Definitions - Parameters
Parameters defining the original length of the pin, L0, and the current length, L, are used to calculate the initial strain. The prestrain is the only load acting on the structure, which is fixed at the bolt holes.
Parameters
1
Browse to the Structural_Mechanics_Module\Tutorials folder and double-click to open bracket_basic.mph.
2
In the Home toolbar click Parameters  and select Parameters 1 .
In the Parameters table, define a strain value that corresponds to a reduction of the pin length from 215 mm to 214 mm.
3
In the Settings window for Parameters, locate the Parameters section.
4
In the table, add the following rows:
Name
Expression
Value
Description
L0
215[mm]
0.21500 m
Initial pin length
L
214[mm]
0.21400 m
Current pin length
InitStrain
(L-L0)/L0
-0.0046512
Pin strain