9.2Q) Material Properties Quiz

Match the following

• Poisson's Ratio

• A type of modulus defined by the ratio of pressure to volumetric compression (GPa) or ratio of the infinitesimal pressure increase to the resulting relative decrease of the volume

• Bulk Modulus

• Ratio of lateral strain to axial strain (no units)

• Shear Modulus

• A type of modulus defined as the ratio of linear stress to linear strain (MPa) (influences the stiffness and flexibility of an object)

• Elastic Modulus

• a measure of the stiffness of a material; the higher the elastic modulus the stiffer the material.
  Types include Young's, bulk, and shear moduli.

• Young's Modulus

• A type of modulus defined as the ratio of shear stress to shear strain (MPa)

Match the following

• hardness

• A material property defined as the maximum stress a material can withstand under repeated loading (MPa)

• Toughness

• A measure of stiffness defined as the resistance to localized plastic deformation induced by either mechanical indentation or abrasion.

• Resilience

• Ability of a material to absorb energy when it is deformed elastically (MPa); combination of strength and elasticity over a short period of time.

• Fatigue Limit

• ability to absorb energy and NOT break. combination of strength and plasticity over a short period of time.

• Durability

• Ability to withstand wear, pressure, or damage; hard-wearing over a long period of time.

Tags

NGSS.HS-PS1-3

Match the following

• Malleability

• the ability to return to original shape after being deformed

• Elasticity

• ttened into thin sheets under applications of heavy compressive forces without cracking by hot or cold working means.This property of a material allows it to expand in all directions without rupture.

• Ductility

• tendency to break instead of deforming when a stress is applied

• Plasticity

• Ability of a material to deform under tensile load (% elongation). It is the property of a material by which it can be drawn into wires under the action of tensile force.

• Brittleness

• the material keeps the new shape after being deformed by a stress, i.e. a wet ball of clay

Match the following

• Surface roughness

• A material property defined as the amount of force normal to surface which converts to force resisting relative movement of contacting surfaces between material pairs. Dependent on the mass of the object and the surface roughness of the contacting surfaces.

• Strength

• A mechanical property defined as the ratio of the final to initial relative velocity between two objects after they collide. Range: 0-1, 1 for perfectly elastic collision.

• Coefficient of restitution

• A material property defined as the mass per unit volume (kg/m^3)

• Density

• resistance to distortion

• Friction coefficient

• A material property defined as the deviations in the direction of the normal vector of a real surface from its ideal form

Tags

NGSS.HS-PS2-3

Match the following types of strain.

• Compression

• The result of a twisting force, ex. wringing out a towel

• Axial

• The result of a pushing together or squeezing, i.e. bed springs, can crusher

• Flexural

• Occurs in the same direction as the applied stress. The ratio of the change in length of a material to the original length.

• Torsion

• The ratio of the horizontal displacement to the height of the block.

• Shear

• Results from bending due to a bending stress.

Match the following

• Stress

• The type of strain defined as a tendency of a material's particles to undergo plastic deformation due to a dislocation motion within the material. Common in Crystals.

• Force

• A push or a pull.

• Tension

• Force causing a deformation or change in shape

• Slip

• pulling along the length of a material, i.e. tug of war

• Strain

• is a measure of the deformation (change in size or shape) that occurs in a material due to applied stress.