Q2. A machine component experiences cyclic loading with a maximum stress of AMPa* and a minimum stress of B MPa (see individual data for values of A andB).(i) Calculate the mean stress Sm and the stress amplitude Sa(ii)An S-N curve for the material used in the component is described by thefollowing equation:S = 450N, -0.159Neglecting the influence of mean stress, calculate the number of cyclesto cause failure, Nf, given the stress amplitude calculated above (i.e.Q2(i)). You may assume that the S-N curve applies to the mean stresscalculated for the component's stress-cycle.

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Answered: Q2. A machine component experiences…

Mechanics of Materials (MindTap Course List)

9th Edition

ISBN:9781337093347

Author:Barry J. Goodno, James M. Gere

Publisher:Barry J. Goodno, James M. Gere

Chapter1: Tension, Compression, And Shear

Section: Chapter Questions

Problem 1.6.7P: A wine of length L = 4 ft and diameter d = 0.125 in. is stretched by tensile forces P = 600 lb. The...

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A wine 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 mathematically by =18,0001+30000.03(=ksi) in which is nondimensional and has units of kips per square inch (ksi). (a) Construct a stress-strain diagram for the material. (bj 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?
Solve the preceding problem if the diameter is 480 mm, the pressure is 20 MPa, the yield stress in tension is 975 MPa, the yield stress in shear is 460 MPa, the factor of safety is 2,75, the modulus of elasticity is 210 GPa, Poissorfs ratio is 0.28, and the normal strain must not exceed 1190 x 10" . For part (b), assume that the tank thickness is 8 mm and the measured normal strain is 990 x 10~ .
In the picture there is a sketch of a socket wrench. Assume the wrench is held at a fixed point “A”. The yield stress of the material is known to be 400 MPa. Answer the questions below Describe the stresses at point “A” and their causes and calculate the stresses. Determine the factor of safety against yield assuming the Tresca yield criteria. Determine the factor of safety against yield assuming the von Mises yield criteria using both principal stresses and “Cartesian” stresses. Do your values match or not, and is this expected? Explain. Do the calculated values make sense with the respect to the Tresca value? Explain, why or why not?
Please answer all 3 parts of the wuestion
Q3b. The stress-strain characteristic curves for materials A, B and C are shown below. Which one statement most accurately describes the relative toughness and ductility for materials A, B & C? Material A Material B Material C Strain Select one: a. Material A has low toughness, Material B has high ductility and Material C has low toughness. b. Material A has high toughness, Material B has low ductility and Material C has low toughness. c. Material A has low ductility, Material B has low toughness and Material C has low toughness. d. Material A has high ductility, Material B has low toughness and Material C has high toughness. Stress
Q1. (i) Initial strain Please enter your answers here Q1. (i) Your Answers: Please enter your supplied question data Q1. (ii) E0 B (hr1¹Pa-¹) n Fracture 0.003 4.60E-34 Mechanics of Materials 2 Tutorial 6 Q1. (ii) E General guidance on the Tutorial Portfolio assignment was provided at the beginning of Tutorial Exercise 1 and is available separately on-line on the module website. B 3.2 A Q2. σ (Pa) σo (Pa) 780,000,000 This tutorial exercise assesses fundamental understanding of the creep and stress relaxation response of metals subjected to either constant load or constant strain. It is designed to reinforce learning of principles set out in your current stage 2 lecture notes in "Creep Failure and Stress Relaxation" and to build on knowledge previously presented in the stage 1 module "Solids & Structures". C Q3. t (hr) For further information you may refer to Chapter 21 (Creep and Viscoelasticity) of Benham, Crawford, and Armstrong (1996), 2nd Ed. Q1. A typical graph of strain (e) versus…
The fluctuating stresses listed in the table are found at a critical location of a component made of steel with Se = 40 ksi, Sy = 80 ksi, Sut = 110 ksi and f= 0.87. These stresses are applied on the part within 10 s. What is the accumulative damage of this part? What is the life of the part in hours if this stress pattern continues to repeat for the remained of the part's life? Use Goodman criterion and Miner's rule in your solution. Loading order |Omin o max |Number of cycles -20 30 -10 50 1 3. -30 30 1
&0 0.005 B (hr-¹Pa-¹) 4:20 E-34 n 3.15 σo (Pa) 550,000,000
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Q2. Determine the safety factors for the bracket rod shown in Figure 2 based on both the distortion-energy theory and the maximum shear theory and compare them. Given: The material is 2024-T4 aluminum with a yield strength of 47 000 psi. The rod length /= 6 in. and arm a = 8 in. The rod outside diameter od 1.5 in., id = 1 in, h=2 in., t=0.5 in., Load F= 1000 lb. Assumptions: The load is static and the assembly is at room temperature. Consider shear due to transverse loading as well as other stresses. (Note: solve in SI units) wall tube Figure 2 arm
please wright by hand
Example 31: A thin cylinder 75 mm internal diameter, 250 mm long with walls 2.5 mm thick is subjected to an internal pressure of 7 MN/m Determine the change in internal diameter and the change in length, If in addition to the infernal pressure, the cylinder is subjected to a torque of 200 N.m find the magnitude and nafure of the stresses set up in the cylinder.E=200 GN/m², v=0.3. d-7s mm T-200 N-m

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