Match the following statements with the term that best describes each statement. hooks lawcreepimpact strengthproportional limitfatigueelastic nutes, 38 seconds.tus:The tendency of a solid material to move slowly or deform permanently under theal stresses below the yield strength of the material.The behavior of materials that deform when loaded but return to their original shape afterThe linear relationship between stress and strain in the elastic region below theThe phenomenon where cracks propagate under loads less than the yield stress due toThe material property determined using the Charpy or Izod test.The point at which the stress vs strain becomes non-linear in an elastic material.rcent elongation of a tensile sample, a ductile engineering material is defined by a value equal toand a brittle material is defined by a value less than 5%

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Answered: Match the following statements with the…

Match the following statements with the term that best describes each statement. hooks law creep impact strength proportional limit fatigue elastic

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

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The S-N curve which represents the fatigue strength, which is measured as a stress amplitude, as a function of number of stress cycles, can be approximated by a straight line in therange of 103cycles to 106cycles when plotted as log(S) versus log(N). Beyond 106cycles,the fatigue strength remains constant. The fatigue strength of a certain alloy at 103cyclesis given as 80 % of the ultimate tensile strength and its endurance limit is 50 % of theultimate tensile strength.(a) The alloy part fails in 15 000 cycles. Calculate the percent change (increase or decrease)of the maximum applied cyclic stress amplitude if the life of the part needs to beextended by 3.5 times. Is this considered under a high or low cycle fatigue failure?State any assumptions made. (12 marks)(b) If the applied cyclic stress amplitude remains unchanged when the life is extended by3.5 times, calculate the percent change (increase or decrease) of the ultimate tensilestrength of a new alloy required. (8 marks)(c) If the…
a . Sketch stress strain curve if the result shown in table represent the force and extension happened in steel, and show Mechanical properties that we get from tensile test on curve? (10p)Note : Lo=80 mm , Do=10 mm , use excel to plot the curve ExtensionLoad(mm) (N)0 0.900.83 4694.341.67 4831.412.50 4781.083.33 4918.834.17 4926.585.00 5257.075.83 5437.016.66 5575.888.33 5775.189.16 5847.5210.83 5965.4111.67 6010.5312.50 6042.5713.33 6072.2614.16 6092.9315.00 6113.2416.67 6140.3617.50 6146.3718.33 6148.1419.16 6149.1725.00 5940.2125.83 5675.3326.67 4725.52b. What is meant by modulus of rigidity? if it increases what does happen to material? (2p)
A high-impulse universal testing machine is being used to determine the Young's Modulus of a rectangular solid specimen (l = 20 cm, t = 1.5 cm, w = 2 cm). The machine produces 35,000 Ns that causes the impact force of compression resulted to a 1 mm deformation in the length of the specimen in 0.05 s. Determine the Young's modulus of the specimen expressed in MPa. Round off your answer to the nearest whole number
3. A steel tape is calibrated at 20°C. On a cold day when the temperature is -15°C,what will be the percent error in the tape?
Young Modulus of a material has characteristics of : (Choose TRUE or FALSE for each statement) Can be obtained by the gradient of stress versus strain graph. OTRUE OFALSE As a measurement for a material due to its resistance, subjected to the exerted forces. O TRUE O FALSE The two-dimensional plane of the material depends on Young Modulus. O TRUE OFALSE
Table Q4 belowindicates results on a tensile test of a mild steel specimen. 95 kN Proportional Limit load Original diameter Original ga uge length 30 mm 50 mm Yield Point Load 100 kN Extension at proportional limit 0.050 mm Maximum recorded load 160 kN Final length between gauge points 58.8 mm Final minimum diameter 17.9 mm Table Q4 Calculate the following: a. Modulus of Elasticity for the mild steel. b. The proportional limit stress. C. The ultimate tensile strength. d. The percentage elongation. e. The percentage reduction in area.
3. One way of quantifying the energy needed to create fracture in a material is with a Charpy test, shown to the right. A large pendulum (here m= 50 kg, ka = 1.75 m) is released from rest 1.25 m when 0= 0°. The pendulum hits a notched sample of standard size of the material to be tested at S. The pendulum swings up the other side, with its angular distance measured by a ratcheted scale. The system is designed to minimize frictional losses, so the difference in the energy at release and the maximum energy in the follow through is the energy absorbed in fracturing the sample. For the Charpy apparatus shown, what is the angular velocity and kinetic energy of the pendulum the instant before it hits the sample at S when 0=90°.
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1- Rankin's theory of failure is applicable for following type of materials (a) Brittle (b) ductile (c) elastic (d) plastic 2- Stress concentration is caused due to (a) Variation in properties of material from point to point in a member (b) Pitting at 'points or areas at which loads on a member are applied (c) Abrupt change of section (d) all of the above (e) none of the above 3- Yield point in fatigue loading as compared to static loading is (a) Same (b) higher (c) lower (d) depends on other factors (e) none of the above. 4- Transverse fillet welded joints are designed for (a) Tensile strength (b) compressive strength (c) Shear strength (d) bending strength (e) torsional strength. 5. The stress represented by cos (t) belongs to which category? a) Fluctuating Stresses b) Alternating Stresses c) Repeated Stresses d) Reversed Stresses 6. If the mean stress value for a sinusoidal stress function is zero, then this type of stress falls in which category? a) Fluctuating Stresses d) Reversed…
1- Rankin's theory of failure is applicable for following type of materials (a) Brittle (b) ductile (c) elastic (d) plastic 2- Stress concentration is caused due to (a) Variation in properties of material from point to point in a member (b) Pitting at 'points or areas at which loads on a member are applied (c) Abrupt change of section (d) all of the above (e) none of the above 3- Yield point in fatigue loading as compared to static loading is (a) Same (b) higher (c) lower (d) depends on other factors (e) none of the above. 4- Transverse fillet welded joints are designed for (a) Tensile strength (b) compressive strength (c) Shear strength (d) bending strength (e) torsional strength. 5. The stress represented by cos (t) belongs to which category? a) Fluctuating Stresses b) Alternating Stresses c) Repeated Stresses d) Reversed Stresses 6. If the mean stress value for a sinusoidal stress function is zero, then this type of stress falls in which category? c) Repeated Stresses b) Alternating…
Project 3: Table 4 shows the fatigue data of a ductile cast iron to be used for an automobile axle that rotates at an average rotational speed of 750 revolutions per minute: Tuble 4: Fuligue dula of u duclile cust iron Stress Amplitude (МPa) Cycles to Failure 248 1 X 105 236 ЗX 105 224 1X 106 ЗX 106 1 X 107 3 X 107 1 X 108 3 X 108 213 201 193 193 193 a) Make an S-N plot (stress amplitude versus logarithm cycles to failure). b) What is the fatigue limit for this alloy? c) Determine the fatigue lifetimes at stress amplitudes of 230 MPa and 175 MPa? d) Discuss your results.
Q.3. A cylindrical specimen of cold-worked Brass has a tensile strength of 500 MPa. If the specimen remained cylindrical during deformation and its original radius was 10.6 mm, determine its radius after deformation. The dependence of tensile strength on percent cold work is shown in the following Figure. 140 900 1040 Steel 120 800 700 100 600 Brass -80 500 -60 400 Copper 300 -40 200 10 20 30 40 50 60 70 Percent cold work Tensile strength (MPa)