MTS Fatigue Analyzer - Manual (Page 83)

Note:
If adjacent variable names are not separated by a space or function in the Calculation panel, they are
interpreted as a single variable name. This is likely to result in a “...variable..., was not found” error
message.
Errors panel
The Errors panel continually evaluates the calculation as you build it.
Note:
Calculations are validated only on syntax and references to variables and functions, not expected
results.
Variables panel
The Variables panel lists all variables defined for the test. Double-click a variable or click a variable and click
Insert to add the variable to the calculation. The cursor location in the Calculation panel shows the added
variable.
To sort the displayed variables, click a column heading to sort the variables by the values in that column.
Click the same column heading again to reverse the sort order.
Functions panel
The Functions panel contains a list of defined program functions and operators. Double-click a function or
click a function and then click Insert to add the function to the calculation.
Click the drop-down list to select specific categories of functions.
To sort the displayed functions, click a column heading to sort the functions by the values in that column.
Click the same column heading again to reverse the sort order.
Square brackets [ ] indicate you can add an optional parameter. Remove the square brackets regardless if
you add an optional parameter. A calculation error occurs if they are not removed.
Parentheses ( ) in the syntax means that you must add a parameter.
For example, the function below requires two variable parameters that contain the stress and strain data.
The start and end indexes for loading and unloading modulus calculations are optional because they are in
square brackets.
CycleModulus(Stress,Strain[, startIndexLoading,endIndexLoading, startIndexUnloading, endIndexUnloading])
Note:
The variable parameters between the parentheses are not the identities of the variables. They indicate
the type of variable that must be placed in the syntax.
7.5.2.0 Operators in a Calculation
The following table shows all the recognized operators organized by group and listed in order of precedence.
Within a group, all operators have the same precedence.
MTS TestSuite™ Fatigue Analyzer User Guide 83
7.0 Variable Analysis