Calculate Linearized Stress
Decompose a throughthickness elastic stress field into equivalent membrane, bending, and peak stresses for comparison with appropriate allowable limits.
 On the Project Tree, open the Analysis Workbench.
 Click (Pick info).
 In the dialog, select the Linearized stress tab.
 Optional:
Enter the failure criteria for Membrane stress, Membrane + bending stress and
Peak stress to see the pass/fail status of the created segment. The default
values are calculated using the material’s yield stress.
Membrane stress = 2/3 of Yield stress
Membrane + bending stress = Yield stress
Peak stress = 2x Yield stress
When multiple materials are present in the model, the material with highest yield stress is used to calculate default allowables.

Under Stress linearization segment, define the line segment in one of the
following ways:
Option Steps Normal to surface Activate the Normal to surface radio button. SimSolid launches a ray which is normal to the surface and passes through the part.
Custom  Activate the Custom radio button.
 In the modeling window, pick the entry
and exit points on the part.
The entry and exit point coordinates are populated in the dialog.
Normal to datum points  Activate the Normal to datum points radio button.
 In the dropdown menu, select a point set.
Linearized local stresses are evaluated on the fly and posted in the dialog for each line segment defined. By default, invariants are displayed in the table. 
Select the Show linearized stress tensor components
check box to view stress tensor components along with invariants.
Tip: Status of the line shows passed or failed based on the failure criteria. Failure criteria is only evaluated on the invariants.
 Optional:
Save linearized stress information as a CSV file.
 Click Save to CSV.
 In the dialog, enter a file name and select a save location.
 Click Save.
Calculation Method
SimSolid method for calculating linearized stress.
Linearized stress decomposes a throughthickness elastic stress field into equivalent membrane, bending, and peak stresses for comparison with appropriate allowable limits.
 The stress is extracted by interpolation in a local coordinate system at all
the points along the line. The local coordinate system is based on the start
and end points of the stress linearization segment. The Xaxis of the system is along the segment from entry to exit points. The other two axes are calculated as follows:
 If the local xaxis is not parallel to the global
yaxis:
Z_{local} = X_{local} x Y_{global}
Y_{local} = Z_{local} x X_{local}
 If the local xaxis is parallel to the global yaxis:
local yaxis (Y_{local}) is negative of globalx if localx is along positive globaly, and vice versa.
Z_{local} = X_{local} x Y_{local}
 If the local xaxis is not parallel to the global
yaxis:
 From the extracted stress values above, the average membrane stress tensor +
bending stress tensors at the entry and exit points are calculated using
numerical integration.
${\sigma}_{i}^{m}\text{\hspace{0.17em}}=\text{\hspace{0.17em}}\frac{1}{L}{\displaystyle {\int}_{L/2}^{L/2}{\sigma}_{i}dx}$
${\sigma}_{iS}^{b}\text{\hspace{0.17em}}=\text{\hspace{0.17em}}\frac{6}{{L}^{2}}{\displaystyle {\int}_{\frac{L}{2}}^{\frac{L}{2}}{\sigma}_{i}xdx}$
${\sigma}_{iE}^{b}\text{\hspace{0.17em}}=\text{\hspace{0.17em}}{\sigma}_{iS}^{b}$
${\sigma}_{i}^{m}$ = i^{th} component of membrane stress
${\sigma}_{i}$ = i^{th} component of extracted stress value
${\sigma}_{iS}^{b}$ = i^{th}component of bending stress at the entry
${\sigma}_{iE}^{b}$ = i^{th} component of bending stress at the exit
L = Length of the Stress linearization segment
x = position of a point along the segment
 Peak stress and membrane and bending stress are also calculated at the entry
and exit.
${\sigma}_{iS}^{p}\text{\hspace{0.17em}}=\text{\hspace{0.17em}}{\sigma}_{iS}\text{\hspace{0.17em}}\text{\hspace{0.17em}}\left({\sigma}_{i}^{m}\text{\hspace{0.17em}}+\text{\hspace{0.17em}}{\sigma}_{iS}^{b}\right)$
${\sigma}_{iE}^{p}\text{\hspace{0.17em}}=\text{\hspace{0.17em}}{\sigma}_{iE}\text{\hspace{0.17em}}\text{\hspace{0.17em}}\left({\sigma}_{i}^{m}\text{\hspace{0.17em}}+\text{\hspace{0.17em}}{\sigma}_{iE}^{b}\right)$
${\sigma}_{iS}^{p}$ = i^{th} component of peak stress at the entry
${\sigma}_{iE}^{p}$ = i^{th} component of peak stress at the exit
 Finally, invariants for the membrane, membrane + bending, and peak stresses are calculated.