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--- wiki:sns:intactgh:beginner_ex_4 [2024/01/23 08:30] – graham
+++ wiki:sns:intactgh:beginner_ex_4 [2024/01/31 12:13] (current) – [Hide CAD Model] graham
@@ Line 4: / Line 4: @@
 {{:wiki:sns:intactgh:orthotropic_transformation.zip}}
-This example demonstrates a workflow for correctly orienting fiber directions based on arbitrary geometries with grasshopper transformation matrices. Following this, a basic static simulation utilizes this newly aligned orthotropic material.
+This example demonstrates a workflow for correctly orienting fiber directions to arbitrary geometries using grasshopper transformation matrices. Following this, a basic static simulation setup is provided with the transformed orthotropic material.
   * The key steps involved in setting up the simulation are explained here.
@@ Line 42: / Line 42: @@
   - Select an origin point
   - Select a X-axis direction point (fiber direction)
-  - Select a Y-axis direction point (follow right-hand rule so the Z-axis or normal points where you want)
+  - Select a Y-axis direction point (follow right-hand rule so the Z-axis/normal points where you want)
   - Connect this plane component to the target plane of the "Orient" component where the source plane is the world XY.
   - This transformation can then be used for an orthotropic material or the matrix can be stored and multiplied if needed.
@@ Line 56: / Line 56: @@
   - Extract surface/plane and use the "Evaluate Surface" component to get the normal and flip the direction if needed. (*here the list item component is used as the geometry is a simple box)
-  - Repeat this process for the surface/plane where the normal is aligned with the fiber direction.
+  - Repeat this process for the surface/plane where the normal is aligned with the fiber direction (can get these vectors in many other ways as well)
-  - (Can get these vectors in many other ways as well)
   - Create a "Plane Normal" component, and attach the normal vector to the Z-axis. (A)
   - Attach this plane to the "Align Plane" and also attach the fiber direction vector to the direction input. (B)
@@ Line 73: / Line 72: @@
 {{:wiki:sns:intactgh:orthotropic_transformations_grasshopper_transformations_multi.png}}
+Here the resultant matrix [B]=[A2]*[A1] where [A2] is rotating about the newly oriented z' axis and [A1] is aligning the xyz' axis to the fiber direction. Note that with this ordering the xyz' axis is oriented first then we rotate that oriented system for simulating alternate fiber orientations such as [-45, 45] plies.
 =====Visualization=====
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 =====Hide CAD Model=====
   * To better visualize you can hide the geometry in Rhino or set the display to wireframe. This will prevent the object from interfering with the visualization of the simulation.
-The displacement distribution resulting from this static simulation example is displayed below. The maximum displacement is near .5 mm. To load the simulation results later, create a simulation reader block, right-click, select the simulation, and connect it to a visualize block.
+The displacement distribution resulting from this static simulation example is displayed below. The maximum displacement is near 0.07 mm for fibers aligned along the x' (no second rotation). For the 45-degree CW rotation, it should be closer to 0.53 mm. To load the simulation results later, create a simulation reader block, right-click, select the simulation, and connect it to a visualize block.
 {{:wiki:sns:intactgh:orthotropic_transformations_displacement.png}}