position in the field of computational mechanics and materials science. Further details in the attachment.
DEM modelling of granular flow
Hi iMechanica,
I want to start a discussion on the current status of DEM modelling of granular media. I know that Luding has published many papers in this area. Please add to the current research on granular flow modelling like viscoplasticity, hypoplasticity etc and the numerical DEM methods.
P as the Optimal Inhibitor for Suppressing Surface Electromigration and Electrical Breakdown at the Source
Based on an extensive search across the periodic table utilizing first-principles density functional theory, we discover phosphorus to be an optimal surface electromigration inhibitor on the technologically important Cu(111) surface-the dominant diffusion pathway in modern nanoelectronics interconnects. Unrecognized thus far, such an inhibitor is characterized by energetically favoring (and binding strongly at) the kink sites of step edges. These properties are determined to generally reside in elements that form strong covalent bonds with substrate metal atoms.
Solving Navier-Stokes by Finite Element
Hello
I want to solve a system of partial differential equations (Navier-Stokes with continuity and momentum equations in one-dimension) using a finite element routine. I have several questions:
1. How to couple the two equations (continuity and momentum) into a single system with a single solution.
2. Apart from time, I have two unknowns: volumetric flow rate (Q) and pressure (p). Should I consider these as two degrees of freedom on each node in the domain.
hi
hi
sweep mesh of a dome in ANSYS
I am dealing with a partial sphere dome in ANSYS, I created the volume by extruding half of an arch area along the axis at the dome center. I am using SOLID65 elements. The problem I am facing now is how to properly sweep mesh the whole volume ( actually, there are four 90 degree partial sphere together after the extrude of the area), because if I simply sweep the volume, the elements around the top center of the sphere will cause element shape warning in the static analysis.
Dose anyone have any idea about how to deal with the mesh around the center?
Instrumented Indentation, It's More Than Hardness
As the validity of Instrumented Indentation continues to expand throughout all materials research, many throughout the community are still unclear as to what exactly can be achieved. Although advances in technology will continue to grow the list of capabilities of Instrumented Indentation, we will review a list of what can be expected as of now. But first lets quickly review how Instrumented Indentation works.