Question 1

You have been tasked to investigate the feasibliity of a new design for an aircraft's wing frame. If the frame is subjected to a torque of T = 3,000 kNm, find the average shear stress and the angle of twist per unit length.

Click below to show answer. X

Step 1:
Calculate mean enclosed area A_m

Step 1:
Calculate mean enclosed area A_m

Thin-Walled Tubes with Closed Cross-Sections solution step 1

Step 2:
Calculate average shear stress τ_avg

Step 2:
Calculate average shear stress τ_avg

Thin-Walled Tubes with Closed Cross-Sections solution step 2

Step 3:
Calculate Φ per unit length (i.e. Φ/L)

Step 3:
Calculate Φ per unit length (i.e. Φ/L)

Thin-Walled Tubes with Closed Cross-Sections solution step 3

Useful formula:

Useful formula:

Thin-Walled Tubes with Closed Cross-Sections formula

Now that you've mastered this question, you can try Question 2.

Question 1

Question 1

Step 1: Calculate mean enclosed area Am Step 1: Calculate mean enclosed area Am

Step 2: Calculate average shear stress τavg Step 2: Calculate average shear stress τavg

Step 3: Calculate Φ per unit length (i.e. Φ/L) Step 3: Calculate Φ per unit length (i.e. Φ/L)

Useful formula: Useful formula:

Step 1:
Calculate mean enclosed area A_m

Step 1:
Calculate mean enclosed area A_m

Step 2:
Calculate average shear stress τ_avg

Step 2:
Calculate average shear stress τ_avg

Step 3:
Calculate Φ per unit length (i.e. Φ/L)

Step 3:
Calculate Φ per unit length (i.e. Φ/L)

Useful formula:

Useful formula: