Given: the steel has a strength coefficient of 530 MPa, a strain hardening coefficient of 0.26,...
Given: the steel has a strength coefficient of 530 MPa, a strain hardening coefficient of 0.26, elastic modulus 200 GPa. The drawing process has a friction coefficient of 0.15, a die angle (2α =12 deg), and no redundant work.
(a) What is the maximum reduction that can be achieved in a single pass?
(b) Find the force needed to draw the wire through a second die that also provides 30% reduction (also with friction coefficient of 0.15, 2α =12 deg), and no redundant work.
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Given: the steel has a strength coefficient of 530 MPa, a strain
hardening coefficient of 0.26,...
Question 1 SAE 1030 has a 923.894 MPa flow curve strength coefficient and 0.326 strain-hardening exponent....
Question 1 SAE 1030 has a 923.894 MPa flow curve strength coefficient and 0.326 strain-hardening exponent. A tensile test specimen with 106.516 mm gage length is stretched to 449.297 mm. The flow stress when stretched is __ MPa.
A rod is drawn from a diameter of 43.0 mm to a diameter of 21.1 mm...
A rod is drawn from a diameter of 43.0 mm to a diameter of 21.1 mm in a draw die of 19.2°. The coefficient of friction is 0.120. Take the strength coefficient (K) as 321 MPa and the strain- hardening exponent as 0.258. a) Expected answer: 14238541504 Determine the true strain. b) Expected answer: 280 MPa Determine the average flow stress (of) c) Determine the ideal drawing force when friction is negligible. Use the ideal, no friction drawing stress formula....
5. A spool of Cu wire has a starting diam. Of 2.5 mm. It is drawn...
5. A spool of Cu wire has a starting diam. Of 2.5 mm. It is drawn through a die with an opening of 2.1 mm. Coefficient of friction at the work-die interface is 0.08. The pure Cu has a strength coefficient of 300 MPa & a strain hardening exponent of 0.5. The operation is done at room temperature. Determine: (A) area reduction, (B) draw stress & C) draw force required for the operation. Assume die angle to be 100.
Rod ABC is made of a steel for which the yield strength is oy= 450 MPa...
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
3. You are tasked with strengthening a 1040 steel rod via strain hardening. The component's application...
3. You are tasked with strengthening a 1040 steel rod via strain hardening. The component's application dictates a minimum of a 700 MPa yield strength while also maintaining as much ductility as possible. a. What percent cold working would you recommend? What are the associated yield strength and %EL? b. Given a starting diameter of 30mm, what should your diameter be after the prescribed cold working? 1040 Steel SEL Yield streng Mal Duct 400 Cooper 1040 Steel 2001 20 Copper...
235 Find the off-axis shear strength and mode of failure of a 60 boron/ epoxy lamina. Use the pro...
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Q-1. You are testing a circular beam of two metals, 1045 steel and 2014-T6 aluminum, in a rotating-cantilever beam fatigue test. If you need to choose one of these metals so that you can essentially design a part made of that metal, and subject the part to a repetitive stress-amplitude without ever failing due to fatigue, which one would you choose. (See the attached figure) Q-2. What is the fatigue strength for the 1045 steel alloy, if you expect to...
Question 1 SAE 1030 has a 923.894 MPa flow curve strength coefficient and 0.326 strain-hardening exponent. A tensile test specimen with 106.516 mm gage length is stretched to 449.297 mm. The flow stress when stretched is __ MPa.
A rod is drawn from a diameter of 43.0 mm to a diameter of 21.1 mm in a draw die of 19.2°. The coefficient of friction is 0.120. Take the strength coefficient (K) as 321 MPa and the strain- hardening exponent as 0.258. a) Expected answer: 14238541504 Determine the true strain. b) Expected answer: 280 MPa Determine the average flow stress (of) c) Determine the ideal drawing force when friction is negligible. Use the ideal, no friction drawing stress formula....
5. A spool of Cu wire has a starting diam. Of 2.5 mm. It is drawn through a die with an opening of 2.1 mm. Coefficient of friction at the work-die interface is 0.08. The pure Cu has a strength coefficient of 300 MPa & a strain hardening exponent of 0.5. The operation is done at room temperature. Determine: (A) area reduction, (B) draw stress & C) draw force required for the operation. Assume die angle to be 100.
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
3. You are tasked with strengthening a 1040 steel rod via strain hardening. The component's application dictates a minimum of a 700 MPa yield strength while also maintaining as much ductility as possible. a. What percent cold working would you recommend? What are the associated yield strength and %EL? b. Given a starting diameter of 30mm, what should your diameter be after the prescribed cold working? 1040 Steel SEL Yield streng Mal Duct 400 Cooper 1040 Steel 2001 20 Copper...
235 Find the off-axis shear strength and mode of failure of a 60 boron/ epoxy lamina. Use the properties of a unidirectional boron/epoxy lamina from Table 2.1. Apply the maximum stress failure, maximum strain, Tsai-Hill, and Tsai-Wu failure theories. TABLE 2.1 Tvpical Mechanical Properties of a Unidirectional Lamina (SI System of Units) Glass Boron/ Graphite/ Property SymbolUnits epoxy epoxy epoxy Fiber volume fraction Longitudinal elastic modulus Transverse elastic modulus Major Poisson's ratio Shear modulus Ultimate longitudinal tensile strength Ultimate longitudinal...
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