TAGGED: error-explicit-dynamics, materials-problem
May 26, 2023 at 3:33 pmOzen26Subscriber
I tried to make tensile test analysis for pla specimen and ı have problem..
I couldn't find PLA (polylactic acid) so ı added PLA as a new material fig.1. After ı ran some analysis on explicit dynamic and ı couldnt't see any fracture point, even ı saw exteremly high stress for pla's ultimate and yield stress. ı know ran with very small time but with the same time ı saw fracture with standart explicit aluminum fig. 4.
Thanks for help.
May 26, 2023 at 7:05 pmArmin_ASubscriber
I think you didn't specify any fracture criterion for your material so the source of element erosion may be due to reaching the Strain Limit (it is accessible in Erosion Controls under "Analysis Settings" in the project outline). The default value is 1.5.
May 26, 2023 at 8:01 pmOzen26Subscriber
ı had been tried to change Erosion Controls value right now. Like a 0.5,1, 1.5 and 3. but it didn't change. how can ı determine fracture point for PLA material?
May 26, 2023 at 8:11 pm
May 26, 2023 at 8:13 pmArmin_ASubscriber
I see...I believe fracture strain of materials is best to be determined experimentally. If you look it up online, you might find other researchers or labs who reported this information for your particular material.
May 26, 2023 at 8:24 pmOzen26Subscriber
I found article about PLA's fracture strain. It says 0,8. I will check. Thanks for helping Armin.
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