Tensile Strength Test Specimens

thingiverse

UPDATE 3: New models are now live! Check them out here: http://www.thingiverse.com/thing:1993441 UPDATE: I'm currently designing a state-of-the-art testing machine that will revolutionize the way we test materials. Along with it, I'll be creating all-new test pieces that will raise the bar for our industry. I'll post them soon, but for now, this update remains as a reference point for anyone who wants to compare my latest videos against my earlier ones. ORIGINAL: If you want to replicate my tests on your own machines, here are the specimens I've been using in my videos that test the tensile strength of various filaments. If you decide to conduct some testing, please let me know how it goes! There are two designs available: (1) This model is meant to be printed upright for evaluating the bonding strength between layers. It's the larger piece with a wider base, making it easier to stick to your bed. You'll also notice that I made it bulkier overall because sometimes I experienced unusual failures at the holes rather than the center, where it was supposed to break. (2) This design is meant to be printed flat against the table for testing the extruded tensile strength of filaments more directly. The central cross-section is intended to be 0.2" x 0.2", but make sure to measure it with calipers before breaking. To get the tensile strength in psi or MPa, simply divide the breaking strength measured by your scale. Here are the videos that feature these specimens: Nylon 910: https://youtu.be/48NC0KDmcBo ABS: https://youtu.be/JXeeRhoriIo PLA: https://youtu.be/cOW34xhtNM8 PETG: https://youtu.be/z7rTwPCygtM