Skip to main content

Ask iMechanica

Description

If your topic fits none of the following forums, post it in this default forum

Estimate scalar field whose source is not defined on grid point

Submitted by rohan_patel8388 on

 
Hello,
 
I need to compute value of scalar field on grid points. But the thing is that the source (scalar value e.g strain or temperature) is not defined on grid point. It's somewhere between the mesh element and i want to comute its effect on grid points of regular mesh created by finite difference scheme.
 
Could any one please give me idea or hint in order to do approach for computing it?
 
Thanks,
Rohan   

Nonlinear stiffness for cohesive behaviour

Submitted by noble350 on
Choose a channel featured in the header of iMechanica

Hi all,

 Does anyone know how to define nonliner (or exponential) stiffness for cohesive behaviour (for ascending branch before damage)? In CAE it's only allowed to enter one value

 Thanks

 Mo

LS-DYNA: How to output only specific time interval of D3PLOT in explicit analysis (crash)

Submitted by scoutfai on
Free Tags

I am using LS-DYNA for automotive crash simulation.

I have a need to look into great detail at a specific time interval of a simulation animation. 

I need to output the D3PLOT at 0.1 milisecond per plot from certain time intervial, example termination time of simulation 100 milisecond, now for some reason I want to output D3PLOT with DT=0.1milisecond during time 70 milisecond to 75milisecond only (just an arbitrarily example) and still be able to view it by directly opening the main d3plot file in post-processing software like Animator.

Picture frame shear test

Submitted by sroopjs on
Choose a channel featured in the header of iMechanica

Hi,

 I'm trying to simulate a picture frame shear test using ABAQUS and I have landed up with some problems for which I haven't been able to find any solution from almost a week. Any help would be much appreciated!

So, here's the problem:

I have a fabric sheet of area 140mm x 140mm. The BC are as shown in the file bc.png.The bottom left corner is fixed and a displacement of UX = 40mm and UY = 40mm is applied on the top right corner node.

How to simulate frequency response

Submitted by BMEstudent on

Hi all,

I'm trying to perform frequency
response of a simple model (say a rectangular shell) in abaqus.

The idea is to apply step-function load
and do dynamic analysis, then apply fft to the velocity response to define the
frequency response. Mathematically, if one applies impulse load to a
system, the response of the system will contain all frequencies.
Since the derivative of the step-function is the impulse function,
practically people apply a step-function load and then perform fft on
velocity (the derivation of the displacement).

Finite element modelling of voided slabs (bubble deck slab)

Submitted by kajalschopra on

Hello,

I am lloking to write a finite element code for the analysis of voided slabs (also known bubble deck slab).

As you might know (http://academic.research.microsoft.com/Publication/56975105),

Normal
0

false
false
false

EN-US
X-NONE
X-NONE

MicrosoftInternetExplorer4

Co-simulation Engine Mapping search failures in Abaqus

Submitted by ahsanhummayoun.uet on
Free Tags

can anyone guide me what is co-simulation engine mapping search failures in abaqus?? as i get this error while trying running co-simulation between AbaqusCFD and AbaqusStandard.



i have created CAE Model with single fin (mounted on tube) and tube as a single part and created partion wall along the edge of fin, Created CFD Model with fluid, assigned structured mesh.



Even file pre-processor completes successfully but it aborts showing "co-simulation engine mapping search failures in abaqus"