Ask iMechanica

Vibro-acoustics

Noise is one of the vitally important factors determining the quality of life and liveability in urban areas. We have awarded a grant to develop novel windows enabled with green and intelligent sound absorbing materials that have substantially reduced noise transmission, and at the same time maintain ventilation function to realize good thermal comfort and resource efficiency. You are welcome to apply if you are:

hello all. how can i model sound source in abaqus for STL analyses? thank you so much.

hi 
I model sandwiched buckling-restrained brace in abqus But I have several problems 
1- how to apply The cyclic loading and buckling together in this example ?
2- Why do not stress in analysis buckling?
3- how to Define interaction Between the concrete , bolt , core and......?
4- Buckling of the brace should be used for buckling analysis or static analysis alone can be used?
help me 
thank

Hi,

Can any one suggest me how to use coordinate transformation in the calculation of second order derivative of a function just like the use of Jacobian matrix in the calculation of first order derivatives

hello,

I nead to model plastic zone near crack tip in ANSYS MECHANICAL APDL OR ABAQUS.........Anyone know how to do it...do share with me..

thak you

Hi all,

Hi Everyone

In FEM modelling of trusses, if a support has been settled, how can apply this boundary condition in ABAQUS?

thanks

Hi

when I model a welded plate with ABAQUS software, sometimes I have to apply boundary condition such that only fix the two parallel faces in -y direction. I know how can I fix both +y and -y direction in load module. But, how can I fix -y direction only?

Dear All,

I am trying to model a fiber reinforced concrete slab on steel beams. I have applied the load in the first step and applied thermal conditions (convection and radiation) in the second step. The analysis reached 400seconds (tops) ( I was expecting 7000s). I have modeled the structure with solids. Slab tied to the beam.
the analysis was run with Abaqus Standard. I have tried the same model using Explicit but the second step won't even start due to convergence. I tried contact between slab and beam.

Will a static model yield an accurate solution when the failure mechanism is frictional slip? If so wouldn’t the implicit stepping need to be small? It seems counterintuitive that a large stepping implicit solver could be used to capture the solution of a path dependent problem like this. A brief problem description may help, an idealized analogy is described below.