Q10: A cylindrical specimen of steel having an original diameter of 12.8 mm is tensile tested to fracture and found to have an engineering fracturestrengtho, of 460 MPa. Ifits cross-section diameter at fracture is 10.7 mm. determine 1) The ductility in terms of percentagereduction in area. 2) The truestress at fracture.

Q1. (i) Initial strain Please enter your supplied question data Q1. (ii) Eo B (hr¹Pa-¹) n IVICUITO Fracture 0.003 Please enter your answers here Your Q1. (i) Answers: 4.60E-34 Q1. (ii) 3.2 Q2. o (Pa) σo (Pa) 780,000,000 Q3. t (hr) Q2. A component is made from a metal that is known to be viscoelastic and behaves according to a secondary creep rate equation with constants of B and n provided as your input values. If the component is subjected to a constant force that results in the initial strain of E provided to you, determine the design stress for a secondary creep life of 1,000 hrs before attaining a limiting strain, &, of 0.01. Q3. If the same component is subjected to a constant displacement that results in the value of initial stress, o, provided to you, calculate the time for the stress to reduce to 200MPa. Young's modulus of the bolt is E = 200GPa.

A structural component in the form of a wide plate is to be made of a steel alloy that has a fracture toughness of 77 MPa.m ¹/2 and a yield stress of 1400 MPa. Inspection of the plate has identified an internal through the thickness crack of length 7.7 mm. Assume a value of Y=1. What is the maximum stress the component should be subjected to in order to not undergo rapid fracture.

1 Q 4 N Current Attempt in Progress 30¹ F1 A specimen of a 4340 steel alloy with a plane strain fracture toughness of 54.8 MPa m (50 ksi vin.) is exposed to a stress of 978.0 MPa (141800 psi). Assume that the parameter Y has a value of 1.18. - Your answer is partially correct. @ 2 (a) If the largest surface crack is 0.9 mm (0.03543 in.) long, determine the critical stress o. i 1608.13 (b) Will this specimen experience fracture? W S Yes v eTextbook and Media Hint Save for Later 38 command F2 # 3 E D 80 F3 X C $ 4 R MPa 000 000 F4 F % 5 V F5 T G 6 B MacBook Pro Y H & 44 N U 8 J Attempts: 1 of 5 used en l M 9 K DD F9 0 < H I -O L Submit Answer A F10 P V . t C F11 { command option [ + " = ? |