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Cheers guys, sure, my lack of any real knowledge of chemical plant/process/product is letting me down alright. However, the type of facilty I'm primarily interested in obtaining a process diagram for would be one producing bulk active pharmaceutical products. (Not sure if that sheds...

Hello all, I have been scanning the net for a diagram of the configuration of a typical pharmaceutical plant with little joy! Basically, I just want a flow diagram (or block diagram) of how the various components link up in the process. I'm an Mech Engineer and not a chemical so that...

Hi all, could anyone please give me the formula for the partially plastic moment for a circular section explaining the terms. I have one here but think it's wrong:- Mpp = yield stress/6 x (2 x (outside dia.**2- elastic dia.**2)**1.5 - outside dia.**2 ) where ** denotes to the power...

Hi all, thanks for the suggestions guys. Well, this is a strange one alright. All the points that you guys have raised have been based on good sound knowledge. I know that because I've spent the last few months researching this area. Now, I've got two models working for the cold forming...

Hi again bradh, that's a good point and one I'm aware of. However, Ansys has only 2 material models that examines rate dependent plasticity. Anand Viscoplasticity is one, the other(s) are by Perzyna & Pierce, both of these two are basically the same. The later ones are more or less...

Firstly thanks Bradh for your interest, as for the code, I'm using Ansys 6.1 for my modelling. I have a funny feeling that it will not (whatever is tried) incorporate a negative strain rate sensitivity value. indeed the negative strain rate sensitivity situation is not that common. It comes...

Hi all, my query deals with Voce constants in his constitutive law. I need to know three (of 4) material constants in the law for implementation in the Ansys design package, outside of the yield stress, for 316L Stainless steel. Hope you can help, Eoin

Hello everyone, my problem deals with the strain rate sensitivity parameter in Anand's Viscoplastic model, m. Unfortunately this parameter cannot be input as negative in the model when in fact the behaviour of my material is characterised by negative strain rate sensitivity. i.e in my...

Hi all, basically I'm looking at the rate dependent behaviour of 316L stainless steel wire (18 thou)in a cold forming process. I'm using Ansys to model this behaviour. Problem is that I do not know much about the material parameters for Anands viscoplasticity material model. Can these be...

My problem is as follows, I have tested (tensile) stainless steel 316L wire(18 thou) at various strain rates to ascertain its rate dependant behaviour. Since the wire is highly cold drawn (>85% reduction in area) in the manufactured state, ant further increase in cold work, with increasing...

I am enquiring about the times required for stress annealing 316L wire, 18 thousands of an inch diameter,. I intend that stress annealing will improved the ductility of this highly cold worked wire (> 85% reduction in area) for a subsequent cold-forming opertaion. Corrosion resistance is an...