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1.Divide the cards up equally among the group 2.Take it in turns to read out ONE property. The highest value wins the other cards. 3.Answer ALL questions at the bottom of each card

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Density 7,135 kgm -3 Malleability6 Hardness2.5Ductility5 Young modulus 96 GPaFlexibility2 Strength 200x10 6 Pa Toughness8 Density 8,940 kgm -3 Malleability7 Hardness3Ductility9 Young modulus 120 GPa Flexibility3 Strength 220x10 6 Pa Toughness6 Density 1,950 kgm -3 Malleability4 Hardness2Ductility0 Young modulus 181x10 9 Nm -2 Flexibility2 Strength 4300 x10 6 Pa Toughness9 Density 11,340 kgm -3 Malleability9 Hardness1.5Ductility2 Young modulus 16x10 9 Nm -2 Flexibility4 Strength 100 x10 6 Pa Toughness4 1. QUESTION: What is the definition of a brittle material? 2. QUESTION: How is the stiffness of a material calculated? 3. QUESTION: How is stored elastic energy calculated from a graph of Force applied (N) over extension of a material (m)? 4. QUESTION: What is hysteresis? How would this appear in a graph? Zinc Copper Carbon Fibre Lead

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Density 8000 kgm -3 Malleability6 Hardness4.5Ductility7 Young modulus 110 GPa Flexibility2 Strength 2000 x10 6 Pa Toughness8 Density1 kgm -3 Malleability0 Hardness0Ductility0 Young modulus 1 MPaFlexibility0 Strength 0.4x10 6 Pa Toughness1 Density4,500kgm -3 Malleabilit y 3 Hardness6Ductility7 Young modulus 310x10 9 Nm -2 Flexibility2 Strength10.4PGaToughness9 Density 7,800 kgm -3 Malleability6 Hardness4Ductility5 Young modulus 210x10 9 Pa Flexibility3 Strength 3x10 6 Pa Toughness7 5. QUESTION: Explain why the units of the Young Modulus can be either Nm -2 or Pa. 6. QUESTION: Why might a material be described as tough? 7. Task: Draw a stress strain graph for titanium. 8. Question: The compressive strength of marble is 112MPa. If a marble column holding up a roof of a temple is a cylinder supporting 1.43x10 7 N, what is it’s minimum diameter? Stainless Steel Aerogel Titanium Iron

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Density 1,100 kgm -3 Malleability10 Hardness2Ductility0 Young modulus 0.01x10 9 Nm -2 Flexibility7 Strength 15x10 6 Pa Toughness7 Density 2.7x10 3 kgm -3 Malleability0 Hardness1.2Ductility0 Young modulus 9.2Nm -2 Flexibility2 Strength 1x10 6 Pa Toughness2 Density 3.5x10 3 kgm -3 Malleabilit y 0 Hardness10Ductility0 Young modulus 1220x10 9 Nm -2 Flexibility0 Strength 1600x10 6 Pa Toughness10 Density10 kgm -3 Malleabilit y 2 Hardness10Ductility0 Young modulus 1000 GPa Flexibility1 Strength130 GPaToughness10 9. QUESTION: How is Young’s Modulus calculated? 10. TASK: Draw a stress-strain graph and plot two lines of different stiffness 11. QUESTION: Why is glass said to be brittle? 12. QUESTION: Name 3 malleable materials and state the definition of malleable. Graphene Diamond Rubber Graphite

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Density 510 kgm -3 Malleability2 Hardness2.5Ductility0 Young modulus 9 GPaFlexibility4 Strength 40X10 6 Pa Toughness5 Density 2.8x10 3 kgm -3 Malleability1 Hardness5.5Ductility0 Young modulus 80x10 9 Nm -2 Flexibility2 Strength 33x10 6 Pa Toughness8 Density 8520 kgm -3 Malleability6 Hardness3Ductility3 Young modulus 100x10 9 Nm -2 Flexibility2 Strength 550x10 6 Pa Toughness8.5 Density 2000 kgm -3 Malleability3 Hardness3Ductility0 Young modulus 14 x10 9 Nm -2 Flexibility4 Strength 130x10 6 Pa Toughness8 13. QUESTION: What are the units of tensile strain? 14. Task: Draw a stress-strain graph for glass 15. QUESTION: What is necking and when does it occur in material tests? 16. QUESTION: How is compressive stress calculated and what are the units? Pine wood Glass Brass Bone

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Density 1050 kgm -3 Malleability8 Hardness1Ductility0 Young modulus 7,500 Nm -2 Flexibility8 Strength20 MPaToughness1 Skin Density 1120 kgm -3 Malleability9 Hardness1Ductility1 Young modulus 2 GNm - 2 Flexibility8 Strength 580 x10 6 Pa Toughness9 Density 75kgm - 3 Malleability2 Hardness0Ductility0 Young modulus 3.5x10 9 Nm -2 Flexibility5 Strength50 MPaToughness1 Density 3970 kgm -3 Malleability0 Hardness7Ductility0 Young modulus 435x10 9 Nm -2 Flexibility0 Strength1.9 GPaToughness9 Sapphire 17. QUESTION: Define shear stress and give an example of it. 18. QUESTION: Is a material that is brittle also weak? 19. QUESTION: What can be said to be the opposite of brittleness? 20. QUESTION: ________ materials show resistance to plastic deformation Polystyrene Nylon

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Density 2,400 kgm -3 Malleability0 Hardness5Ductility0 Young modulus 85 GPaFlexibility1 Strength3 MPaToughness7 Density 2,700 kgm -3 Malleability6 Hardness3Ductility3 Young modulus 69 GNm -2 Flexibility7 Strength 50x10 6 Pa Toughness7 Density 1,300 kgm -3 Malleability8 Hardness0Ductility0 Young modulus 300 MPa Flexibility10 Strength1 GPaToughness9 Density0.07 kgm -3 Malleability7 Hardness0Ductility0 Young modulus Nm -2 Flexibility9 Strength 380x10 6 Pa Toughness8 21. QUESTION: What’s the definition of compressive strength? 22. QUESTION: What’s the definition of compressive strain? 23. QUESTION: Are all malleable materials tough? Explain. 24. QUESTION: Give the material properties necessary for a) Aeroplane wings b) Electrical wiring and c) Building construction Spider silk Human Hair Concrete Aluminium

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QUESTIONS 1.QUESTION: What is the definition of a brittle material? 2.QUESTION: How is the stiffness of a material calculated? 3.QUESTION: How is stored elastic energy calculated from a graph of Force applied (N) over extension of a material (m)? 4.QUESTION: What is hysteresis? How would this appear in a graph? 5.QUESTION: Explain why the units of the Young Modulus can be either Nm -2 or Pa. 6.QUESTION: Why might a material be described as tough? 7.Task: Draw a stress strain graph for titanium. 8.Question: The compressive strength of marble is 112MPa. If a marble column holding up a roof of a temple is a cylinder supporting 1.43x10 7 N, what is it’s minimum diameter? 9.QUESTION: How is Young’s Modulus calculated? 10.TASK: Draw a stress-strain graph and plot two lines of different stiffness 11.QUESTION: Why is glass said to be brittle? 12.QUESTION: Name 3 malleable materials and state the definition of malleable. 13.QUESTION: What are the units of tensile strain? 14.Task: Draw a stress-strain graph for glass 15.QUESTION: What is necking and when does it occur in material tests? 16.QUESTION: How is compressive stress calculated and what are the units? 17.QUESTION: Define shear stress and give an example of it. 18.QUESTION: Is a material that is brittle also weak? 19.QUESTION: What can be said to be the opposite of brittleness? 20.QUESTION: ________ materials show resistance to plastic deformation 21.QUESTION: What’s the definition of compressive strength? 22.QUESTION: What’s the definition of compressive strain? 23.QUESTION: Are all malleable materials tough? Explain. 24.QUESTION: Give the material properties necessary for a) Aeroplane wings b) Electrical wiring and c) Building construction

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ANSWERS 1.QUESTION: A lot of stress for little strain. Shatters upon larger applied forces? 2.QUESTION: F = kx, where k is the stiffness 3.QUESTION: Area under graph = Nm = Joules 4.QUESTION: What is hysteresis? How would this appear in a graph? 5.QUESTION: Explain why the units of the Young Modulus can be either Nm -2 or Pa. 6.QUESTION: Why might a material be described as tough? 7.Task: Draw a stress strain graph for titanium. 8.Question: The compressive strength of marble is 112MPa. If a marble column holding up a roof of a temple is a cylinder supporting 1.43x10 7 N, what is it’s minimum diameter? – 0.4m 9.QUESTION: How is Young’s Modulus calculated? 10.TASK: Draw a stress-strain graph and plot two lines of different stiffness 11.QUESTION: Why is glass said to be brittle? 12.QUESTION: Name 3 malleable materials and state the definition of malleable. 13.QUESTION: What are the units of tensile strain? 14.Task: Draw a stress-strain graph for glass 15.QUESTION: What is necking and when does it occur in material tests? 16.QUESTION: How is compressive stress calculated and what are the units? 17.QUESTION: Define shear stress and give an example of it. 18.QUESTION: Is a material that is brittle also weak? 19.QUESTION: What can be said to be the opposite of brittleness? 20.QUESTION: ________ materials show resistance to plastic deformation 21.QUESTION: What’s the definition of compressive strength? 22.QUESTION: What’s the definition of compressive strain? 23.QUESTION: Are all malleable materials tough? Explain. 24.QUESTION: Give the material properties necessary for a) Aeroplane wings b) Electrical wiring and c) Building construction

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PROPERTIES OF MATERIALS ENF 150 Chapter 10: Properties of Materials.

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