View Stress in Transparent Materials - Recycled LCD Polarizers

Many clear materials will twist the polarization of light when under stress. Stress can be seen by placing the material between two polarized sheets.

Polarized sheets can be removed from old LCD panels.

Category:

Education

Tags:

• Jeri Ellsworth
• FMCG
• Stress
• visualize
• polarized
• CLD
• Recycle
• LCD
• DIY

[parmismahdis100]

You Should say: View Stress in Transparent Materials

[jeriellsworth]

@parmismahdis100 Good point.

[blenderuser]

Very informational! Maybe that explains why I always see patterns in the car windows, when I am wearing sun glasses..? It's different from car to car, but it mostly looks somewhat like moiré patterns.

[jeriellsworth]

Very possible.

[siouxsettewerks]

Hi, nice info!

Is there a neat way, tips or tricks, to cleanly removing polarizers from lcd screens?

The only try I made was solvent hell, and it didn't help...

Would the freezing effect of dry air cans you used on removing mylar from pinball decks be a good trick for that also?

Thanks a lot!

Btw, I am in awe, you are quite the Polymath!

Some video would make me feel so dumb, and then, there was your video on failure and learning!

YOU RULE!

[Jun127]

She would be a really good teacher. :)

[thecheatdx]

Therefore, if you can determine the color at an edge where one principal strain is zero, you can determine absolute strain. When a part is not conveniently translucent, a reflective paste/adhesive and a transparent plastic plate that becomes pliable when heated is attached to the part. This allows you to determine a strain field on nearly any surface that can be followed by the plastic.

[thecheatdx]

You have fashioned a very simple polariscope! I've used these when determining stress concentration factors on parts that have already been manufactured and it is inconvenient to construct a finite element model. Based on the color boundaries, you can determine the relative strain field. Due to the way birefringence works, the colors seen are directly proportional to the difference in strains in the two orthogonal principal stresses.

[azayles]

Jeri, you should make a rotatable polarising lens attachment to fit onto the camera, maybe attaching it with NiB magnets

[lexichronicle2]

that's going in the favourites! very neat. scientific glassblowers do use these to look for stress in the joints after blowing and then again after annealing the glass (which is supposed to equilibrate the stress)

[CamsYT]

Well I know what I'm going to do with this defunct 28" LCD monitor now...

[AMiGR667]

Indeed it is. You have a good pair of sunglasses then. :-)