Results 1 to 3 of 3
-
08-13-2014, 04:53 AM #1
- Join Date
- Mar 2014
- Posts
- 223
PLA and creep (slow deformation over time)
I noticed that PLA seems to suffer from creep, the slow deformation of a material under load over time. Or at least I think it does.
For example the landing gear legs of a multicopter I've printed several months ago have noticeably yielded over time just by sitting inside a cabinet for that time.
Temperatures in my apartment can go up to 35 degrees centigrade, so that may be a factor, but the glass transition temperature of PLA is supposed to be 60C.
I wonder if that may be the specific composition/manufacturing of the PLA I used or if it is just the way that material behaves.
Has anyone noticed this effect on PLA (or other material) prints?
-
08-13-2014, 05:58 AM #2
I use ABS for quadcopters only, PLA shatters and has no flexibility I find and makes for a too rigid frame at high speeds, and also the fact that after only 1-2 weeks, I was finding the arms , lets say F450 size, max build plate for me anyway, were warping upward, even with the special 'non'warping' addidions to it.
My ABS quads, some over a year old are still flying without any warp at all, and it gets to 40 - 45c here.
-
08-15-2014, 04:04 AM #3
- Join Date
- Jun 2014
- Posts
- 349
Yes some material can droop like that. Some materials can even be described as "supercooled liquids".
Qidi X Plus 3 Paper thin first...
Yesterday, 01:15 AM in General 3D Printing Discussion