Hello,

I was wondering if any commercially available FEA softwares allow multi time step analysis. 

By multi time step I mean being able to integrate different regions of a mesh with different time steps. 

Say there is a cantilever beam, I wish to use a different time step on the fixed end half of the beam and a different time step on the free end half of the beam. 

Please let me know if there is an application/software that allows me to select different time steps in different regions of the mesh. 

Thank you.

Dear all,

I have a problem in model verification for a curved beam model. I have formulated an Euler-Bernoulli beam model similar to the following paper (refered as Pai's model), but employing Euler angle description.

         Pai,
P.F., Palazotto, A.N., 1996, “Large-deformation analysis of flexible beams,” International Journal of Solids Structures,
33(9), pp. 1335-1353.

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Best wishes

Richard Payne BA(Hon), CEng, MIET  

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 Thanks

Hi,

I'm an Engineer and a Ph.D. student in Applied Maths, working in the field of Nonlinear Finite Elements for Elasticity. I often think about my future career since, by now, I have a strong experience with coding FE in C++/Matlab/Mathematica, but no clue whatsoever about commercial black-box softwares for FEA. I'm worried about this, since most of the job vacancies from the industry (I'm not interested in pursuing the Academic career) seem to require only experience with a specific software and application, and not to directly code FE.

Example of 8-node shell elements representing a simply supported beam.  The beam can represented in two different orientations.  Both are equivalent if the plate thickness is the same as the length in this case.  The boundary conditions in the upper beam actually depend on how the beam is physically supported (whether the restraint is underneath the beam or in the middle or at the top).  In this example, I have placed the support in the middle.  Restraints have been added in the X and Y directions on one end and in the X direction on the other end.  Because I have two beams in one model, I have modelled them as 3D plates so have added restraints in the Z directions for all six end nodes.

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On Aug 10, 2009, Semiconductor International (SI) Newsbreak published a report on my work in AMD about 3D fracture study of underfill delamination as the top story in that issue.  I have never imagined that. Except the pleasure I received from this good news, I wonder if this work is also interesting to iMechanica community.  For that reason, I attach here the SI news report and the original paper published on ITherm2008 Proceedings. Welcome any comments and thoughts.

Hi,

I have developed a FORTRAN code to simulate the molding process of glass to make lenses. Hence, it involves a contact analysis between the glass and molds. The contact is modeled using the master and slave node concept and the mold is assumed to be rigid. For the application of this code, we are looking at highly precise dimensions to capture the curve of the mold on the glass after molding.