research

I am trying to simulate a crack opening process in ABAQUS. I start up from a simple model of plate with a notch subjected to tension. I would like to see the crack opening. To model a brittle mnaterial behaviour I have added a brittle cracking with sub-option brttle failure and brittle shear.

Please look at dat file:

*Heading

*Node

*Element, type=CPS3

*Element, type=CPS4R

*Nset, nset=ASSEMBLY_PART-1-1__PICKEDSET2

*Elset, elset=ASSEMBLY_PART-1-1__I1

Modeling of Viscoelasticity with Hypoelasticity constitutive equations

Submitted by Rotimi Adeleye on Sun, 05/13/2012 - 18:02

research

thermoviscoelasticity

Hi all,

I'm trying to model high temperature viscoelasticity using hypoelastic constitutive equations. I'm not sure of how to include the rotation tensor in the generalized viscoelastic equation.

kindly advise me.

Thank you very much.

Objective Stress Rates in Finite Strain of Inelastic Solid and Their Energy Consistency

Submitted by bazant on Sat, 05/12/2012 - 01:38

research

finite element analysis

large deformation

Variational Methods

Commercial Software

In many practical problems of solid mechanics, it is sufficient to characterize material deformation by the small (or linearized) strain tensor. But there are also many problems where the finiteness of strain must be taken into account.

Almansi strain

Submitted by Jerry Brown on Fri, 05/11/2012 - 23:09

Forums

Ask iMechanica

Choose a channel featured in the header of iMechanica

research

How is the Almansi-Eulerian strain used?

Is there a way to use it with some form of static equations of equilibrium to solve small strain, large rotation problems? I have sucessfully applied the Green-Lagrange strain. But, I can't find anything on how the Almansi-Eulerian strain is used to formulate and solve boundary value problems.

stiffness v/s no. of elements

Submitted by vjuair on Fri, 05/11/2012 - 16:03

Forums

Ask iMechanica

Choose a channel featured in the header of iMechanica

research

hi,

i am new to finite elements, i may be wrong, wnen i was solving a problem of hanging beam and load applied at its free end for obvious reasons there was a displacement at the free end. when i increased the no. of elements, deformation was minimum compared to previous result. does this actually mean stiffness got increased? as the basic thing about stiffness is that it depends only on geometry, material property and boundary conditions which were all constant in my case. alll i want to ask is, does stiffness depends on no. of elements?

thanks

2D modelling of laser welding

Submitted by Tisha on Thu, 05/10/2012 - 18:50

while carrying out a simple 2D analysis of welding of butt joint considering the source of constant heat flux and applying it at certain nodes as constant heat flux, i encountered a problem that it says that the temperature at particular node is exceeding the pre set limit and no solution is obtained. I am a freshman in Ansys so any help in this regard will be helpful

Discontinuum numerical modelling with 3dec

Submitted by Andrea.Delisio on Thu, 05/10/2012 - 07:30

Hello,

As part of my PhD, I have to study the problem of the stability of the excavation face in tunnels driven in jointed/blocky rock masses. Therefore, I`m trying to build a 3d discontinuum model with 3dec. As I`m rather new to this code, I have a series of doubts (mainly concerning the way to reduce the size of the model and then the time needed for cutting the block geometry and running the calculation).

I would be really glad if someone who knows the code could help me.

Thank you!

Andrea