Just give the letter choice. A,b,c or d On the stress-strain diagram, which axis

Question

Just give the letter choice. A,b,c or d On the stress-strain diagram, which axis would have unitless numbers (e g . mm/mm or in/in or -/-)? On the stress-strain diagram, which axis would have units of force divided by area? On the stress-strain diagram, which axis would have units of area divided by force? Four solid, round bars are loaded in tension with the weights shown. In which one is the greatest stress developed? Four tensile test specimens are loaded with a load of 10,000 pounds. The length of each specimen is recorded before and after it is loaded. Which specimen underwent the highest strain? A grams is a unit of ? A kilonewton is a unit of ? A kilonewton is a unit of ? A megapascal is a unit of ? PSI are units of ? The kip is a unit of ? The ksi is a unit of ?

Explanation / Answer

1. stress = F / A = N /m^2

strain = deltaL / L = unitless

ans. (b)

2. that is stress.

Ans. (a)

3. there is nothing like that.

ans. (d)

4. stress = F / A = 1000 / (pi (0.5))^2 = 4000 lbs/in^2

= 2000 / (pi (1)^2) = 2000 lbs/in^2

= 3000 / pi(1.5^2) = 1333.33 lbs/in^2

= 4000 / pi (2^2) = 1000 lbs/in^2

Ans. a)

5.
strain = deltaL / L = (1.1 - 1) / 1 = 0.1

= 0.2 / 2 = 0.1

= 0.3 / 3 = 0.1

= 0.4 / 4 = 0.1

strain is same for all.

Ans(c)

6. (a)

7. b)

8. c

9. c

10. b

11. c

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