Problem 1: A rectangular magnesium bar having a cross section width of 4.8mm and its length is six times of the width. The sample was subject to undergone stress-strain testing and was subject to deform in tension. Below is the load-elongation data was obtained during stress-strain testing until fracture. 2815 3715 31.85 31.875 690 1390 4070 4935 6425 7050 7170 6915 6250 31.75 31.765 31.78 31.81 32.07 32.705 33.34 33.975| 34.61 35.245 mm Answer the following: (a) Plot the complete data as engineering stress versus engineering strain. Show 2 sample computations. (b) Replot the first 7 data (Hint: It is advisable to have the strain (x-axis) increment by 0.002)
Problem 1: A rectangular magnesium bar having a cross section width of 4.8mm and its length is six times of the width. The sample was subject to undergone stress-strain testing and was subject to deform in tension. Below is the load-elongation data was obtained during stress-strain testing until fracture. 2815 3715 31.85 31.875 690 1390 4070 4935 6425 7050 7170 6915 6250 31.75 31.765 31.78 31.81 32.07 32.705 33.34 33.975| 34.61 35.245 mm Answer the following: (a) Plot the complete data as engineering stress versus engineering strain. Show 2 sample computations. (b) Replot the first 7 data (Hint: It is advisable to have the strain (x-axis) increment by 0.002)
Chapter2: Loads On Structures
Section: Chapter Questions
Problem 1P
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ANSWER ONLY A AND B
Transcribed Image Text:Problem 1: A rectangular magnesium bar having a cross section width of 4.8mm and its length is six times of
the width. The sample was subject to undergone stress-strain testing and was subject to deform in tension.
Below is the load-elongation data was obtained during stress-strain testing until fracture.
N 0
31.75 31.765
690
1390
2815
3715
4070
4935
6425
7050
7170
6915
6250
31.78
31.81
31.85
31.875
32.07 32.705
33.34 33.975
34.61 35.245
mm
Answer the following:
(a) Plot the complete data as engineering stress versus engineering strain. Show 2 sample computations.
(b) Replot the first 7 data (Hint: It is advisable to have the strain (x-axis) increment by 0.002)
(c) Determine the modulus of elasticity, yield strength at 0.002 strain offset, tensile strength and the
fracture strength. Show it on graph.
(d) Compute the modulus of resilience, ductility (in percent elongation) and working stress if the design
safety factor is 4.2
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