### 2.1.11. Sampling Points

Sampling Points can be used in postprocessing mode to access to ply-wise results. In addition the Sampling Point functionality provides lay-up plots, through-the-thickness postprocessing plots, and laminate engineering constants.

ACP samples through the element near the given coordinates. After the update all plies (Modeling Ply, Production Ply, and Analysis Ply) are listed and can be selected for postprocessing. In the General tab of the Sampling Point Properties dialog the sampling point and direction can be defined.

Figure : Sampling Point Properties - General Tab

- Sampling Point: The sampling point in global coordinates. The nearest element to the point is the sample.

- Sampling Direction: Normal direction of the sampling point. The ply sequence will be given in this direction.

- Element ID (Label): Element number closest to the defined sampling point. (informational only)

A detailed description of the options Offset is Middle and Consider Coupling Effect can be found in Analysis Options.

Use the [ and ] buttons to navigate easily through the ply definition.

The Analysis tab of the Sampling Point Properties dialog provides extended postprocessing functionality. The lay-up and ply sequence can be visualized and analyzed based on the classical laminate theory polar properties and laminate stiffnesses. The distributions of the postprocessing results (strains, stresses, and failure criteria) are shown in 2-D plots. The view postprocessing results, the solution, and the set of interest must be selected.

The lay-up visualization can be set to display Modeling, Production, and Analysis Plies present in the Sampling Point. The Material, Thickness, and Angle can be displayed additionally as text labels for every ply in the plot. The angle displayed for Modeling and Production Plies always matches the design angle in the Modeling Ply and Material definitions. Note that the angle for the Analysis Ply is always given in relation to the reference direction of the Sampling Point. This reference direction is indicated by a yellow arrow at the Sampling Point in the scene. You can change the reference direction in the General tab if desired.

Note: Classical Laminate Theory is described in Classical Laminate Theory.

Figure : Layup Sequence and Enhanced Postprocessing

Stresses and strains shown in the 2-D plot are the values at the element center (interpolated) at the top and bottom of the layer. The 2-D failure plot shows the worst IRF, RF or MoS factor of all failure criteria, failure modes evaluated, and integration point level.

Release 18.2 - © ANSYS, Inc. All rights reserved.