Ask iMechanica

Hello Everyone,

Hi ,

Can anyone please give the appropriate reason why this system error code 5 comes while using UMAT with abaqus and how to resolve it.

Aoa

Hello

brothers

Currently,

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 do a second order analysis for apply axial load effect in ansys.

how can obtain frequency with modal analysis in ansys for above explaintion.

Hello,

I am having questions with tensors. I know that not all matrices are tensor. Tensor is a homogeneous, linear and vector valued function. So my questions are:

1. Are all 3*3 matrices tensors?
2. Are all anisymmetric second order tensors orthogonal?

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

2 question

1) how can i do p-delta analysis in ansys  ?

2) how can i determain dynamic responses ( frequencies and mode shape ) from results of p-delta above in ansys?

Hi there,

Doese any one have a working MATLAB code for paticle splitting methods? I have used Monte carlo simulations, Subset simulations etc in the past and am

wanting a more effecient code.

Thanks in advance,

Karthik