1find the stress in both members shown

Question

1. Find the stress in both members shown below.

2. What steel specifications (types of steel) are suitable for structural applications?

3. A round bar of AISI 1020 hot rolled, 1 inch in diameter and 20 inches long, is subjected to a tensile of load 10,000 lbs.  Compute its elongation due to the stress.

4. A 1-inch square bar of A242 steel is 12 inches long and subjected to impact loading in tension of 10,000 lb.  The elongation is limited to 0.3% of the total length.  Compute the maximum allowable load.

5. A short post is made by filling a standard 8 x 8 x 1/2 structural steel tube with concrete.  The steel has an allowable stress of 21,600 psi.  The concrete has a rated strength of 5,000 psi but, in this application is to be limited to 2000 psi.  See section 2-10 in your text for the modulus of elasticity for concrete.  Compute the allowable compressive load for the post. 

6. A drive shaft transmits 90 HP of power at 200 revolutions per minute.  The drive shaft is 2 in. diameter and has a 1/8 in. deep groove that has a radius of 1/16 in.  The groove has a 2 mm radius.  Compute the torsional stress in the drive shaft.

Answer 1

Please make sure to consider the diagrams carefully and solve each part by applying the appropriate concepts and provide answers. 1) Determine the stress in both members illustrated below. 2) Illustrate what steel specifications (kinds of steel) are appropriate for structural applications? 3) A round bar of AISI 1020 hot rolled, 1 inch in diameter and 20 inches long, is subjected to the tensile of load 10,000 lbs. Calculate its elongation because the stress. 4) A 1-inch square bar of A242 steel is 12 inches long and subjected to the impact loading in tension of 10,000 lb. The elongation is restricted to 0.3% of the total length. Calculate the maximum allowable load. 5) A drive shaft broadcasts 90 HP of power at 200 revolutions per minute. The drive shaft is 2 in. diameter and consists of a 1/8 in. deep groove that consists of a radius of 1/16 in. The groove consists of a 2 mm radius. Calculate the torsional stress in the drive shaft.