{[ promptMessage ]}

Bookmark it

{[ promptMessage ]}

quiz4spr01 - ENSC 3313 Spring 2001.nswer 1 anv 4 Questions...

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

View Full Document Right Arrow Icon
5'CI o~ Quiz 4 Name ENSC 3313, Spring 2001 .nswer anv 4 Questions onlv, 1 point each 1. A ~ tensile test specimen of gauge length 10 inches and width 2.5 inches was cut from plate 0.5 inches thick. The Joad- elongation plot is as shown. Calculate the a) elastic modulus, b) yield strength, c) tensile strength, d) % elongation. The width = 2.5", the thickness = 0.5". Therefore the cross sectional area = 1.25 in2. Hence, load/1.25 = Stress. The gauge length = 10"; hence strain = elongation /10. a) E -(7 ,000/1.25)/(0.01/1 0) -5.6 x 106 psi b) YS -9,000/1.25- UQQ psi c) TS -14,000/1.25 -11.200psi d) % Elongation -(0.092/10)100, -~ The temperature is 14 °K. This plot is inappropriate for a regular steel. Why? 2 150 This plot is for a ductile metal. Regular steels are BCC and brittle at low temperatures. (J (ksi) (Recollect overhead projector diagram 10-2, 0.6 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
Background image of page 1

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

View Full Document Right Arrow Icon
Image of page 2
This is the end of the preview. Sign up to access the rest of the document.
  • Fall '11
  • staff
  • Tensile strength, Tensile Test Specimen, gauge length, probable slip plane, brittle cleavage crack, probable slip direction

{[ snackBarMessage ]}

Page1 / 2

quiz4spr01 - ENSC 3313 Spring 2001.nswer 1 anv 4 Questions...

This preview shows document pages 1 - 2. Sign up to view the full document.

View Full Document Right Arrow Icon bookmark
Ask a homework question - tutors are online