{[ promptMessage ]}

Bookmark it

{[ promptMessage ]}

3313Q4Sp02

# 3313Q4Sp02 - Answer any 4 Questions only 1 point tl Name...

This preview shows pages 1–2. Sign up to view the full content.

tl ENSC 3313, Spring 2002 Quiz 4 Name Answer any 4 Questions only, 1 point each A .flill tensile test specimen, of gauge length 2 inches and width 0.5 inches, was cut from a sheet of thickness 0.1 inches. The load-elongation plot is as shown. Calculate a) the elastic modulus, b) yield strength, c) tensile strength, d) % elongation. Cross section area = 0.5 x 0.1 = 0.05 in2 Stress = Load/ Area Gauge length is 2"; strain = elongation/2 a) E = (1500/0.05)/(0.006)/2 = ~ b) YS ~ 2000/0.05- 40,000 psi (approx) c) TS 5800/0.05- 116,000 psi d) % Elongation (0.54/2) lOO = 27% Under what conditions is this an appropriate stress strain curve for a steel? Explain! 2. About no strain hardening, high elongation, and high reduction in area, all indicate that we are in the hot work region, well above the recrystallization temperature. The temperature could be lOOO°C. a / E A tensile specimen (2.5 cm long x 0.25 cm diameter) is stretched uniformly to 3 cm, whereupon it begins to neck under a load of 20,000 N. Calculate the engineering and true stresses and strains at necking.

This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}

### What students are saying

• As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

Kiran Temple University Fox School of Business ‘17, Course Hero Intern

• I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

Dana University of Pennsylvania ‘17, Course Hero Intern

• The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

Jill Tulane University ‘16, Course Hero Intern