Dear all,
Many numerical implementation of plasticity model uses spectral decomposition to represent the Cauchy stress, elastic strain, such that stress update algorithm is written in the principal directions. As a result, I wonder what makes it benefical to write the stress update algorithm in spectral form?
Thanks,
WaiChing Sun
The difference to the common model used is the f,g terms. The 3D FEM formulation has been derived and a new fortran program is written. The derivative matrix is symmetric. But the calculation result does not converge. I have tried every means to get a converging result. But it doesn't work, the residual norm always increases.
Hi, it would be greatly appreciated if anyone could tell me the methods to measure the elastic constants of an orthotropic composite (3D). Can we measure one single modulus by one specific stress state? What is the efficient way to do the test? Any information related to this test is appreciated.
Thanks and regards
Yunxin
Several month ago I login a account ,then writen my fist blog.But I can not think back my login email,so I have to login with a new email. In the last months ,Most of time was spend in program.My Boss except me to get repetition of Werner's work --computer simulation of dunes. Now I get work finished. It's amazing and excited.
Dear friends,
I want to share our recent research work on NiAl nanowire, which is published in Nanotechnology, IOP publishing. The abstract of the paper is given below. Further details can be found at "Vijay Kumar Sutrakar et al 2009 Nanotechnology 20 295705 (9pp) doi: 10.1088/0957-4484/20/29/295705"
I have one very simple question regarding ANSYS-AUTODYN and LS-DYNA. It seems that both can model impact loads.
My
questions is which can model low-velocity impacts and which can model
high-velocity impacts. I have some troubles modelling low-velocity
impacts in autodyn (changing the mass of the projectile does not affect
the pressure and the stresses on the target. Does this mean autodyn
only models high-velocity impacts)
Immersed in an ionic solution, a network of polyelectrolyte polymers imbibes the solution and swells, resulting in a polyelectrolyte gel. The swelling is reversible, and is regulated by ionic concentrations, mechanical forces, and electric potentials. This paper develops a field theory to couple large deformation and electrochemistry. A specific material model is described, including the effects of stretching the network, mixing the polymers with the solvent and ions, and polarizing the gel.
hi plz help me in doing fatigue problem in ansys classic if u have tutorials plz send it to me its my kind request....monday is last date for me to submit..plz help me
Dear All,
I am trying to simulate mechanical behaviour of a concrete unit cell for uniaxial compression laoding. I have apllied periodic bounadary conditions on both lateral edges using linear equation option available in ABAQUS where as on top and bottom edges load is apllied. Deformed structure shows there is no lateral deformation and unit cell behaves as if it is confined laterally on both sides. I am confused about my boundary conditions whether they are correct or not.
Equation used to aplly periodic bounadary condition are
