I. In a few words or in a single short sentence explain why it is easier to deform a piece of aluminum than a piece of iron? II. In a typical engineering stress-strain diagram, stress keeps on increasing after yield point due to strain hardening. In a few words or in a single short sentence explain what causes strain hardening? II. In a few words or in a single short sentence explain what kind of relationships represent thermally activated processes?. IV. Stress-Strain behavior of a hypothetical material is given below. Using 0.2 % offset yield strength method, determine (approximate) its yield strength and subsequently its modulus of elasticity. Draw (digital, manual, or copy and paste) the figure on your answer sheet and show the detail of your work. V. Determine the critical resolved shear stress on a BCC single crystal if a normal stress of 10 MPa along [100] direction causes slip system on (110) plan along [1-11], one-bar one-one, direction.

Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
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The image contains several questions and a stress-strain graph for educational purposes:

I. In a few words or in a single short sentence, explain why it is easier to deform a piece of aluminum than a piece of iron.

II. In a typical engineering stress-strain diagram, stress keeps on increasing after the yield point due to strain hardening. In a few words or in a single short sentence, explain what causes strain hardening.

III. In a few words or in a single short sentence, explain what kind of relationships represent thermally activated processes.

IV. The stress-strain behavior of a hypothetical material is given below. Using the 0.2% offset yield strength method, determine (approximately) its yield strength and subsequently its modulus of elasticity. Draw (digital, manual, or copy and paste) the figure on your answer sheet and show the detail of your work.

V. Determine the critical resolved shear stress on a BCC single crystal if a normal stress of 10 MPa along [100] direction causes a slip system on the (110) plane along [1-11], one-bar one-one, direction.

**Figure for Part D Explanation:**

- The graph is a typical stress-strain curve plotted with Stress (MPa) on the Y-axis and Strain on the X-axis.
- The curve starts at the origin (0,0) and rises initially steeply, indicating the elastic region.
- It then bends, showing the onset of plastic deformation as it approaches a linear region before leveling off, indicating strain hardening.

This figure is used to assess material properties such as yield strength and modulus of elasticity, which are crucial in determining how a material behaves under various loads.
Transcribed Image Text:The image contains several questions and a stress-strain graph for educational purposes: I. In a few words or in a single short sentence, explain why it is easier to deform a piece of aluminum than a piece of iron. II. In a typical engineering stress-strain diagram, stress keeps on increasing after the yield point due to strain hardening. In a few words or in a single short sentence, explain what causes strain hardening. III. In a few words or in a single short sentence, explain what kind of relationships represent thermally activated processes. IV. The stress-strain behavior of a hypothetical material is given below. Using the 0.2% offset yield strength method, determine (approximately) its yield strength and subsequently its modulus of elasticity. Draw (digital, manual, or copy and paste) the figure on your answer sheet and show the detail of your work. V. Determine the critical resolved shear stress on a BCC single crystal if a normal stress of 10 MPa along [100] direction causes a slip system on the (110) plane along [1-11], one-bar one-one, direction. **Figure for Part D Explanation:** - The graph is a typical stress-strain curve plotted with Stress (MPa) on the Y-axis and Strain on the X-axis. - The curve starts at the origin (0,0) and rises initially steeply, indicating the elastic region. - It then bends, showing the onset of plastic deformation as it approaches a linear region before leveling off, indicating strain hardening. This figure is used to assess material properties such as yield strength and modulus of elasticity, which are crucial in determining how a material behaves under various loads.
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