There is a steel that has been rolled and you want to verify its mechanical properties, so two samples are cut, one in the direction of the rolling and the other perpendicular to it. In which case both samples have the same properties and in which case they are not the same.
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There is a steel that has been rolled and you want to verify its mechanical properties, so two samples are cut, one in the direction of the rolling and the other perpendicular to it. In which case both samples have the same properties and in which case they are not the same.
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- No 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.What is the linear variation in the shear strain?Question 4 Save Answer You do a series of tensile tests on plates of a magnesium alloy that have been subjected to prior cold rolling to true plastic strains of 0.1, 0.2 and 0.3. The resulting true stress-true strain curves are shown below (including a zoomed in version expanding on the small strain region). It is reasonable to approximate the the 0.2% offset yield strength of the magnesium as ✓ MPa for 0.2 and ✓ MPa for 0.3. Assuming the yield strength is ✓ MPa for 0.1 plastic strain, proportional to the square root of the prior true plastic strain results in a hardening coefficient of approximately k= MPa. Hence, we can predict that we need a prior plastic strain of approximately True Stress (MPa) True Stress (MPa) True Stress (MPa) 250 200 150 100 50 0 0.00 250 200 150 100 50 0 0.00 250 200 150 100 50 0 0.00 Ep = 0.1 0.01 Ep=0.2 0.01 Ep=0.3 0.01 0.02 True Strain 0.02 0.03 0.02 0.03 True Strain 0.03 0.04 0.04 0.04 True Stress (MPa) 0.05 0.000 0.001 True Stress (MPa) Ep=0.1 True…
- Give an example of the Absolute Maximum Shear Strain?Questions: 1. Two thick slabs of 300mm each, the first one is used in cold rolling where u=0.08 while the second is used in cold rolling where u-0.5. The mill roll diameter in each case is the same as 600mm. Determine the max draft (reduction) in both cases. Discuss the wide difference in results. = 2. A tensile specimen of the metal of 100 mm is length stretched to a length 157 mm during the rolling process. If the metal has a flow curve with parameters: K = 850 MPa and strain hardening exponent n = 0.30. Determine the average flow stress that the metal has been subjected to during the deformation.The problem was solved to verify the performance by doing the calculations in the image. Redo the same problem, but by changing the material to a cheaper one or one that will make it more efficient. Please include where you got the price of the material if you chose cheaper material or type of material if it will make it more efficient
- If material A is observed to have twice the modulus of rigidity but the same Poisson's ratio and yield shear stress than that of material B, then which of the following comparisons is always true? Select one: Material A can resist higher normal stresses than material B can before permanent normal deformations occur. O b For the same load that brings the materials to plastic behavior, material A will experience larger permanent shear deformations than material B. Material A can resist higher shear stresses than material B before permanent shear deformations occur. O d. Material B is has a lower ultimate stress than material A.The problem was solved to verify the performance by doing the calculations in the image. Redo the same problem, but by changing the material to a cheaper one or one that will make it more efficient. Please include where you got the price of the material if you chose cheaper material or type of material if it will make it more efficient. Please show the work more clear with full stepsAs Fast As you can Please mak sure the answer is correct 100% Please match the following to the appropriate areas or sublocations illustrated on the steel stress-strain curve shown below: (ultimate tensile stress- yield stress - repture stress) (4) The maximum stress point on the stress strain curve. (2) The point where the proportional limit ends and the moment the elastic limit of the specimen is reached, the specimen will return to its original state after the loading is removed. Typically occurs before the steel specimen starts to plastically yield. (5) The point at which the steel specimens has underwent necking and breaks. This typically occurs after the maximum stress is reached during the experiment.
- When the true strain equals 0.14 and the true stress equals 355 MPa, the tensile test specimen starts to neck. Find the strength coefficient and the strain-hardening exponent in the flow curve equation without knowing any more about the test.Question 4 You do a series of tensile tests on plates of a magnesium alloy that have been subjected to prior cold rolling to true plastic strains of 0.1, 0.2 and 0.3. The resulting true stress-true strain curves are shown below (including a zoomed in version expanding on the small strain region). It is reasonable to approximate the the 0.2% offset yield strength of the magnesium as ✓ MPa for 0.1 plastic strain, ✓ MPa for 0.2 and ✓ MPa for 0.3. Assuming the yield strength is proportional to the square root of the prior true plastic strain results in a hardening coefficient of approximately k= ✓ MPa. Hence, we can predict that we need a prior plastic strain of approximately ✓to obtain a hgth of 120 MPa True Stress (MPa) 250 200 100 85 95 50 105 115 125 135 145 300 350 0.12 0.14 150 0.16 0.18 155 165 175 200 250 0.1 True Stress (MPa) Ep = 0.1 Zoomed version of left plotwhy 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 .