- Laboratory Report Template Experiment 1 Measuring The Strain Of A Bar Under Bending 1 In Step 2 G What Values Did Yo 1 (73.76 KiB) Viewed 23 times
- Laboratory Report Template Experiment 1 Measuring The Strain Of A Bar Under Bending 1 In Step 2 G What Values Did Yo 2 (43.48 KiB) Viewed 23 times
- Laboratory Report Template Experiment 1 Measuring The Strain Of A Bar Under Bending 1 In Step 2 G What Values Did Yo 3 (50.97 KiB) Viewed 23 times
- Laboratory Report Template Experiment 1 Measuring The Strain Of A Bar Under Bending 1 In Step 2 G What Values Did Yo 4 (45.23 KiB) Viewed 23 times
- Laboratory Report Template Experiment 1 Measuring The Strain Of A Bar Under Bending 1 In Step 2 G What Values Did Yo 5 (42.75 KiB) Viewed 23 times
- Laboratory Report Template Experiment 1 Measuring The Strain Of A Bar Under Bending 1 In Step 2 G What Values Did Yo 6 (58.84 KiB) Viewed 23 times
- Laboratory Report Template Experiment 1 Measuring The Strain Of A Bar Under Bending 1 In Step 2 G What Values Did Yo 7 (76.24 KiB) Viewed 23 times
- Laboratory Report Template Experiment 1 Measuring The Strain Of A Bar Under Bending 1 In Step 2 G What Values Did Yo 8 (50.43 KiB) Viewed 23 times
3) Calculate the relative ppm" by subtracting the no-load reading from each of the subsequent readings: relative ppm = ppm - (noload reading) Strain 1 Pressure Strain 2 relative ppm relative ppm O bar 5 bar 10 bar 15 bar 20 bar 25 bar 30 bar O bar (release the load) 30 bar 35 bar 40 bar 45 bar 50 bar 55 bar 60 bar O bar (release the load)
4) What was the value that you calculated for the area of the piston inside the ram (step 5a)? m АН 5) Record the pressure (in Pascals), and force (in Newtons) corresponding to each pressure, calculated in part 5: Pressure (bar) Pressure (Pa) Force (N) O bar 5 bar 10 bar 15 bar 20 bar 25 bar 30 bar O bar release the load 30 bar 35 bar 40 bar 45 bar 50 bar 55 bar 60 bar O bar release the load
Strain 2 6 6) Record the values calculated for the strain (€) in step 5b: Strain 1 Pressure O bar 5 bar 10 bar 15 bar 20 bar 25 bar 30 bar O bar release the load 30 bar 35 bar 40 bar 45 bar 50 bar 55 bar 60 bar O bar release the load
7) Show the bending moment and shear force diagrams calculated in step 6a). Indicate the values of bending moment and shear force at the key points. 8) Record the theoretical values calculated for the strain (€) in step 6c). Strain Strain Gauge 2 Pressure Gauge 1 E E O bar 5 bar 10 bar 15 bar 20 bar 25 bar 30 bar
9) For the initial loading from O bar to 30 bar (steps 42-41), draw a graph of the Strain vs. the Applied force for each strain gauge. Use the two blank graphs below. (note that one of the graphs Recommodates negative strains). Include the theoretical values for strain that you calculated in step 6 Measured Strain 0.0015 0.001 Strain 0.0005 0 0 1000 4000 5000 2000 3000 Applied Force (N) Legend Experiment: Theory Distance that this strain gauge is from the hydraulic ram Measured Strain Applied Force (N) 2000 3000 4000 5000 1000 0 0 O O -0.0005 Strain -0.001 -0.0015 Legend: Experiment Theory Distance that this strain gauge is from the hydraulic ram
10) How closely do the strains return to their initial values the first time that the load is removed (after the initial 30 bar loading) (step 4)) ? 11) For the strain gauge located on the bottom face of the beam, 5 cm from the midpoint of the beam, draw a combined graph of the measured strains in both of the loadings • 0 to 30 bar (step 4e to 4) and • beyond 30 bar (step 4k to 4n) Measured Strain 0.004 Strain 0.002 8000 10000 0 0 2000 4000 6000 Applied Force (N) Legend: Experiment Distance that this strain gauge is from the hydraulic ram 12) After the material yields, the strain will not be linearly related to the applied force. Use this to identify the values of applied force and strain at which the material under this strain gauge yields 13) After the second loading is released (step 4n), how closely do the strains return to their initial values? 14) Is this to be expected and why?
15) As the steel yields, the oxide layer tends to take off its surface. Reproduce the sketch you made of the front surface of the bar, near where the force was applied (step 40). What does this tell you about which parts of the bar yielded first? In step 51, what did you observe about the pressure reading when high pressures were applied? Try to explain why this happened