Skip to main content

Blog posts

Simulate tensile test with damage, ideas?

Submitted by R.Billard on
software
ABAQUS

Hello everybody,



I want to simulate a tensile test using "damage for ductile metals" and "ductile damage". ABAQUS requires three parameters:

-Equivalent fracture strain at damage initiation (a)

-stress-triaxiality (b)

-strain rate (c)

I have already seen Abaqus analysis user's manual (23.2.2), but there's no example. 



Currently, I defined a 3D solid deformable  and an elastic and plastic behavior. I do not understand how to select a first set of parameters for the "ductile damage".

** MATERIALS

Lithium batteries--When mechanics meets chemistry

Submitted by Zhigang Suo on
research

When I learned chemistry in college, the subject was presented to me with equations of chemical reactions.  It took me some time to realize a couple of simple points:  reactants need to meet to produce a product, and compounds take space.

The connection between chemistry and mechanics is made vivid to me in recent years in studying lithium batteries.  As an example, here is a recent paper when chemistry is linked with plasticity, mass transport, and fracture—essential ingredients of solid mechanics.

Debugging standard user subroutines of ABAQUS

Submitted by Hamid.Mirkhani on
research
User subroutines in ABAQUS

Hi,

I managed to find a way to debug UMAT step by step. I tested it on ABAQUS 6.9 using intel fortran 11.0 which is integrated with Visual Studio 2005 or 2008 running on Win 7/x64. The process is the same for other versions and other user subroutines (The same process should also work in linux, but with different debugger).

Using VGETVRM to compute strain in VUSDFLD ( abaqus explicit subroutine)

Submitted by arash_n on
research
metal forming

hi everybody.

I've used vgetvrm in vusdfld to calculate strain.

I have two question.



1- what's the differences between tensor strain and engineering strain?

I read user subroutine manual and it says"The shear strain components returned from utility subroutine VGETVRM are tensor components and not engineering components."



2-I want to calculate PE11 and PE22 with vgetvrm. but my results are strange.for example PE11 change between -11.14033 and 75.25797.

and PE22 change between -1.5974975E-04 and 4.7500171E-03

Graduate Student Researcher Position in Biomedical Device Development Research Seeking Ph.D. Degrees

Submitted by yjchun on
job

The BioManufacturing and Vascular Device Laboratory at the University of Pittsburgh seeks a dedicated Graduate Student Researcher, interested in developing novel manufacturing processes and realizing advanced biomedical devices (http://www.pitt.edu/~yjchun/home.html). 



abaqus superelastic ( Auricchio's model)

Submitted by samo on
superelastic

good morning,

im PHD student in france working in stent problems,

i want to simulate only superelastic model of nitinol in ABAQUS (   

Auricchio's model)

some doc are available in th internet, but still confused



how can i idintify this material in Abaqus?

do i have to code this model and write subtoutine in fotran  or it 

already exists in ABAQUS ?

what is in summery  the steps that i have to do??

thanks 4 giving some of ur time 4 this question

ALTNJI.

BEST REGARDS.

Hysteretic damping in modal analysis using ANSYS

Submitted by saeed_11 on
research
ansys
Modal Analysis
Hysteretic damping

Hello,

I want to do modal analysis of a structure with viscoelastic material. The viscoelastic
material has a complex youngs modulus E= E (1+i*g), where g is the loss factor. In ANSYS, modal analysis ignores all
nonlinearity, so how can I perform modal analysis with viscoelastic material?

OR

How can I perform modal analysis in ANSYS considering hysteretic damping (complex Young’s
modulus  E= E (1+i*g) as input).


Cheers

 

Subscribe to Drupal blog posts