To manufacture a piston with a circular cross section, an alloy steel bar is required whose length is fixed and has a value of 35 cm and must withstand a compression load of 5.2 tons. For its design, a safety factor of 4/5 is suggested with respect to the yield stress. The shear modulus for  1)During an accident, the piston rod receives an impact with an energy of 250 kJ / m³. Is the bar deformed elastically, plastically or does it fracture? justify your answer

Part B The stress-strain diagram for a steel alloy having an original diameter of 1.0 in. and a gage length of 7 in. is shown in the figure below. (Eigure 1) Determine the load on the specimen that causes yielding. Express your answer to three significant figures and include appropriate units. HA Py- Value Units Submit Request Answer Part C Figure t oft> Determine the ultimate load the specimen will support. Express your answer to three significant figures and include appropriate units. NO 70 60 50 P. - Value Units 40 30 20 Submit Bequest Answer 10 (in/in) o G04 0m 12 016 020 024 02 a aa omams Provide Feedback

Determine the size of a piston rod subjected to a total load of having cyclic fluctuations from 15 kN in compression to 25 kN in tension. The endurance limit is 360 MPa and yield strength is 400 MPa. Take impact factor = 1.25, factor of safety = 1.5, surface finish factor = 0.88 and stress concentration factor = 2.25.

A tie rod made of quenched and tempered 4340 steel is used as a critical linkage in an industrial apparatus. The rod is subjected to an alternating cyclic tensile/compressive stress from 550 MPa to -550 MPa. An inspection of the rod revealed a 3.5 mm deep edge crack on the surface of the rod. Please answer the following question for the rod given the properties in the table and curve below and fracture toughness of 55 MPa√m. (NOTE: Y=1.12 for edge crack and use “a” not “2a” for the length of the crack)  1. What is the minimum crack size that would cause instantaneous fast fracture at the current maximum axial tensile loading, assuming plane strain conditions apply? If the resolution limit of the flaw detection apparatus were 1.5 mm, would this flaw be subject to detection? Show calculations to back up your conclusions.