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1. A tensile test was performed using a standard 0.505 in. diameter specimen (Do 0.505 in) of 4140 steel with 2 inch initial gage length (Lo 2.00 in), and the following were determined: . Elastic Modulus (E)-30 x 106 psi Yield Strength (To) = 60,000 psi Strain at maximum load = 0.15 .Breaking Load (Pbreak) 15,000 lbs Maximum Load (Pa) 20,000 lbs 0 % Elongation-25% . a. (3 points) Calculate the stress at the break point: b. (5 points) Calculate the ultimate tensile strength: c. (5 points) Calculate the final gage length of the specimen: d. (5 points) Calculate the amounts of plastic strain and elastic strain at the point of maximum load during the tensile test:

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iven 0 A tensile test was performed uing a la per torm usina a diametere Specimen(b) 0:505 in . Specfcatonw are jiven by stoin vat mox oad 01s Ba load (Pcock) 15,000 clo inidal ageyt (l) -0in baenk bay, reA Break) Area els @reak) 15,o00 5,000 64000 879 , 39sbe vat e brea Pot ensi : 20,00o s 5,0o0 99 852-BPs;(4-2 셔>, 2 25ch final au4e length -2.5inch the amout ơa platic ghain and Rolalien by c Stiain iis Qiven y le. 2,000 - 2000 lo6 2x1b Strain ui aiven 91852.13 platic strain (Fr)-0-33

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