List three examples each of automobile components made up of steel and polymers.

An investigation of mechanical properties and microstructures of aluminium alloy 201.

Define a homogeneous material?

List and define the properties required for a material to be deformed.

Describe the material behavior of Steel

Specify a copper alloy that requires at least 50% elongation and at least 300 MPa tensile strength.

Define the term Modulus of Toughness?

The figure shown below (Fig. 2) is a schematic representation of a scissor jack in two different positions. The maximum load that this mechanism must withstand is 800 kg. 4 are proposed different materials to make the jack arms and spindle. The mechanical properties and some Physical characteristics of each material are shown in Table 1. a) Based on the properties of each material and the cross section of the arms and the screw, Propose what would be the most suitable material for its manufacture. The length of each arm is 150 mm. The stress on the arms and the spindle must not exceed the yield strength of the material selected for neither of the two analysis positions. b) Using the mechanical properties of the material you selected, calculate the change in dimension that the arms and the spindle of the jack were tested for the two analysis positions. The length of the spindle is 280 mm.

Handwritten allowed (must need explanation)

Prove that the Poisson's ratio of an isotropic, homogeneous material must be between -1 ≤ v≤0.5. (Hint: use the relationships between elastic constants and assume that all constants are positive). What does it mean for a material to have a Poisson's ratio of v = 0.5? How about v = -1? Give an example of materials (or metamaterials) that reach these values.