Question

Cantilever Testing Procedure 1. Check dimensions of the bar stock aluminum. You should record the width and thickness with a caliper and then use the yardstick to measure the length of the bar to the table. Also record the distances to each of the sets of gages and the distance to the middle weight. The distances are fairly accurate so it is safe to round to the nearest whole inch, except for the distance from the free end of the beam to the table (keep this measurement exact). 2. Zero the recording device, known as the indicator, readouts by using the switch and unit's calibration knobs for each gage. (remember: it doesn't have to be perfectly zero. You are measuring a CHANGE. Therefore, when you record, let's say, an initial zero of +5 microstrain and after loading you read a value of +30, you can then do some algebra to figure out that the actual experimental value is really + microstrain). 3. Now with the device zeroed and the dimensions of the bar known we can now proceed to test different loading scenarios. We will be using different weights. One will ALWAYS (hint) be used for the end and the other will be used for the middle. 4. First test should be hanging a weight from the free end. Once you choose a weight for the free end you must use the same one for all of the trails. Measure the off of the strain indicator for each gage. Note the positive and negative signs. 5. Repeat the trails for an intermediate load and then both loads.

Answer 1

Cantilever Procedure: Says That-

AS, . zero the recording device, known as the' stain indicator and the readouts by using the switch and balance unit's Calibration knobs for each stage (we have say it doesn't have to be perfectly zero and you are measuring a ebange and the actual experimental value is really't'' microstain 37. Now the device zeroed and the dimentions of the bar known we can now proceed to test different loading senarious we will be using your different weights. one will always be used for the end and the other varying will be used for the middle. 4. First test should be hanging a weight from the free end once you choose a weight for the free and you must use the same one for all of the trails. measure the starain off the strain indicatos for each dage, and note the positive I and negative signs. ОАО Scanned with CamScanner