Column Loading Analysis: Strain and Stress Graph for Tubular Support

[oxon88]

post #13 has the correct figures.

 

[Big Jock]

Thanks, and this part...

show how four strain gauges can be used in
conjunction with a Wheatstone bridge to give maximum sensitivity
of the load measurement system.With the aid of sketches show how four strain gauges can be used in
conjunction with a Wheatstone bridge to give maximum sensitivity
of the load measurement system. Show clearly the orientation of the
strain gauges on the tubular column and the positioning of these
gauges on the Wheatstone bridge

 

[oxon88]

take a look here: http://www.omega.com/faq/pressure/pdf/positioning.pdf


for this question, i explained how the circuit works and what the benefit is using the wheatstone bridge circuit. look at figure D in particular for the positioning of the strain gauges.

 

[Big Jock]

quick couple of questions and many thanks so far.

Have you had this all marked??

Also the table in post#13 are the same values I had calculated for the graph of the expected strain against the applied load. How do these work then for the graph of strain against applied load when the strain gauge is in
the new position?? Just a bit confused?

 

[oxon88]

yes it has been marked as correct. I achieved distinction grade.

for the first graph, it wil be Transverse Strain Vs Load

for the second, it will be Longitudinal Strain Vs Load

 

[Big Jock]

Magic Oxon88 and well done some of these questions are tough to say the least. I will keep working away and try and get it all done. Many thanks for your help. Hopefully in the future I will be able to repay the favour...

 

[Big Jock]

Oxon could you upload the Longitudinal Strain Vs Load graph please

 

[oxon88]

 

[Big Jock]

Thanks Oxon88 for your great help

 

[Big Jock]

Your graph Oxon what have you used for the x axis?