Hey everyone!
For a class project, I printed a bunch of ASTM standard dog-bone style samples and threw them in an Instron tensile testing machine at UT Dallas.
I tested Inland PLA, Hatchbox ABS, and some NinjaFlex semiflex. The PLA and ABS performed as expected–about 45 MPa ultimate stress each, brittle failure for PLA and semibrittle for ABS. The Semiflex, however, stretched 760% before failing (at 20 or so MPa)! Amazing!
Here’s a picture of the samples (from left to right: ninjaflex, PLA, ABS):
Here’s the ninjaflex a few seconds before it broke:
I am writing a report on these tests, which I’ll post later. It’ll have the details (precise yield strength, loads, elastic moduli, etc). Enjoy!