Calculate the percent cold reduction when platinum wire is cold-drawn from a diameter of 5.53 mm to a diameter of 3.35 mm.
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Calculate the percent cold reduction when platinum wire is cold-drawn from a diameter of 5.53 mm to a diameter of 3.35 mm.
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- Calculate the percent cold reduction when ansteel wire is cold drawn from a diameter of 6 mm to a diameter of 3 mm.Don't Copy . 4. Calculate the percent cold reduction when an Al wire is cold drawn from a diameter of 5 mm to a diameter of 2 mm.why use yield strength not tensile strength? You are drawing wire which you want the wire to elongate pernamently, and not return back to original shape .
- Find the toughness (or energy to cause fracture) for a metal that experiences both elastic and plastic deformation. Assume Equation 6.5 for elastic deformation, that the modulus of elasticity is 172 GPa (25 × 106 psi), and that elastic deformation terminates at a strain of 0.008. For plastic deformation, assume that the relationship between stress and strain is described by Equation 6.19, in which the values for K and n are 6900 MPa (1 × 106 psi) and 0.25, respectively. Furthermore, plastic deformation occurs between strain values of 0.008 and 0.61, at which point fracture occurs. J/m³No wrong answer please , i could downvote The piece of suture is tested for its stress relaxation properties after cutting 3 cm long sample with a diameter of 1mm. The initial force recorded after stretching 0.1 cm between grips was 5 Newtons. Assume the suture material behave as if it has one relaxation time. The gage length was 1 cm. a. Calculate the initial stress. b. Calculate the initial strain. c. Calculate the modulus of elasticity of the suture if the initial stretching can be considered as linear and elastic. d. Calculate the relaxation time if the force recorded after 10 hours is 4 Newtons.b) A metal wire is cold drawn from a radius of 5.75 mm to a radius of 3.25 mm. Compute the percent of the cold reduction in this process. (Ans: 68.05% c) A certain metal has a modulus of elasticity of 115 GPa, and its plastic deformation begins at a stress of 275 MPa. Calculate the maximum elongation to which it can be stretched without plastic deformation, if the metal has a length of 120 mm.
- 13.13 Tungsten is being used at half its melting point (Tm 3,400 °C) and a stress level of 160 MPa. An engineer suggests increasing the grain size by a factor of 4 as an effective means of reducing the creep rate. (a) Do you agree with the engineer? Why? What if the stress level were equal to 1.6 MPa? (b) What is the predicted increase in length of the specimen after 10,000 hours if the initial length is 10 cm? (Hint: Use a Weertman--Ashby map.) 1) Where in the book/slides is this covered? = page # or slide session/number 2) What equations and concepts apply here? Normalized tensile stress, o/G 10-² 10-4 10-6 10-8 0 Tungsten d = 10um, p = 4x 1010/cm² Theoretical strength Dislocation glide Coble creep 0.2 10-10 0.4 Dislocation creep /s 10-6 0.6 0.8 Homologous temperature, T/TM 10-2 10-4 10-6 Nabarro creep ≈ 1.0 ၆ SS Dislocation creep mechanism Dislocation glide climb, climb controlled Dislocation glide climb, glide controlled Dissolution of dislocation loops Dislocation climb without…Please solveIllustrate and briefly describe the typical creep curve for a metal.
- List 3 of the design methods that can be applied to avoid the occurrence of fatigueA wing component on an aircraft is fabricated from an aluminum alloy that has a plane strain fracture toughness of 28 . It has been determined that fracture results at a stress of 106 when the maximum internal crack length is 9.2 . For this same component and alloy, compute the stress level at which fracture will occur for a critical internal crack length of 6.6 .Using the tensile test simulation tool, a. generate the stress-strain curve for aluminum b. Indicate the following points in the stress-strain curve for aluminum and give the corresponding values: limit of proportionality elastic limit 0.2% offset yield stress (include the graph illustrating how this was determined) ultimate stress fracture stress c. Calculate modulus of elasticity. d. compare aluminum with nylon (include the related graph) and answer the following: Which has higher tensile strength? Provide the necessary values to support the answer. Which is stiffer? Support your answer with calculations.