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Hallo again, Csmanien. Yes, to my diffidence, I have to agree about 3D elements being the applicable element type for this purpose. Mislead myself by the thought of having to specify thickness in case of plane stress, and not so for plane strain! By second thought I agree that although the...

Hallo In my opinion you need to use plain stress elements to model the different specimen thicknesses, and, both material (plasticity) and geometry non-linear effects should be simulated. As the load increases, you must be able to see the stress rising until it reaches the specified yield...

You might like to have a look at a standard like MIL-A-8625; it tries to address most of the issues you mention. Fatigue properties are generally reduced by the brittle anodizing. A recommended allowance for the expected dimensional increase = 1/2 thickness of the anodizing...(but, as jgKRI...

Hallo Marc Nicely described question. I think what is happening, is that although the part is in tension in say the x-dir., there is developing a tensile stress in the perpendicular or y-dir. due to Poisson's ratio (it wants to contract but is restraint from doing so by say a strong shoulder)...

UcfSE; Maybe...? [wink] Yes, designing/allowing for fatigue (lower allowed stress levels) is what I hinted in my previous post. Designing for fatigue brings along more uncertainties (e.g. w.r.t. loading). As said, it just appears to be questionable or less robust practice - granted...

Without levelling nuts below, one can tighten / re-tighten the nuts after the concrete/grout has set in order to generate a proper preload. It has to be noted that the modulus of concrete is say ±6 times lower than that of the bolts, allowing a significant length of the bolt to participate...

Thanks 'SlideRule' for confirming the practice. I can certainly see the benefits of not grouting but am actually more concerned about no preload and therefore the possibility of fatigue failure... Especially given the stress concentrations present in the bolt threads. Other considerations...

Thread507-42018 has reference. The practice of having a (tower) base plate resting on levelling nuts, and more than often, also without filling up below with grout, keeps bugging me... As pointed out in the referenced thread, one could take measures, and even do maintenance, to protect the...

To correctly model different production stages involving some very specific manufacturing steps, where say both stages do have its corresponding configured drawing, I figured 'extruding over' as a proper way to do it - but, that is only after having started a new part linked via Insert > Part...

M-Flyo Capturing deformation / all effects in the specific view mentioned, would require full 3D (see tip by Mustaine, not only equal but also thickness counts) but you could build a 1/4 model.. Maybe, except if the roll really has a very, very large relative size (I would say more than that...

Hallo Greg I fully understand and agree with you about the concern that a draughtsman, or designer (not experienced with structural analysis as such), might cause expensive errors to happen. And, that CAD integration increased the chances of this to happen (purely because of the FEA being...

Hallo "APav" You know your story..! - thanks a lot! This little bit of functionality already evaded me right from the beginning when we started using Femap. I tested the method as proposed and could see why you call it "weak", but it gives me 80% of what I need - enough to live with I...

Hallo all Does any one perhaps know how to show the edge lines of a 3D model on a stress contour plot? (also in case of a deformed model/geometry). I am only aware of the Filled Edges setting; but, it plots lines representative of all element edges (not only for edges lying on the model...

Hallo Andrew I do not want to unnecessarily cross-post; do you perhaps have access to Siemens GTAC support forum "Femap Misc"? - because there I recently responded to a similar question offering a simplified approach you might like to consider. Say if you do not get right. You might...

Hallo trainguy Well, opinions differ - for say 25 years already I am doing FEA in-between all my other tasks as mechanical engineer. Let's say at least once a month, sometimes for two weeks continually. I started with EMRC NISA - had to keep cryptic notes/tips/guidelines for each type of...

Fully agree, Outpost11!! Also not very nice for the occasional user (who of course still understands the theory and what basically needs be done), or users with little time... Carrying along too much legacy (and even all the old code words for this and that). Regards

Yes, but trust me - we achieved more than what you might think using our orphanware..! ;-) Up to v4.5 of DS it actually had 2D axisymmetry capability. Have to admit I do miss the 2D axi capability when doing NL analysis. I am a bit surprised about you saying NENastran is not good handling...

Any comments/experience on how Nastran FX shapes up against other mid-range (design) software like Cosmos DesignStar or NEi Fusion? Capabilities we are interested in include regular type of non-linear and dynamic functionality. Will try it out if it makes our short list. Have seen the...

Actually a very good tutorial / sample problem in basic FEA because it touches on quite a few aspects! Ed, I have found that often guys are not aware of the increased strength caused by drawing.

Material linear vs NL? Geometrical NL? Mesh refinement? Hand/manual calcs? You have a very large influence on the answers Cosmos spits out! What is the purpose of this all?