Which sketch correctly shows the safe region for the Distortion Energy Failure Theory? (a) (b) (c) (d) (e) O O O OO
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Q: EXPLAIN THIS IMAGE
A: This question is based on the concept of Stress-Strain Curve.
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- In the Haigh diagram depicted in figure, point A represents the fatigue stress in a standard screw. Suppose the same screw is cold I rolled and then subjected to thes same fatigue l We A moves: expect point C A B O in D O in B O in C 246595 03mchd 3246598 03mehade dreamstime 10 010704650s 03mchu 24 5036 5.03men 2-699643mchado21 O 070 6246585 03cnoco 246595 03ohn=0,10 F Strain Stress n=019 9) Give an example of: i) a truly elastic material:..... ...ii) a material which is not viscoelastic:.... 10) If you require fatigue resistance for an application, among all manufacturing methods (machining, forging rolling casting deen drawing hich wath4) Express very briefly why the first region (Primary Creep) in Strain-Time creep diagram can be a design limitation (for what type of applications in general? Please DO NOT write aircraft parts!).: 5) For what type pf applications secondary creep range in Strain-Time creep diagram can be considered as design range?:
- Two forces are applied to a flywheel 50 cm in diameter. Each force is 500 N. The shaft is fixed to the wall using three grade 5 steel bolts. The distance between the bolts and the axis of rotation is 10 cm. (a) What moment of resistance must develop the three bolts together Answer: 250 Nm (b) What is the resistance force F of each bolt? Answer: 833.3 N (c) What is the diameter of the bolts if their factor of safety is 10? Answer: 4.14mmIn our previous topic regarding strain, repeat the problem on the strain using thefollowing parameters:F = 150000 +/- 150 lbfSide length = 1.2 +/- 0.025 inModulus of Elasticity = 25000 +/- 11.5 ksiDetermine the relative error. Is it above or below the accepted 5% error?1.6-7 A wire of length L = 4 ft and diameter d=0.125 in. is stretched by tensile forces P = 600 lb. The wire is made of a copper alloy having a stress- strain relationship that may be described mathemat- ically by %3| 18,000ɛ 0 < 8< 0.03 (ơ = ksi) = 1+ 300ɛ in which e is nondimensional and o has units of kips per square inch (ksi). (a) Construct a stress-strain diagram for the material. (b) Determine the elongation of the wire due to the forces P. (c) If the forces are removed, what is the permanent set of the bar? (d) If the forces are applied again, what is the proportional limit?
- Problem 2. Derive the following governing equations circular plate theory in detail and specialize them for the case of axisymmetric bending. = -D (v2w) and Qo = -D ar r ae D 1 a2aw 1 aw 1 dw r ar %3D ar2 r or zdevzee zd D5. A platform is suspended by two parallel rods, as shown in the sketch, with each rod being 1.28 cm in diameter. Rod A is manufactured from 4340 steel (Q+T 650 °C) (E= 210 MPa, o.2 = 855 MPa) ; rod B is made from 7075-T6 aluminium alloy (E= 70 GPa, oo.2 = 505 MPa). a) Develop an equation giving the realtionship between the applied force and the elastic strain in the rods up to the point of yielding. Assume full elastic behaviour up to the yield strength given above and that the loading is such that the elastic strain in each rod will be the same.Table B2: Stress-strain data for uniaxial compression test on Sample Normal stress Uniaxial strain (%) Lateral strain (%) (MPa) 0.0 0.0000 0.0000 5.0 0.0319 -0.0150 10.0 0.0720 -0.0275 15.0 0.1025 -0.0425 20.0 0.1450 -0.0600 25.0 0.1755 -0.0725 30.0 0.2150 -0.0875 35.0 0.2455 -0.1025 41.0 0.2815 -0.1125 46.0 0.3125 -0.1209 52.0 0.3515 -0.1285 58.0 0.4000 -0.1325 (f) Based on the plotted curve, calculate the average/tangent Young's modulus and Poisson's ratio for this sample, at 50 % UCS?
- And **The modulus of elasticity** (MPa) I need a clear step by step answer please :)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…