I need answers to question (20).
Nono
Load (lb) Elongation (in.)
1,000 0.0010
2,000 0.0015
3,000 0.0020
4,000 0.0025
5,000 0.0030
6,000 0.0040
7,000 0.0050
8,000 0.0065
9,000 0.0080
10,000 0.0100
10,800 Rupture
Original length
Final length
Percent elongation
Original cross-sectional area
Final cross-sectional area
Percent reduction in area of elasticity represents the resilience or plasticity of a material. It is calculated by dividing the stress within the elastic limit by the strain at that stress. The modulus of elasticity provides a measure of the stiffness or rigidity of a material.
PROBLEMS
13. What is the percent reduction in area of a specimen with an original cross section of 0.505 in. and a final cross section of 0.502 in.?
14. What is the stress developed in a rectangular
15. What is the stress developed in a 35 cm rectangular MPa equals 145 lb/in^2.?
16. Would a steel beam measuring 23 in. be designed to withstand a 100,000 lb/in^2 load fail if it were used to support a 50-ton load? What is the maximum load it could support?
17. A 10 cm x 10 cm steel bar is used to support a continuous load of 100 MPa. What would be the maximum load it could support if the diameter were 0.750 in.?