I am interested in this as well. We have just started trying to work in this area more.
In general to get good material data you have to create it yourself. I am sure that some vendors provide reliable data including various nonlinearities however I have found many do not. Most provide only a modulus. I have found experimentally E to be off by 50% relatively often. In short don't trust the data unless your FEA correlates with an experimental test or you have compared the vendor data with some you created your self. I hope this helps.
we are doing many nolinear simulation with plastic part, and most of the time we are taking the Von-mises curve from Campus. We have to creat each time the material ! it not the best but after a couple of month we have most of them available.
Of course ba doing this we are considering the Part as isotropic and have to take some safety coeficient ( about 10% below the limite given in Campus ).
I did an overview for the limit we are taking depending of the situation and the typ of constraint ( see attachment ).
limit-plastic-FEM.jpg 156.2 KB
I think if you want accurate properties at a range of temperatures the universities are a good place to start. I've contacted a local university and they've expressed an interest. I noticed that a plastic pipe supplier has highlighted in their discussion on HDPE that Young's Modulus is time dependent. Maybe another thing to test.
Doing some design work with plastics at the moment also and am having the same problems with material properties. And yes the plastics suppliers don't seem to be much help. Matweb has got a lot of rubbish on their site and trying to find the good stuff is tricky when you are looking at anything a bit unusual. Worth a try anyway. So it looks like organising some test work is the order of the day especially if you are going to look at properties at different temperatures. I remember at uni one of the blokes was doing a project on testing plastics. He had a wood box and some pieces of plastic beams simply supported. The box was insulated and could be heated. You hung a load off the centre of the beam and recorded the deflection. This could be used to work out the elastic (or is it flexural) modulus. Its slightly different to a standard usiaxial tensile test but its probably better than a lot of the stuff you get off the net.
This is my first post on this new forum. Why are all the letters going wonky? No I haven't had too much to drink.
Interactive version is called WebView, but also I recommend downloading and installing their offline version, WebUpdate.
Atlas of Stress-Strain Curves (mostly metals), where SWS gets its curves from: http://books.google.com/books?id=up5KS9fd_pkC
Aerospace metals, formerly called Mil-HDBK-5: http://tinyurl.com/l5583b (70.4 MB zip)
For non-typical or hard to find material properties, the hard fact is that you will need to have a testing lab get the properties needed for FEA. Two labs that specialize in providing data for FEA are: Datapoint Labs and Axel Products, Inc.Axel Products, Inc.
2255 S. Industrial Hwy.
Ann Arbor MI 48104
Phone and Fax:
Fax: +1-734-994-8309Datapoint Labs
95 Brown Rd. #102
Ithaca, NY 14850
Toll-Free (US only): 1 888 DATA-4-CAE
Phone: 607 266 0405 Fax: 607 266 0168
Contact by e-mail: email@example.com
I cannot download the zip 'tinyurl' it seems to be unavailable... can you redirect me to the file?