I have an eigenvalue solver, subspace iteration, that can get only positive eigenvalues. I have a problem (K - lambda M)u=0 that has pairs of eigenvalues +/- lambda. How can I transform the eigenvalue problem for the solver to search for lambda^2 rather than lambda?
hi,,,,,,,,,,i am doing project on viscoelastic sandwich beam in ansys can any1 give idea how to model ,assign properties ,which element,,,,,,i need to choose if any references /tuturial/copy,,let me know it will be helpful,,,,,,,,,,,,,,for me...............email@example.com
I am getting displacement and force both zero. I am attaching .cae file please have a look where i am making mistakes.
New research is emerging out of a project where Ohio State University used our software to reconstruct the anatomy of an ant neck. In this project, micro-CT scans of an ant neck were reconstructed using Simpleware software and exported as a mesh for analysis in Abaqus.
Simulations in Abaqus identified where stress concentrations tend to take place for ants' necks, providing insight into how they are able to support large weights. This research has created the potential for developing micro-robots capable of handling similar loads, as well as other ant-inspired designs for space engineering.
does anyone know, if it is possible to transfer a FE-Model from Abaqus to LsDyna? I build up the model with Abaqus Cae, so I can take either the *.cae or the *.inp file.
Thanks for your answers, Lena
May I know how do I export meshing from abaqus to nastran? is it possible?
I am new to this iMechanica. I am facing difficulty with simulating Groove noise in abaqus.
Can somebody help me out.
I am currently working on a project which needs mass-spring model. Previously I use MATLAB to implement 1D and 2D system, and I want to model 3D system by ABAQUS now. I am just starting to learn ABAQUS, it seems like there is not much tutorial or example about this kind of model.
I try to search in ABAQUS User's Manual, and get to know I can use the spring element. But how can I model the mass? I notice there are analytical rigid and discrete rigid when making a part, is this used to implement the mass? Since I can only import one discrete rigid once, how can I construct a big system?
Thanks a lot.
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i want to simulate and modelling fiber reinforced concrete in abaqus. but i don't know and i can't how to do it.
how can i simulate the fibers in concret?
please help me in this case.
I need to work with the CREEP subroutine. I have written a
CREEP subroutine which is rather complicated. My subroutine works
well for simple examples like uniaxial condition (I have verified its
correctness through comparison with outcome of some matlab routines).
when I apply it to my more complicated geometry, its convergence rate is too
slow. I think the problem should be in definition of DECRA(5) (or DECRA(2)) in
my subroutine and I would appreciate your support.
I read the ABAQUS
theory manual and got confused with the way I should define my parameters for
explicit and/or implicit LEXIMP = 0 or 1. (LEND?)
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I want to define the expansion coefficient alpha as a function of the depth, alpha(z)=f(z). How can I achieve this in UEXPAN? I cannot find a way to incorporate coordinates in UEXPAN.
I‘m working on the determination of the mechanical properties of carbon nanotubes
for different loading cases using ANSYS software ( i need to use them in my
model). My Finite Element model of graphene and carbon nanotube is working fine with beam188 element, but I have
some technical problems in my simulation. These problem are summarized in
points as follow;
i want to add a stress relation to abaqus
can i write it in fortran in a way that i can enter specification like c11-c12-....in abaqus then have the calculation of stress in fortran and bring back the result in abaqus to analysis?
I have recently started using abaqus for modelling the pre-forming of dry carbon fibre fabrics and was looking for some advice. I have quite a good ability to model homogeneous solids but moving onto anisotropic bodies that undergo large deformations is proving to be troublesome. I have read through the tutorials in the users manual regarding forming of sheet metal and things like that, but I'm hoping someone could direct me towards any website that might have a more specialised tutorial, or if anyone has experience with this type of simulation, perhaps we could discuss some of the errors I am encountering. (There is not many, but they are tricky to resolve!)
Thanks in advance for any assitance you can be.
we know that axial load effect on dynamic responses of structur ( for example comparsion axial load decreas frequencies) and Modal analysis does not depend on load too.
i want to obtain dynamic responses for simply supported beam under axial load. How do modal analysis in the presence of axial load in ansys (How apply effect of axial load)???
plz help me
I want to simulate the deep rolling process(as seen as in attachment)
in this model I defined 2 steps,at first, the rigid ball create a pressure to cylinder to create residual stress and at the second step the ball begins displacement with
a low speed in direction of cylinder longitude to create surface overlap, while the cylinder is rotating in both steps.
in this model I have used the explicit solver but it takes too much time and elements convergence cannot be accomplished.
how can i reduce the time of my solution?
or if u can please offer me another appropriate idea for this process?
Does anybody know which version of Intel visual Fortran and Microsoft Visual Studio are compatible with Abaqus 6.13-1? Thanks for your help.