(Solved): 8.42 The steel pipe \( A B \) has a \( 72-\mathrm{mm} \) outer diameter and a \( 5-\mathrm{mm} \) w ...

8.42 The steel pipe \( A B \) has a \( 72-\mathrm{mm} \) outer diameter and a \( 5-\mathrm{mm} \) wall thickness. Knowing that the arm \( C D E \) is rigidly attached to the pipe, determine the principal stresses, principal planes, and the maximum shearing stress at point \( H \). 8.43 The steel pipe \( A B \) has a \( 72-\mathrm{mm} \) outer diameter and a \( 5-\mathrm{mm} \) wall thickness. Knowing that arm \( C D E \) is rigidly attached to the pipe, determine the principal stresses and the maximum shearing stress at point \( K \).