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Question 1 5 points A specimen of a 4340-steel alloy which contains an edge crack of...
A specimen of a 4340 steel alloy with a plane strain fracture toughness of 54.8 MPaym...
A specimen of a 4340 steel alloy with a plane strain fracture toughness of 54.8 MPaym (50 ksi n) is exposed to a stress of 1225 MPa (177700 psi). Assume that the parameter Y has a value of 1.04 (a) If the largest surface crack is 0.7 mm (0.02756 in.) long, determine the critical stress C- MPa (b) Will this specimen experience fracture?
Question 10 (7 marks) Suppose that a BMW car component fabricated from 4340 steel alloy having...
Question 10 (7 marks) Suppose that a BMW car component fabricated from 4340 steel alloy having a plane strain fracture toughness of 50 MPavm is exposed to a stress of 950 MPa. NDT results show there are two cracks. One is a surface crack of 0.60 mm long, and the other is an internal crack of 2 mm long. Will this component experience fracture? Why or why not? Assume that the parameter Y has a value of 1.0. Kjc: Plane...
Deformation and Fracture Mechanics 1. (Fracture toughness) (a) An AISI 4340 steel plate has a width...
Deformation and Fracture Mechanics
1. (Fracture toughness) (a) An AISI 4340 steel plate has a width W of 30 cm and has a central crack 2a of 3 mm. The plate is under a uniform stress, ?·This steel has a Kic value of 50 m2. Find the maximum stress for this crack length. (b) If the operating stress is 1500 MPa, compute the maximum crack size that the steel may have without failure. 2. (Plastic zone radius) The size of...
A steel (KIC = 132 MPa√m) ship deck plate is 30 mm thick and 12 m...
A steel (KIC = 132 MPa√m) ship deck plate is 30 mm thick and 12 m wide. It is loaded with a uniaxial tensile stress of 50 MPa and is in an enviroment below the ductile-to-brittle transition temperature. If a crack of length 2a=65 mm is present, find the factor of safety with respect to failure under the current loading conditions and estimate the tensile stress at which catastrophic failure will occur. You may assume β = 1.
A large plate is fabricated from a steel alloy that has a plane strain fracture toughness...
A large plate is fabricated from a steel alloy that has a plane strain fracture toughness of 75 MPam (68.25 ksi vin.). If the plate is exposed to a tensile stress of 347 MPa (50330 psi) during use, determine the minimum length of a surface crack that will lead to fracture. Assume a value of 0.94 for Y. mm
Chapter 9 1. What is the magnitude of the maximum stress that exists at the tip of an internal cr...
Chapter 9 1. What is the magnitude of the maximum stress that exists at the tip of an internal crack having a radius of curvature of 2.5 x 10-4 mm (10-5 in.) and a crack length of 2.5 x 10-2 mm (10-3 in.) when a tensile stress of 170 MPa (25,000 psi) is applied? 2. A large plate is fabricated from a steel alloy that has a plane strain fracture toughness of 55 MPa m (50 ksi in.). If the plate is...
1. A large plate is fabricated from a steel alloy that has a plane strain fracture toughness of 8...
1. A large plate is fabricated from a steel alloy that has a plane strain fracture toughness of 82.4 MPavm. If the plate is exposed to a tensile stress of 345 MPa during service use, determine the minimum length of a surface crack that will lead to fracture. Assume a value of 1.0 for Y. Maximum stress at tip of elliptically shaped crack Pt 2Ery, 1/2 critical stress required for crack propagation in a brittle material πα KIe YoeVra Fracture...
step by step solution please 3. The fatigue characteristics for a brass alloy are given as...
step by step solution please
3. The fatigue characteristics for a brass alloy are given as follows: Stress Amplitude (MPa) 170 Cycles to Failure 3.7 x 104 1.0 x 105 3.0 x 105 1 x 106 1 x 107 1 x 108 1 x 109 130 114 2 0 (a) Make an S-N plot (stress amplitude vs. logarithm cycles to failure) using these data. (b) Determine the fatigue strength at 4 x 106 cycles. (c) Determine the fatigue life for...
Ection A uestion 1 Hook's Law, state which variables are involtved it its calculation and explain...
ection A uestion 1 Hook's Law, state which variables are involtved it its calculation and explain, equations or text, how to determine it (2 marks) A1. The with a square cross-section 1 cm. Determine the direct stress test specimen is being subjected to a tensile load of 3.0 kN, as shown in figure specimen is composed of Titanium, the cylinder is being subjected to. Show your resulit in MNIm s cm Figure A1 Tensile test specimen (3 marks) c) How...
A wood beam (1) is reinforced on its lower surface by a steel plate (2) as...
A wood beam (1) is reinforced on its lower surface by a steel
plate (2) as shown in the figure. Dimensions of the cross section
are b 1 = 220 mm , d = 385 mm , b 2 = 190 mm , and t = 25 mm . The
elastic moduli of the wood and steel are E 1 = 12.5 GPa and E 2 =
200 GPa , respectively. The allowable bending stresses of the wood
and steel...
A specimen of a 4340 steel alloy with a plane strain fracture toughness of 54.8 MPaym (50 ksi n) is exposed to a stress of 1225 MPa (177700 psi). Assume that the parameter Y has a value of 1.04 (a) If the largest surface crack is 0.7 mm (0.02756 in.) long, determine the critical stress C- MPa (b) Will this specimen experience fracture?
Question 10 (7 marks) Suppose that a BMW car component fabricated from 4340 steel alloy having a plane strain fracture toughness of 50 MPavm is exposed to a stress of 950 MPa. NDT results show there are two cracks. One is a surface crack of 0.60 mm long, and the other is an internal crack of 2 mm long. Will this component experience fracture? Why or why not? Assume that the parameter Y has a value of 1.0. Kjc: Plane...
Deformation and Fracture Mechanics
1. (Fracture toughness) (a) An AISI 4340 steel plate has a width W of 30 cm and has a central crack 2a of 3 mm. The plate is under a uniform stress, ?·This steel has a Kic value of 50 m2. Find the maximum stress for this crack length. (b) If the operating stress is 1500 MPa, compute the maximum crack size that the steel may have without failure. 2. (Plastic zone radius) The size of...
A large plate is fabricated from a steel alloy that has a plane strain fracture toughness of 75 MPam (68.25 ksi vin.). If the plate is exposed to a tensile stress of 347 MPa (50330 psi) during use, determine the minimum length of a surface crack that will lead to fracture. Assume a value of 0.94 for Y. mm
Chapter 9 1. What is the magnitude of the maximum stress that exists at the tip of an internal crack having a radius of curvature of 2.5 x 10-4 mm (10-5 in.) and a crack length of 2.5 x 10-2 mm (10-3 in.) when a tensile stress of 170 MPa (25,000 psi) is applied? 2. A large plate is fabricated from a steel alloy that has a plane strain fracture toughness of 55 MPa m (50 ksi in.). If the plate is...
1. A large plate is fabricated from a steel alloy that has a plane strain fracture toughness of 82.4 MPavm. If the plate is exposed to a tensile stress of 345 MPa during service use, determine the minimum length of a surface crack that will lead to fracture. Assume a value of 1.0 for Y. Maximum stress at tip of elliptically shaped crack Pt 2Ery, 1/2 critical stress required for crack propagation in a brittle material πα KIe YoeVra Fracture...
step by step solution please
3. The fatigue characteristics for a brass alloy are given as follows: Stress Amplitude (MPa) 170 Cycles to Failure 3.7 x 104 1.0 x 105 3.0 x 105 1 x 106 1 x 107 1 x 108 1 x 109 130 114 2 0 (a) Make an S-N plot (stress amplitude vs. logarithm cycles to failure) using these data. (b) Determine the fatigue strength at 4 x 106 cycles. (c) Determine the fatigue life for...
ection A uestion 1 Hook's Law, state which variables are involtved it its calculation and explain, equations or text, how to determine it (2 marks) A1. The with a square cross-section 1 cm. Determine the direct stress test specimen is being subjected to a tensile load of 3.0 kN, as shown in figure specimen is composed of Titanium, the cylinder is being subjected to. Show your resulit in MNIm s cm Figure A1 Tensile test specimen (3 marks) c) How...
A wood beam (1) is reinforced on its lower surface by a steel
plate (2) as shown in the figure. Dimensions of the cross section
are b 1 = 220 mm , d = 385 mm , b 2 = 190 mm , and t = 25 mm . The
elastic moduli of the wood and steel are E 1 = 12.5 GPa and E 2 =
200 GPa , respectively. The allowable bending stresses of the wood
and steel...
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