Question:
Long long ago someone told me about a small sheet of "paper" wich could give
a measure of the stress applied over it.
Do you know anything about it? Where to buy?
Answer:
Pressure and stress although different concepts, have same units. Following
link has information on pressure sensitive film that may be of interest to
you:
http://www.sensorprod.com/pressureex.
You don't mean a strain gauge? When you know the material characteristics
this can give you the stress in the material.
I have seen a film that changes color based on the amount of
stress applied.
I have seen this advertised in Machine Design. By visiting their
website at http://www.machinedesign.com then clicking on "Find a
Supplier" and searching for "stress indicator" I get an
acceptable number of hits...
I used it sometime back but cannot recall the exact name. It starts with
Fuji. You could do a search.
In their advertisements one of the applications was to measure the
compression force of the rubber seals on automotive doors.
