Question

Wondering if I am doing these calculations correctly I have a lab report due today.

Questions

Load	P1 = 0 lb		P2 = 350 lb		P3 = 700 lb
Gauge #	Strain	Stress	Strain	Stress	Strain	Stress
1	1102		724		383
2	1876		1546		1324
3	2177		2179		2181
4	876		1204		1558
5	662		989		1296

Sample Calculation:

5. = s / e

(10,600,000 psi)*1102 = 1.168 x 10^10 lb

E = 10600 ksi = 10,600,000 psi

Answer 1

Now,

At, Strain ( e ) = 1102

Stress () = e * E

= 1102 * 10600000

= 1.16812 * 10¹⁰ psi.

[Note: Calculations and steps performed are absolutely correct. But it looks like you have considered too much higher strain value which is really not possible. I think given strain values are associated with 10^-6 or 10^-7 or so. I would like to request you to re-verify the strain values given (specially check for negative powers of 10). But anyhow I am providing the solution as per the details given.]

Similarly other stress values can be calculated.

Load	P1 = 0 lb		P2 = 350 lb		P3 = 700 lb
Gauge	Strain	Stress (psi)	Strain	Stress	Strain	Stress
1	1102	11681200000	724	7674400000	383	4059800000
2	1876	19885600000	1546	16387600000	1324	14034400000
3	2177	23076200000	2179	23097400000	2181	23118600000
4	876	9285600000	1204	12762400000	1558	16514800000
5	662	7017200000	989	10483400000	1296	13737600000

[ Just for your understandings I am showing one example with practically possible strain value.

If, e = 1102 * 10^-6

   = 10600 * 1102 * 10^-6

= 11.681 ksi

It looks like above value is in line with the real possible values]