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Could not agree more.

Disagree away :) It was the airframe industry I was referring to. What I said is perfectly correct in that application.

Well a laptop certainly isn't ideal for FEA and in general are a compromise. FEA performance is directly related to I/O speed. That points to SCSI drives and generally you do not get those in a laptop. Gobs of RAM helps but its the read/write speed of these drives that really permit you run...

I think your problem is that you are thinking of modelling it at all. The question indicates that you really need to look into a design text and discover why joints are installed with preload. A model is the last thing that you want to create. I would hope that before even thinking of making a...

Friction is one of the more inconsistient factors in the response of a joint. It depends on clampup forces that have a tendancy to decrease during the service life of the joint. There is a good reason that you get no credit for it in aircraft applications with respect to load transfer in a shear...

Well can't seem to edit it. Meant to say that it does not change the stiffness matrix. Since it is actually an MPC.

You are both correct in part and its the terms that you are using to describe it that are confusing things. The RBE2 is a rigid connection typically attaching a single node to other multiple nodes. Depending on what DOFs you are transmitting (translations and/or rotations) you are slaving those...

Cosmic nastran and was developed by nasa and it seems that its too late to get a freebie. http://www.cosmic.uga.edu/

Don't you have a system admin that has set things up for you ? Anyways what does the deck look like ? Was the job submitted directly to nastran or via the manager in patran ?

k6rot controls the stiffness given to the drilling degree of freedom in plates. Otherwise plates at 90 degrees to each other but sharing 2 corner nodes would have no connection for that degree of freedom. Autospc permits degrees of freedom that are zero or very small in comparision to their...

You haven't mentioned what hardware you are using. I haven't had much time using FEMAP but I gather that a faster video card would help?

What prompted the question was an installation of a sub-frame connector to a unit body vehicle. Stitch welding is recommended (3-4" runs). I'd like to continuously weld it by connecting the beads. What has me worried is that the heating of the original structure will anneal/weaken it. Based on...

How are HSLA steels affected by MIG welding? Specifically in the gauges used for automotive unitbody construction. Is there a large reduction in Ftu as a result of local heating due to annealing? I was under the impression that annealing did not generate a significant reduction in strength but...