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hmmmm, I see what you mean yes, but is there not a way of calculating Tw with out the need for R or h. For example, if you take in to consideration the simplifed equations for a flat plate. h = C(Tw - Ta / L)^n where C and n are constants q = h.A.(Tw - Ta) then through algebraic...

Hi Guys, Thanks for the input, Im still not sure if I follow how the best method of doing this is. If you follow the below link, it shows a set of graphs for heatsink performance. The first one, top left, shows the thermal resistance against Q. The graphs update in real time with user changed...

Hi IRstuff, I think you are correct, I have that many equations floating about that Im heavily confused and need a pointer. I have all the equations (based on the work of simmons and also using text book: Heat Transfer by J.P Holman) to calculate thermal resistance. However, I have seen...

Hi, Can any one help. I am trying to work out the thermal resistance of a heatsink. I have all the equations for doing so, however I want to plot a graph of the thermal resistance against different values of heat transfered Q. However, non of the equations I have for working out Thermal...

Hi Scott, It does not import as feature, but as a solid part in SW4, but only as surfaces in SW5. I have not come across your termanology before, what is sending it to VAR

Hi all, I have noticed something that you all might be able to able with. I have a step assembly file that when i import into SW 2004 I am able to open the parts and edit them (including cuts and chamfers, etc) I.E - its a full part. However, when I import to SW 2005, and open a part, the part...

Im not quite in the aerospace leauge (although I would do anything for a CAD job in that) but I do you use SW most days for solid modeling, sheet metal and drafting, and it is brilliant to use for drafting I feel.

Yeah I think its called a lance, Do you have to create the tool, or are there libaries of tools, cause I cant seemt o find one??

How is the best way to model an upform (like a cable tie up form) in sheet metal??

Hi all, I am looking to update our computer to run solidworks at a much more higher speed, main time lost is in waiting to big step files to import. First, what lower end graphics card that will support real view graphics, other than the expensive ones detail in the solidworks package (we use...

Got you, are there special repair tool you can use for this or do you mean you basically have to re model all the components??

Hi all, no i dont have part files, only the step file of the assembly. When I open the assembly up and go to the parts in the tree on the left, I select the part, right click, and go to open. As you say I think it imports only surfaces, I have tried the knit tool but that dont seem to work...

Hi all, Wonder if I can ask for some help and advice. I have Opened a part up from an assembly file, the assembly file was imported as a Step. However, I cant seem to edit the part as it says it is empty. Is there a way of changing the part to a full volume and not just an image or does it...

thanks for your help desert fox im right in saying the yield strength for steel is 172400000 Pascals, correct??? Also, The Tfp value, do I just keep it as 9 Nm or does it need to be in another form of units

thank you so Tfp is basically just the torque I want it to fail with What value of yielding shear stress shall I use for mild steel

do I use the equation on 398, if so, how do I find the modulus of rupture for a solid bar, this dont take in to account of the torque i want to apply though???

Got it, thanks, it dont make much sense to me know, goes on about soap films!!! which equation should I use

I have the sixth edition but cant find the section you mention, my section 9 is bending of curved beams

Got ya, is there a similar equation with thicknesses

thanks desertfox, In the equation you give in that thread, what is fp??, also how do i find out the yeilding shear stress of steel?? and how come the equation dont take in to account the thickness, which I need to find out??