Ce Board Strength reviewer

CE BOARD REVIEWER

DESIGN: STRENGTH OF MATERIALS zherrinore

1.

A 12 mm thick steel tire has a width of 110mm and has an internal diameter of 00 mm. The tire is heated and shrunk to steel wheel 800.5 mm diam. E=200Gpa a.

Determine the tensile stress in tire

b.

Determine the compressive pressure bet the tire and the wheel

c.

Determine the thickness of the tire to resist a pressure of 1.5 MPA if it has an allowable stress of 124 Mpa

2.

Six steel cables are supporting a circular heavy moulding of diameter 2m from an overhead point. If the moulding weighs 2.5kn/m and the attachment point is 3m above it determine the following: a.

Tension in each steel wire

b.

Diameter of the wire that will not exceed tha allowable stress of 124 Mpa

c.

If he wire is 10 mm in diameter, find the vertical displacement of the moulder

3.

A water tank 3 meters in diameter and meters high is made from a steel having a thickness of 12 mm a.

When the tank is filled with water, determine the circumferential stress

b.

Det. The longitudinal stress at the bottom of the tank

c.

If the circumferential stress is limited t 5MPA, what is the max. Height of water o which the tank may be filled.

4.

A hollow circular pole mm thick with 300 mm mm outside diameter and height of 3 m weighs 150 n/m. The pole is subjected to the following vertical load p=3KN at an eccentricity e=100mm from the centroid of the section. Lateral force h=.45kn at the top of the pole a.

Determine the maximum compressive stress at the base due to combined loadings

b.

Determine the maximum ensile stress at the base due to combined loadings

c.

If the hollow pole is replaced by a solid wood pole of 250mm diameter determine the maximum shear stress at the base

5.

A W420x45 steel beam is fully restrained with a uniformly distributed super imposed load of 25 kn/m. The beam has a span of 10m. Properties of W420x85 A=10839mm

a. b.

2

tw=11mm

bf=10mm

d=420mm

tf=18mm

Ix=310x10 mm

6

4

Compute the bending stress in MPA Compute the average shear stress in he web

c.

Compute the maximum shear stress in the web

6.

A cantilever hollow circular bar 5 mm thick with outside diameter of 75 mm is subjected to a torque 3 kn-m at its free end. Find the max shear stress in the bar

7.