hi, the pressure and radius and thickness is the same for all the strain gauges, so why the theoretical calculation is not the same for all of them as the stress is " Pr/s" and "Pr/2s" and strain is a function of stress?
Hi Narin, one of the objectives of the unit is to investigate an understanding of longitudinal stress, hoop (or circumferential) stress, radial stress, and biaxial stress, as well as other experiments, all that is possible to do thanks to the strain gauges being in different positions, distance and angles sensing a different kind of stress. Some strain gauges will read negative values (compressive) and others will read positive values (tensile), depending on the test, is possible to get similar values for some gauges, however, others will have a different value, and one of the objectives is to understand the why.
Hi Kwai, thank you for your message. If comparing your experimental findings to the theoretical findings please allow for a margin of error between the results as practical and theory will differ slightly but as longs as your calculations are not drastically dissimilar they will be accurate.
Jump to sections of interest:
2:04 fitting of the strain guages by Andi Wilshire
3:45 open end conditions experiment
hi, the pressure and radius and thickness is the same for all the strain gauges, so why the theoretical calculation is not the same for all of them as the stress is " Pr/s" and "Pr/2s" and strain is a function of stress?
Hi Narin, one of the objectives of the unit is to investigate an understanding of longitudinal stress, hoop (or circumferential) stress, radial stress, and biaxial stress, as well as other experiments, all that is possible to do thanks to the strain gauges being in different positions, distance and angles sensing a different kind of stress. Some strain gauges will read negative values (compressive) and others will read positive values (tensile), depending on the test, is possible to get similar values for some gauges, however, others will have a different value, and one of the objectives is to understand the why.
hi, can I get the softcopy of the lab sheets used for the practical?
Hi Pasindu, thank you for your message, please contact customer.care@tecquipment.com and they should be able to help you with this.
Why are the experimental strain smaller than the theoretical strains?
Hi Kwai, thank you for your message. If comparing your experimental findings to the theoretical findings please allow for a margin of error between the results as practical and theory will differ slightly but as longs as your calculations are not drastically dissimilar they will be accurate.
which oil is used??
Hello, Its PRYMAHYD-32 (Formerly- SHELL TELLUS S2 M 32 HYDRAULIC OIL.
Hope that helps.