Why does the Ultimate tensile Strength (UTS) show a different value than when the test sample breaks? Explain why.
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- The % of error between a theoretical shear modulus of 65 GPa and an experimental modulus of rigidity of 60235 MPa is: Select one: O a. 0.0791 % O b. 7.33 % O c. 0.0668 % O d. 7.9 % Torrion test is annlied to study the properties of a material subjected to tensile force.Differentiate between the fatigue test and tensile test.Why hardness test needs to perform in engineering practice?
- The measured value of %El for a metal in a tensile test (Test 1) = 25%. The gauge length of the tensile sample was 50 mm. The same metal was tested in tension (Test 2) using a gauge length of 25 mm. The measured %El = 30%. Determine the AL after necking for Test 1. Show all workGiven your understanding of what initiates and controls failure in materials, which of the following will reduce the failure strength or lifetime of a test piece and why? a. (more than one answer is possible for this question. marks will only be awarded for the question if all the correct options are selected (i.e. 'all or nothing' marking scheme). b. LUS C. d. Increasing its volume, greater likelihood of critical defects Decreasing the loading frequency, the material will be at peak stress values for longer Decreasing the grain size, more grain boundaries to initiate failure Increasing the difference between the maximum and minimum stress values, as this affects the stress concentration factor Recent M Raising the temperature above the BDTT, more plastic deformation in the lattice will cause it to fail faster G5.3) A cold-worked carbon steel was tested in a tensile test and the results are shown in Table 1 below: Table 1. Tensile test results Original diameter 10,00 mm Final diameter 7,60 mm Original gauge length 102,00 mm Final gauge length 114,30 mm Load at upper yield 31,21 kN Maximum force 36,25 kN Load at fracture 28,65 kN Factor of safety 2 For Questions 5.3.1 to 5.3.8, calculate the following tensile test properties based on the information provided in Table 1 above: 5.3.1) Stress at upper yield. ANSWER TO QUESTION 5.3.1 5.3.2) Ultimate tensile stress. ANSWER TO QUESTION 5.3.2
- 9) Brinell hardness test is performed in the TENSION zone of Universal Testing Machine Select one: True FalseFor what purpose is A uniaxial tensile test performed?q1: Describe tensile test in detail considering the steps. . define stress , strain (equation and units) . elasticity modulus, elastic and plastic zones . toughness, resilience of matiral Demonstrate stress strain curve for your answer
- a What is the difference between vicker hardness test and brinell hardness test based on load ,indenter , accuracy ? b . what is the meaning of toughness in material science ? c . the toughness of material is affected by what ? d . what is the difference between tensile test and impact test?The results of a tensile test are: Diameter of the specimen Gauge length Load at limit of Proportionality Extension at the limit of Proportionality Maximum Load : 10mm :40 mm :80kN : 0.06mm. :100 kN Calculate ultimate tensile stress and young's modulus.Select three: Three commonly used tests to measure the hardness related properties of materials are: Rebound Fracture Indentation Scratch Charpy Yield