Question

1 Figure 2. The specimen was loaded to 7 You have been provided the tensile test results shown in Figure 2. The specimen fracture. Using these results, determine the following: Young's Modulus (3 points). The Yield Stress at 0.2% offset (3 points). The Ultimate Tensile Stress (1 point). The percent elongation at failure (1 point). • The toughness of the material (2 points). --- - -- Stress (o) (MPa) 0.04 0.035 0 0.045 0 0.005 0.01 0.015 0.02 0.025 0.03 Strain (mm/mm) Figure 2. Stress-Strain Tensile Testing Results.

Answer 1

7. Young's Modulus !-(E] It is the slope of Clastic limit, linear curve up to 35077 كونه A to Y2-4, X2-201 . 350-0 0.005-0 16=70000 MPa] Yield stress at 0.2% off sct !- Yield Stress 1260F-----7 yield point - - 350 y Lo.24. offset 0.002 --. Yield stress at 0.2%, offset = 360 MPa Capprox)

The ultimate tensile stess :- Peak Stress 430 350 Mpa (6) 0.005 (E) (0.042) - The ultimate tensile stress = 430 MPaf Capprox) The 4. elongation at falure's y From the above graph, the Speamen Jails at peak stress So Corresponding Strain = 0.042 -- Y. elongation falliere = 0.0428100 54.2%.] The toughness & materiel ! Toughness's Capacity of a material to absorb energy with out failure. - Aren under stress - Stain Curve upto S failure. Cas shown in above graph) - Areal trung & Area of trapeziod 3x0.05x350 + 5x (350+ 430)»[0.042-0.005] (15.35/31

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