Sheet Metal Forming Analysis
Sheet Metal Forming Analysis
(OP)
My background is in linear structural analysis. I do have access to NEiNastran non-linear, and someone just asked me to look at a deep drawing operation and figure out why some cookware is coming out of the die warped. My instinct is that deep drawing of sheet metal requires a specialized analysis. I imagine it could be done in NEiNastran, but I thought this type of analysis was normally done in Abaqus or one of the specialized metal forming FEA packages. I will likely refer them to one of the consultants at Abaqus. Any input?





RE: Sheet Metal Forming Analysis
however, i'd ask why is this production problem happening now ? presumably, these parts have been in production for a while ... isn't deep drawing a process that is "tweeked" through prototyping ?
RE: Sheet Metal Forming Analysis
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RE: Sheet Metal Forming Analysis
RE: Sheet Metal Forming Analysis
corus
RE: Sheet Metal Forming Analysis
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RE: Sheet Metal Forming Analysis
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RE: Sheet Metal Forming Analysis
RE: Sheet Metal Forming Analysis
Never heard of it. In industry I bet though that probably 90% of people involved in the modelling of this type of work (sheet forming) do not account for this crystallographic texture you mention, principally because of the UMAT development cost, which is astronomic.
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RE: Sheet Metal Forming Analysis
RE: Sheet Metal Forming Analysis
Over-engineering whilst ignoring the simple big stuff is to be avoided.
I could say the same of high strain fatigue and fracture. I have yet to find a component, which cracks, which can't be fixed by re-design in such a way that the stresses become so low that you can throw detailed fatigue calcs out of the window.
RE: Sheet Metal Forming Analysis
RE: Sheet Metal Forming Analysis
"Good sheet has good microstructure".....yeah initial microstructure might be good, but microstructure continuously evolves during plastic deformation.As the microstructure changes during deformation, so does the mechanical properties of the material and hence influences the forming of a sheet.
Well, in industry people normally don't take texture into account as it is computationally prohibitive and much complex topic to understand. Moreover, texture causes anisotropy and dealing anisotropy in the analysis(keep in mind that it continuously changes during deformation) is not a trivial task.
The above info may not be useful to get immediate results for the problem at hand. Anyways just my 2 cents...