MTS300 - Materials Science

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Last revision date Jul 31, 2018 9:20:38 AM
Last review date Jul 31, 2018 9:20:49 AM

Subject Title
Materials Science

Subject Description
This course first provides the student with an introduction to the basic concepts of the subject Strength of Materials. Topics covered include stress and strain, elastic deformation of axially-loaded members, stress concentration factors, elastic deformation of circular rods under torsion, stresses in thin-walled pressure vessels, and metal fatigue. The students then learn about the physical and chemical properties, and the methods of heat treating, metals and alloys of importance in the aviation industry. The course concludes with discussions of composite materials and smart structures.

Credit Status
One Credit

Learning Outcomes
Upon successful completion of this subject the student will be able to:

1. Define the terms average normal stress, average shearing stress and bearing stress.

2. Calculate the average normal stress in a two-force member and the average shearing stress in a connecting bolt, pin etc. Students will also be able to calculate the average normal and shear stresses acting on an arbitrary plane through a two-force member.

3. Define ultimate stress and factor of safety and use these concepts to calculate the maximum allowable force(s) that can act on a given member of a frame, truss, etc.

4. Define the terms normal strain, shear strain, modulus of elasticity, shear modulus and Poisson's ratio.

5. Calculate the elastic deformation of homogeneous rods, beams etc. under axial loading and solve a variety of statically indeterminate problems.

6. Sketch the stress-strain diagrams of a variety of ferrous and non-ferrous metals and alloys and indicate on the sketches quantities such as the proportionality limit, elastic limit, yield stress, etc. where applicable.

7. Describe the significance of stress concentration, define the term stress concentration factor and use stress concentration factor plots to determine these factors for holes in plates, fillets in rectangular plates, etc.

8. Calculate the shear stress at a given radius in a solid or hollow circular shaft acted on by a system of couples, or alternatively, calculate the torque required to produce a given shear stress at a given radius in a shaft. The student will also be able to perform such calculations for composite circular shafts.

9. Use the formula relating angle of twist and applied torque for circular shafts undergoing elastic deformation to solve problems involving the twisting of shafts.

10. Write down expressions for the shear force and bending moment at an arbitrary point along a beam which is transversely loaded by concentrated forces and/or distributed forces, and sketch the shear force and bending moment diagrams for the beam. Students will also be able to find the point of maximum shear stress and the point of maximum bending stress.

11. Calculate the axial stress and hoop stress at a given point in thin-walled pressure vessels.

12. Discuss the characteristics of fatigue failure, the factors which can cause it and methods used to prevent this mode of failure.

13. Define terms relating to fatigue such as stress ratio, endurance limit etc. and use S-N diagrams to determine the endurance limits of notched and unnotched samples of various metal alloys.

14. Describe the composition and properties of low-, medium- and high-carbon steels and the common steel alloys. Students will also be able to describe the various methods of heat treating steels and the effects the heat treatments have on the properties of the steels.

15. Describe the physical properties, chemical properties, compositions and, where applicable, the methods of heat treatment of those non-ferrous metals and their alloys which are used extensively in the aviation industry.

16. Describe the properties, compositions and applications of the different types of composite materials used in the aviation industry and discuss the advantages and disadvantages of these materials with respect to conventional metal alloys.

17. Define smart structures and discuss possible applications of such structures in the aviation industry.

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