Hi
Now I am confused with a problem related to the Cohesive element in ABAQUS.
The model is simple: simulate the Mode II crack propagate at the interface between two materials.
first I creat two parts. and a layer of cohesive element is used to separate them. Tie constraint is employed between the cohesive element and the surrounded materials. But the results show the cohesive element can not break.
I am working on shear failure of sandwich composites.I have modelled a sandwich composite with surface based cohesive behavior in ABAQUS 6.9.Now i have to do damage modelling. For damage initiation i have to describe values of 'peak values of contact stress' or 'peak values of contact separation'.In addn i also have to describe values of 'critical fracture energy' for damage evolution. I don't know how to find these values or where from i will get these values.
I wrote my first experience of using VTK with my hp-FEM code here. This is only with linear tetrahedra. To use VTK for high-order elements seem formidable, altough there's a paper that describes how it can be done. If anyone has experiences with VTK in FEM, I'd love to consult with you.
razi
Hi,
My Name is Moiz. I need some material about composite parts fabrication and the details about how the ply geometry is decided based on strength requirements. Any help would be really appreciated.
Thanks,
Moiz
I'm working on a MSc thesis involving both rigid body (zero energy) & deformational (elastic) modes and their orthogonality wrt mass matrix. I want to prove that elastic modes are mutually orthogonal (done !), that elastic & rigid body modes are so (sort of done !) & that rigid body modes also are so (unsure how ?). Can anyone offer any advice ?
Thanks, John.
Recent experiments have shown that a voltage can induce a large deformation in an elastomer of interpenetrating networks. We describe a model of interpenetrating networks of long and short chains. As the voltage ramps up, the elastomer may undergo a snap-through instability. The network with long chains fills the space and keeps elastomer compliant at small to modest deformation. The network with short chains acts as a safety net that restrains the elastomer from thinning down excessively, averting electrical breakdown. It appears possible to find a dielectric elastomer capable of giant deformation of actuation. You can read the paper, or take a look at the slides posted here.
Hello to everybody,
Can somebody help me with advice in the next problem : I want to study an dynamic movement of some beams, with rigid body option from ANSYS Classic. I encountered the problem when I want to choose the element type for cilynder. I choose LINK11. But I need to simulate what is happend between the moment when is applied the force on cilynder and imposed lenght of ciclynder after pool.
How I can settup the properties of element LINK11 to satisfy my results.
Dear all
I want to start modeling the Hyper foam behavior in abaqus software, it is very usefull for me to consult with someone who works on that.
Regards
Babak
Dear all,
I' m trying to make a model in VUMAT for shape memory alloy based on Lagoudas 's thermomechanical constitutive model. It seems that It's necessary an iteration to evaluate the thermoelastic prediction.
My questions are : is it possible to use an iterative loop in the VUMAT or it's better to avoid it??Could someone suggest me a different way so that I can avoid the iterative loop?
Many thanks,
Cece
