1.

The compatibility equation in terms of stress components in polar coordinates are given by ____________

A. (( frac{ ^2}{ r^2} + frac{1}{r} frac{ }{ r}+ frac{1}{r^2} frac{ ^2}{ ^2} )( _r+ _ )=0 )
B. (( frac{ ^2}{ r^2} + frac{1}{r} frac{ }{ r}+ frac{1}{r^2} frac{ ^2}{ ^2} )( _ )=0 )
C. (( frac{ ^2}{ r^2} + frac{1}{r} frac{ }{ r}+ frac{1}{r^2} frac{ ^2}{ ^2} )( _r )=0 )
D. (( frac{ ^2}{ r^2} + frac{1}{r} frac{ }{ r}+ frac{1}{r^2} frac{ ^2}{ ^2} )( _r+ _ )=1 )
Answer» B. (( frac{ ^2}{ r^2} + frac{1}{r} frac{ }{ r}+ frac{1}{r^2} frac{ ^2}{ ^2} )( _ )=0 )


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