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Implementing XFEM in ABAQUS using dynamic implicit step
Is there anybody who has implemented XFEM in ABAQUS using dynamic implicit step? My model runs fine when I use 'static, general' step but when I change it to 'dynamic, implicit' I get following error message"The following XFEM cracks are failing to correctly generate and says crack domain contains invalid element shape." Please let me know what do I need to change in the model to fix this error.
Thanks so much for your help,
Sincerely,
Vinod Kushvaha
Bridging techniques in a multi-scale modeling of pattern formation
F. Xu, H. Hu, M. Potier-Ferry, S. Belouettar
International Journal of Solids and Structures (2014), doi: http://dx.doi.org/10.1016/j.ijsolstr.2014.05.011
Abstract:
How the pressure in ANSYS is implemented?
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There are several possibilities for the realization of the presure load.
For
example, when I apply a pressure to an area (lets say, thin rectangular
plate) the area of the plate grows during the deformation process. One
possibility is to keep the pressure per unit area constant (in this case
the total force acting on a plate grows during the deformation) and the
second is to keep constant the total force acting on the plate (in this
case the force per unit area decreases with the deformation). I looked
generat initial stresses ?
Hi everybody
I am a geotech engineer, I use a program Abaqus, I want to know
when I use tow layers of soil, each layer with their properties, when i use the contact between these layers
my question is; How i generat initial stresses without discontinuity between the two layers ?
Thanks
Stress concentration near stiff inclusions
Do singular stress fields exist close to rigid corners?
See the photoelastic investigation at http://www.ing.unitn.it/~bigoni/stiffener.html
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Acta Mechanica Sinica, Vol.30, Issue 3, 2014 is online now!
Dear everyone!
The third issue in 2014 (Volume 30, Issue 3) of Acta Mechanica Sinica (AMS) is now online.
Welcome to this SCI-indexed journal http://ams.cstam.org.cn for rapid publication of your exciting results.
_______________________________________________________________________________
Phase-field modeling and simulation of fracture in brittle materials with strongly anisotropic surface energy
Crack propagation in brittle materials with anisotropic surface energy is important in applications involving
single crystals, extruded polymers, or geological and organic materials. Furthermore, when this anisotropy
is strong, the phenomenology of crack propagation becomes very rich, with forbidden crack propagation
directions or complex sawtooth crack patterns. This problem interrogates fundamental issues in fracture
mechanics, including the principles behind the selection of crack direction. Here, we propose a variational
Problem in steel connection model using abaqus
Hello Everyone,
I'm trying to model an extended shear tab connection using ABAQUS 6.13-2, I've tried to model 4 connections and I compared the results I've got with the experimental work, and I noticed that the FEA is way stiffer that the experimental work, I have only one warning and it says "If significant clearance/overclosure exists between surface pair (assembly__pickedsurf579,assembly__pickedsurf580) and the master surface does not have rotational degrees of freedom, adjustment is recommended for correct enforcement of the tie constraint"
Compression buckling of polymeric beam/column
Hello,
I have a problem with a stacked colum of elastomeric membranes (natural rubber or silicone).
I am looking for a compression buckling criterion that applies for hyperelastic materials in presence of large deformations (up to 400%).
I've read about Haringx formula, that should apply for these materials, but I suspect that it is valid for small strains only.
My question is:
- is there a suitable buckling criterion for this case?