How do I write the exponentiation operation in a resultant expression?

Answer:

A resultant can be defined in ADINA-PLOT using the interface menu

Definitions > Variable > Resultant...

or using the command RESULTANT.

Use two asterisk (**) for the exponentiation operator. For example,

<STRESS-YY>**2

As an example on how the exponentiation operator is used in an expression, the velocity magnitude resultant VELOCITY_MAGNITUDE is defined as

SQRT(<X-VELOCITY>**2 + <Y-VELOCITY>**2 + <Z-VELOCITY>**2)