ENG1001B Tutorial Week 10

Each rod in the picture is made from the same stock and experiences the same unaxial force. Which has the highest stress?

• A

• B

• C

• D

• E

As before, each rod is made from the same stock & under load are extended by the same amount. Which experiences the largest force?

• A

• B

• C

• D

Given the stress-strain curves in the picture, which material is the most brittle?

• A

• B

• C

Given the stress-strain curves in the picture, which material has the most ductile response?

• 1340 Steel

• Stainless steel (18-8)

• Aluminium alloy 2024-T81

• Structural steel (mild steel)

• Magnesium

On the following stress-strain graph, which region denotes the elastic/plastic strain, and which is recovered after fracture?

• A: elastic, not recovered; B plastic, recovered

• A: elastic, recovered; B plastic, not recovered

• A: plastic, not recovered; B elastic, recovered

• A: plastic, recovered; B elastic, not recovered