USNCCM Conference, Minneapolis, MN
Two talks tomorrow:
1. Meso-Origami: Folding and Assembly of Single and Multilayer Graphene Sheets
2. Hierarchical Mechanics of Spider Silk, from Molecules to the Web
Blog posts
Simulate tensile test with damage, ideas?
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
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.
Fraud, h-index, etc.
This is an interesting article: Fraud, the h-index and Pasternak. How do we evaluate ourselves and others, especially those not in our own fields? We may not have to find an answer as an individual researcher, but the univeristy adminstrators have to.
Debugging standard user subroutines of 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)
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
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)
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.
Need Help With High Impact Loading - LS-Dyna
Good afternoon all,
I'm trying to simulate high impact loading and fragmentation of concrete for my dissertation.