When selecting materials for mechanical applications, the value of modulus of resilience for a material shows how good the material is at absorbing mechanical energy without sustaining any permanent damage. Another important characteristic of a material is its ability to handle overloading before it fractures. The value of modulus of toughness provides such information. Look up the values of modulus of resilience and modulus of toughness for (a) titanium and (b) steel

When selecting materials for mechanical applications, the value of modulus of resilience for a material shows how good the material is at absorbing mechanical energy without sustaining any permanent damage. Another important characteristic of a material is its ability to handle overloading before it fractures. The value of modulus of toughness provides such information. Look up the values of modulus of resilience and modulus of toughness for (a) titanium and (b) steel

Materials Science And Engineering Properties

1st Edition

ISBN:9781111988609

Author:Charles Gilmore

Publisher:Charles Gilmore

Chapter8: Engineering Materials

Section: Chapter Questions

Problem 8.5P: The frame of a space shuttle type vehicle must have a high yield strength and high stillness, and...

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The frame of a space shuttle type vehicle must have a high yield strength and high stillness, and the most important design factor is weight. Of all the materials presented in this chapter, what material might be the most suitable for the frame of a space shuttle? Assume that there will be both tensile and compressive stresses. For a space shuttle, cost is not a limiting factor. (a) You can eliminate entire classes of materials from consideration with a brief statement about their unsuitability. (b) What material has the highest specific yield strength? Give the yield strength, specific gravity, specific yield strength, elastic modulus, and specific elastic modulus for this material. (c) What material has the highest specific elastic modulus? Give the yield strength, specific gravity, specific yield strength, elastic modulus, and specific elastic modulus for this material. (d) Compare the materials with the highest specific yield strength and highest specific elastic modulus for suitability in the space shuttle frame. (C) Discuss the suitability of the top-rated material for this design from the viewpoint of the ability to produce a frame.
The following idealized data was obtained from tensile testing of steel.It is required to determine the following:a. Yield strength, modulus of elasticity, ultimate tensilestrength, and rupture strength.b. Modulus of toughness.c. Modulus of resilience.
1.19 A brass alloy has a yield strength of 280 MPa, a tensile strength of 390 MPa, and an elastic modulus of 105 GPa. A cylindrical specimen of this alloy 12.7 mm in diameter and 250 mm long is stressed in tension and found to elongate 7.6 mm. On the basis of the information given, is it possible to compute the magnitude of the load that is necessary to produce this change in length? If so, calculate the load. If not, explain why.
Use the engineering stress strain diagram provided below to answer parts (A) to (H) below (the stress-strain diagram has already been drawn for you): stress strain diagram 400 350 0 300 0 250 0 200 0 150.0 100.0 50.0 O 05 0 1 0.15 strain A. Determine the tensile strength of this alloy. B. show the elastic, plastic and total strain on the diagram stress (Mpa)
(a) What is the effect of increasing the carbon content in steel on each of the each of the following items? 1. Yield strength 2. Modulus of elasticity 3. Ductility (b) Materials are generally classified into three categories based on the predominant types of bond. What are these three categories and what are the predominant types of bond in each category? For each category, provide two examples of common materials used by civil engineers.
In the figure below, a stainless steel wire is supporting a weight, W. The Yield Strength and Young’s Modulus for stainless steel (Grade 304) is 205 MPa and 190 GPa, respectively. What is the maximum weight, W, in kN that can be supported by the wire if the allowable deformation is 1.3 mm? What is the safety factor relative to the Yield Strength at this allowable deformation condition?
A 1-cm-diameter, 30-cm-long titanium bar has a yield strength of 345 MPa, a modulus of elasticity of 110.3 * 10^3 MPa, and Poisson's ratio of 0.30. Determine the length and diameter of the bar when 2224N load is applied.
A cylindrical rod with a diameter of 15.24 mm and a gauge length of 400 mm is subjected to a tensile load. If the rod is to experience neither plastic deformation nor an elongation of more than 0.45 mm when the applied load is 31000 N, which of the four metals or alloys listed below are possible candi- dates? Justify your choice(3). TABLE P1.12 Material E (GPa) Yield Strength (MPa) Tensile Strength (MPa) Steel alloy 1 Steel alloy 2 Titanium alloy Сopper 180 860 502 200 400 250 110 900 730 117 220 70
A piece of steel is said to have Young’s modulus of 29 × 106 psi. Based upon a yield strength of 36,250 psi, how much can one expect a 325 mm pipe of this material to compress if the pipe has an ID of 2.125 and an OD of 2.625?
Sketch the stress–strain behavior of steel, and identify different levels of strength. What is a typical value for yield strength of mild steel? What is theeffect of increasing the carbon content in steel on each of the each of thefollowing items?a. Yield strengthb. Modulus of elasticityc. Ductility
To stretch a 200 mm long tensile test specimen (a) of steel elastically by 0.08 mm. How many loads do I need to apply? (b) What is the maximum length of this sample without plastic deformation? How long can it be extended? (The modulus of elasticity of steel is 210 GPa, yield strength 580 MPa, tensile strength 920 MPa specified as.
Three materials X, Y, and Z are available for a certain usage. Any material selected must have a good weldability. Tensile strength, stiffness, stability and fatigue strength are required with fatigue strength considered being the most important and stiffness the least important of these factors. The three materials are rated as follows in these factors. Properties X Y Weldability Excellent Рoor Good Tensile strength G E Fair Stiffness Very Good G G Stability G E G Fatigue strength F G E Which material should be selected? Explain your choice.