step 1 first.
- What is the material you are modeling, and what model are you using? You should be using a hyperelastic one...right? Do you have material data? What modes of strech do you have? Marlow is a stable model, but only uniaxial data and calculates the other modes.
- What element...
If youre really brave you can try a nonlinear static simulation using the arc-length method as the iteration scheme. This will allow you to accurately identify the stiffness = 0 point of the curve (i.e. buckling point).
This method is not for the faint of heart and is normally reserved for...
Does anyone have a handle on an injectable grade silicone rubber that will stick to a polycarbonate alloy substrate (insert molded)? Wanted in black...
Thanks
craig
testing is essential depending on your application. Sometimes testing cost does not pay off! I have done simulations with both fully tested materials and also with a linear approximation and guess what...it didnt matter.
What Im trying to say is that some thought must be given to what you want...
basically your clamping pressure has to be greater than the pressure you are trying to withstand. For this you will need general material proprties and understand your geometry. Normally I use 25-35% comprerssion for most rubber type seals as a nominal value.
1. Pick a material
2. Assume a...
Actually my understanding is that polycarbonate is the most impact resistant material by itself (most energy absorbtion, even at low temp). The reason that ABS is added to PC is for molding purposes (it flows nice). Different companies use different amounts of each for their alloys.
Fun stuff...
Nigel,
The reason their curves start at 53C is probably because that is the transition temperature.
I did find a reference for Cycolac T (ABS)
As you would expect your yield actually goes up by 50%
Flextural yeild @73F = 10,500psi
Flextural yeild @-40F = 15,600psi
Probably a bigger concern...
I like "Finite element modeling for stress analysis" by Robert Cook. Easy to read...
If you are very technically minded you could go for the bible: "finite element proceedures in engineering analysis" by Bathe
Cory and Mike,
Yes RTV would be a bad choice...I wasnt thinking. Thanks for the hints and the name of the process, you both have been very helpful.
Cheers
CJ
http://www.mscsoftware.com/support/library/conf/auto00/p04500.pdf
Ansys also has a good nonlinear code :P
There is a test lab called datapointLabs that might be worth checking into.
http://www.datapointlabs.com/
Axel products is also, as you know from a previous reply, a good testing lab...
Dear Group,
I would like evaluate a new plastic prototype assymbly by cutting sections in the product so that I can see how internal parts are mated. Someone told me of a method where you cast (encapsulate) your prototype in an clear RTV resin. Once it has dried you take a diamond saw and cut...
There are some really good books out there regarding temp related material properties for engineering resins.
Try searching:
http://knovel.com/knovel2/default.jsp
This is a online reference book subscription sevice (download PDF pages), but I think that you can get a free trial membership...
Multiple load steps in WB can be acheived by adding script loading commands in the enviroment level. You will also need to add post script commands to see the different load step results.
An example:
In the command builder make a script file that says something like -
finish
/prep7
time,1...
Does anyone have any information on painting glass filled nylon? OR can you suggest a plastics painting expert that I can talk with (USA, preferably west coast).
Thanks
CJ
You can get material nonlinearity and fatique in Workbench.
Really it depends on which version of Ansys you get. Workbench itself will let you write in any capibilities inherent in your license. For example to do material nonlinearity in WB you would need Ansys Structural...
BUT Ansys is much...
