Question

Consider the following statements in respect of a thick cylinder subjected to internal pressure:
1. The stress on an element on the outer wall is unidirectional.
2. The stresses on an element on the inner wall are principal stresses.
3. The constants of the Lame's equation are positive.
Which of these statements are correct?

• A. $1$ and $2$
• B. $1$ and $3$
• C. $2$ and $3$
• D. $1,2$ and $3$

Answer 1

The correct option is D $1,2$ and $3$

The inner wall is subjected to radial pressure, and hoop stress only. The stress on the outer wall element has hoop stress only and radial stress is zero.