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Creep is defined as the deformation under constant stress over the period time at higher…

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creep is testing under fluctuating cyclic stresses Select one: True False

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

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Thermal Properties of Materials

In mechanical engineering, the thermal property is represented as the physical quantity that is relevant to the application of heat. The thermal properties are evaluated by variations in any specific material due to low heat or high heat. The quantities that influence the thermal property of the materials are mass, density, temperature, and many others.

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Part A and B circle final answers The next 2 question relate to the modified Goodman diagram with the following baseline data. A part is made from steel with the following properties: Ultimate tensile strength is 450 MPa Yields stength is 260 MPa Fully-corrected endurance limit is 180 MPa The part is subjected to a time-varying load with σmax = 150 MPa and σmin = 90 MPa . Part A The safety factor with respect to fatigue is?? Part B - the safety factor with respect to yielding is?
For the given fluctuating fatigue load,the values of stress amplitude and stress ratio are respectively???
70% + | 8 0 4. An application requires ultimate tensile strength and yield strength of a steel at 110 ksi and 91 ksi, respectively. A data table is attached in the back of the test. Answer the following 4 questions: 4.1. Can SAE 1040 steel be selected for this application? 4.2. If "no" is the answer in Part I, the following Part II, III, and IV can be ignored. If "yes" is the answer in Part I, which condition of SAE 1040 should be selected? 4.3. Why is that steel with the condition in part II selected? 4.4. Is the selected steel brittle or ductile? and Why? Page 4 of 6
QUESTION 1 Predict the fatigue strength (ksi) at N=1000 cycles for a fatigue test specimen of a steel whose tensile strength is 125 ksi
Q4: A Company requires a stainless steel that is tough enough for use in the Tropics (50 °C) as well as the Arctic (-50 °C). They peruse the data in Figure 1 below. At the designed use stress, the component can tolerate a surface defect of 0.080 in. at 50 °C. Manufacturing inspection equipment can only detect defects that are larger than 0.050 in. Will a fracture unsaąfe situation arise at -50 °C for the same loading, explain why? 180 180 200 1200 160 160- 160 1000 140 140 120 Yield strength B00 120 3120 100 100 600 80 80 400 60 Fracture toughness 40 200 20 20 Figure 1 01 150 -150 -100 -50 50 100 Testing temperature (°C) Fracture toughness (Hsi-in.12) 60 Fracture toughness (MPa-m) Yield strength (MPa) 우 Yield strength (ksi)