Hello Sir, Do you have a picture before the insulator/Covering is placed - Assembled Strain gauge picture? is it possible to have a conversation via email ? please do let me know. would be great to discuss a little bit about the same test am trying to do.
Hi Dynatech, We are doing currently same testing but we have some doubt. Whether we have to use bridge factor 4 ? In tce. What's the calculation for full bridge
I assume you are asking about the scaling factor for the bridge. In this case since 2 of the gages are in full tension along the axis, and two other gages are in poisson compress in the transverse direction, the scaling factor will be 2.6. You have to divide the output of the bridge by a factor of 2.6 to get the true strain. I hope this answers your query,
Dynatec India thanks sir for useful information.but i thought if used same gage configuration for bending means may be we have to use 4 as bridge factor. Could you please give madhematical expressions for above 2.6 bridge factor...means how it comes.?
The gages and configuration shown in my video are for axial force measurement on the bolt. In this case , two gages along the axis will give full output, while the two gages along the perpendicular direction to the axis will give negative 0.3 times the output measured along the axis. Hence the total output of the 4 gages will be 2 ( for the axial gages) + 0.6 (for the transverse gages). If you want to measure bending strain on the bolt, then there should be two gages at one point on the bolt, and two more gages at diametrically opposite point on the bolt. All the 4 gages must be along the axial direction of the bolt. These gages must be located in the plane of the bending. One set of gages will be in tension and will give full output, the other set will be in compression and will give full output also. In this case the scaling factor will be 4, and you have to divide the output from the bridge by 4 to get the strain on the bolt. Regards, Vijay
bhai plz mujhy hindi mein bataein k loadcell k ander ki wiring jo k bareek wir se hoti he who kesy karni hoti he
Hello Sir, Do you have a picture before the insulator/Covering is placed - Assembled Strain gauge picture?
is it possible to have a conversation via email ? please do let me know. would be great to discuss a little bit about the same test am trying to do.
Hi Dynatech,
We are doing currently same testing but we have some doubt.
Whether we have to use bridge factor 4 ? In tce.
What's the calculation for full bridge
I assume you are asking about the scaling factor for the bridge. In this case since 2 of the gages are in full tension along the axis, and two other gages are in poisson compress in the transverse direction, the scaling factor will be 2.6.
You have to divide the output of the bridge by a factor of 2.6 to get the true strain.
I hope this answers your query,
Dynatec India thanks sir for useful information.but i thought if used same gage configuration for bending means may be we have to use 4 as bridge factor.
Could you please give madhematical expressions for above 2.6 bridge factor...means how it comes.?
The gages and configuration shown in my video are for axial force measurement on the bolt. In this case , two gages along the axis will give full output, while the two gages along the perpendicular direction to the axis will give negative 0.3 times the output measured along the axis. Hence the total output of the 4 gages will be 2 ( for the axial gages) + 0.6 (for the transverse gages).
If you want to measure bending strain on the bolt, then there should be two gages at one point on the bolt, and two more gages at diametrically opposite point on the bolt. All the 4 gages must be along the axial direction of the bolt. These gages must be located in the plane of the bending. One set of gages will be in tension and will give full output, the other set will be in compression and will give full output also. In this case the scaling factor will be 4, and you have to divide the output from the bridge by 4 to get the strain on the bolt.
Regards, Vijay
Dynatec India thanks...for clearing the concept