Recitation 5 - Dr. S

Recitation 5

By: Alexandra Salinas​

Equations Needed For Today

​Critical Load

​Critical Stress

​Parallel Axis Theorem

​2nd Moment of Areas

Stiffness Values (K)

​Pinned/Pinned

K = 1​

​Fixed/Free

K = 2

​Fixed/Fixed

K = 0.5

Fixed/Pinned

K = 0.7

An aluminum alloy column

(E = 73.1 GPa, σ_Y = 250MPa) has a length of 6 m and is pinned at both ends. If the cross-sectional area has the dimensions shown, determine the critical load, critical stress, and Factor of Safety.

​Question 1

An aluminum alloy column

(E = 73.1 GPa, σ_Y = 250MPa) has a length of 6 m and is fixed/pinned. If the cross-sectional area has the dimensions shown, determine the critical load, critical stress, and Factor of Safety.

​Question 2

An aluminum alloy column

(E = 73.1 GPa, σ_Y = 250MPa) has a length of 6 m and is fixed/fixed. If the cross-sectional area has the dimensions shown, determine the critical load, critical stress, and Factor of Safety.

​Question 3

An aluminum alloy column

(E = 73.1 GPa, σ_Y = 250MPa) has a length of 6 m and is fixed/free. If the cross-sectional area has the dimensions shown, determine the critical load, critical stress, and Factor of Safety.

​Question 4

Multiple Select

Question 5: Which type of column support can be used for this system?

• Pinned/Pinned

• Fixed/Pinned

• Fixed/Fixed

• Fixed/Free

Determine the Maximum Force P that can be applied to the truss without causing any of the members to buckle.

​

​Question 6

Multiple Choice

Question 7: Of all the P-values we solved for, which is the maximum value that can be inflicted to the system without causing any of the members to buckle?

• 6688 lb

• 3266 lb

• 6531 lb