Consider a mass hanging from a simple circular rod. Determine how the stress and strain in the rod are effected by changes to the area of the rod, length of the rod, and the attached mass. Assume that the strain is small enough that it remains in the linear portion of the stress ?strain curve.

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Part B ? Determine the elastic modulus

A stress-strain curve for a particular sample is shown. Based on the given data, determine the elastic modulus for the material.

Express your answer to three significant figures with the appropriate units.

Part C ? Beyond the proportional limit

The figure shows several stress-strain curves with different behaviors. The material most likely described by each curve.

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Part D - Interpret the behavior of materials Consider a structural component subject to some nominal toad so that it experiences a stress 0?; . Under some unusual circumstances not considered by the designers. the component is subject to a much larger stress 02 for a short period of time before the load returns to normal. Consider each of the stress-strain curves shown. Rank the materials based on the permanent strain that would occur to the component it it was made of each material. Rank the materials from largest permanent strain to smallest permanent strain. To rank items as equivalent, overtap them.

Mass increase decrease Double the area Double the mass Double the length Double the area and the weight no change Stress |||| Strain 0000 | MPa 219- 196- 69.4- 0.000677 0.394 0.448 3 0 A Value t Units ]] ? ceramic plastic metal b reset ? help 8 O 8 8 8 Reset Help