A high strength steel has a yield strength of 150 MPa and K_IC of 99 MPa...
(2) Maraging steel (300 grade) has a yield strength of 2100 MPa and a plane-strain fracture toughness of 66 MPa-m1. This material is to be used for a landing gear and the maximum design stress is 70% of yield strength. If flaws must be 1.0 mm long to be detectable, is this a reasonable operating stress? Assume edge cracks and Y-1.12
1. AA 6061, a high-strength aluminum alloy, has a 0.2% offset yield strength of 37,500-psi and a plane strain fracture toughness (Kic) 26,400-psi (inch) At a service stress equivalent to 80% of the yield strength, will this structure fracture if it contains an edge crack of length 2.24-inches. Assume that the geometric factor, f, is 1.12. 2. A steel alloy, which has a plane strain fracture toughness (Kle) of 49-MPa(m) is exposed to a service stress of 1010-MPa. Is fracture...
1. A ductile hot rolled steel bar has minimum yield strength of 360 MPa. Using the distortion-energy and maximum-shear-stress theories, determine the factors of safety for the following plane stress states: (20 points) (a) Ox = 200 MPa, y = 120 MPa (b) x = 180 MPa, Txy = 150 MPa (c) Txy = 100 MPa
A brass alloy is known to have a yield strength of 275 MPa (40,000 psi), a tensile strength of 380 MPa (55,000 psi), and an elastic modulus of 103 GPa (15.0×106 psi). A cylindrical specimen of this alloy 9.0 mm (0.35 in.) in diameter and 245 mm (9.65 in.) long is stressed in tension and found to elongate 9.0 mm (0.35 in.). A) What is the yield strain? B) What is the test strain?
[20 pts] A cable is made of 1040 steel which has 400 MPa yield strength and 500 MPa tensile strength. Calculate the minimum diameter required for such cable that carries a 250 kg elevator with 6 people in it without any permanent deformation to the cable. Assume a design/safety factor of 2.5. Assume the average weight of a single person as 80 kg. Gravitational acceleration: 9.81 m/s2 Lutfen birini seçin: O a. 3.38 mm O b. 3.77 mm O C....
Problem 6: Link 2, shown in the figure, is 25 mm wide, has 12-mm diameter bearings at the ends, and is cut from low-carbon steel bar stock having a minimum yield strength of 165 MPa. The end- condition constants are C-1 and C-1.2 for buckling in and out of the plane of the drawing, respectively. a. Using a design factor na 4, find a suitable thickness for the link. b. Are the bearing stresses at O and B of any...
Rod ABC is made of a steel for which the yield strength is oy= 450 MPa and the modulus of elasticity is E-200 GPa. Knowing that a strain energy of 11.2 J must be acquired by the rod as the axial load P is applied, determine the factor of safety of the rod with respect to permanent deformation when a -0.3 m. 18-mm diameter 12-mm diameter The factor of safety of the rod with respect to permanent deformation is
For a certain steel alloy, the yield strength is 560 MPa and the Young’s modulus is 200 GPa. What is the maximum load that may be applied to a specimen with a cross sectional area of without plastic deformation?
A composite rod is made up of typical structural steel (on the inside) and high strength steel (on the outside). Both steels (in fact all steels) have the same elastic shear modulus G- 80 GPa. The normal steel (inside) has a shear yield stress of 240 MPa. The high strength steel (outside) has a shear yield stress of 480 MPa. The rod is torqued so that the perimeter reaches a shear strain of 0.006. (a) Draw the strain diagram. (b...
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A ductile hot rolled steel bar has minimum yield strength of 360 MPa. Using the distortion-energy and maximum-shear-stress theories, determine the factors of safety for the following plane stress states: (20 points) (a) 0x = 200 MPa, y = 120 MPa (b) x = 180 MPa, Txy = 150 MPa (c) Txy = 100 MPa