Strain guage question
Strain guage question
(OP)
I need to measure the negative strain after autofrettage (60,000 psi) of a thick walled vessel.
In the past, I have used special sealing glands to connect the strain gauges to the outside where I could record my data. However, these were expensive and prone to problems.
Would it be viable to:
1) install the strain gauges
2) record the "zero" point
3) disconnect the ohm meter from the strain gauge
4) autofrettage the vessel
5) measure the strain at the new strained condition
Is there anything wrong with my logic?
roadapple
In the past, I have used special sealing glands to connect the strain gauges to the outside where I could record my data. However, these were expensive and prone to problems.
Would it be viable to:
1) install the strain gauges
2) record the "zero" point
3) disconnect the ohm meter from the strain gauge
4) autofrettage the vessel
5) measure the strain at the new strained condition
Is there anything wrong with my logic?
roadapple





RE: Strain guage question
RE: Strain guage question
Doesn't a particular resistance translate to a particular strain - in this case it would be negative.
RE: Strain guage question
How do you calibrate your SG's? This may be problematic with all of the handling.
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