Hello all,
I am currently trying to make a bistable composite using the paper below as reference.
https://core.ac.uk/download/pdf/187093671.pdf
The current layup I am using is B6-a, and my setup is as follows.
I have a custom oven which reaches 225 C for 4 hours.
I have a brass tube 1 inch in diameter
I wrap my layup around one third of the tube in order to get a third of the tube.
My fiber glass is +45/-45, 300gsm (couldn't find 200gsm)
I have experimented with the following layups (From outside to inside)
0.5 PP/300 GF
0.5 PP/2x300 GF
0.5 PP/3x300 GF
I have ptfe coated glass fabric paper sandwiching both sides of the layup with a tight winding of heat shrink tape to hold it all together and apply compression in the oven
The problem I am having is that almost all of the composites I have produced have ridges from the tape where they did not compress fully or enough and thus the plastic is not fully impregnating the fiberglass at some places, leaving me with a composite that is not fully bistable in some parts. If anyone has any suggestions on how to fix this, or even general suggestions relating to my process, or perhaps even somewhere I could get these manufactured for me, I would greatly appreciate it.