Best Adhesive for Strain Gage on Steel | 10% Strain

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In summary, the conversation is about a recommendation for an adhesive to glue a strain gage to steel. The suggested adhesive is a very thin layer of cyanocrylate, although there are concerns about debonding at high strains. The person also recommends checking with the strain gauge manufacturer for their recommended adhesive if using expensive strain gauges. They also mention a resource for purchasing adhesives. Finally, there is a question about the possibility of 10% strain in steel.
  • #1
cs003
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Hi,

Can anyone recommend a good adhesive to glue a strain gage to steel? Ideally it would be something readily available at a hardware store or something like that. The expected strain will be approx. 10%... hopefully less, but possibly slightly more.

Thanks!
 
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  • #2
The only thing that comes close is the very thin cyanocrylate. I would worry that using that would result in debonding at high strains. However, if it has to be something from a hardware store, that's probably your best bet. Your prep work prior to the bonding is also of the utmost importance.

I would highly recommend looking here and purchasing from them:
http://www.vishay.com/accessories/adhesives/

http://www.vishay.com/docs/11011/bondae10.pdf
 
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  • #3
Super glue, a very very thin layer.

That's what I've used in the past, although the strains I have been measuring were quite low.

Obv, its only worth using super glue if you have cheap strain gauges. If you start getting expensive ones, see what the manufacturer reccomends you use.
 
  • #4
10% strain in steel? How is that happening?
 

What is the best adhesive for strain gage on steel?

The best adhesive for strain gage on steel is typically a two-part epoxy adhesive. This type of adhesive has been shown to have a strong bond to steel and can withstand high levels of strain without losing its adhesion.

How much strain can the adhesive withstand?

The adhesive should be able to withstand at least 10% strain, as this is the level of strain that is typically measured with strain gages on steel. However, it is recommended to choose an adhesive that can withstand even higher levels of strain for added durability.

What factors should be considered when choosing an adhesive for strain gage on steel?

Some factors to consider when choosing an adhesive for strain gage on steel include the type of steel being used, the expected level of strain, and the environmental conditions the adhesive will be exposed to. It is important to choose an adhesive that is compatible with the specific type of steel and can withstand the expected strain and environmental factors.

Is surface preparation necessary before applying the adhesive?

Yes, surface preparation is crucial for achieving a strong bond between the adhesive and the steel. The surface should be clean, dry, and free of any contaminants or oils. Roughening the surface of the steel can also improve the bonding strength.

How long does the adhesive take to cure?

The curing time of the adhesive will depend on the specific product being used, but it is typically recommended to allow at least 24 hours for the adhesive to fully cure before applying any strain or load to the gage. It is important to follow the manufacturer's instructions for proper curing time and techniques.

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