{"id":32639,"date":"2019-01-14T14:48:08","date_gmt":"2019-01-14T14:48:08","guid":{"rendered":"\/forum\/forums\/topic\/rotating-esys-in-a-section-in-apdl-around-element-center-points\/"},"modified":"2019-01-14T14:48:08","modified_gmt":"2019-01-14T14:48:08","slug":"rotating-esys-in-a-section-in-apdl-around-element-center-points","status":"closed","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/rotating-esys-in-a-section-in-apdl-around-element-center-points\/","title":{"rendered":"Rotating ESYS in a section in APDL around element center points"},"content":{"rendered":"

Hello all,<\/p>\n

<\/p>\n

I am a new user of Ansys APDL and I have a problem which I can’t find the solution for. I am using 2D solid PLANE182 elements to which I want to apply orthotropic material properties (composite material, for now just the global properties to keep things basic). For this the 1-coordinate of the element coordinate system (ESYS) should be in the direction of the primary material axis (x), and the 2-coordinate perpendicular to this.<\/p>\n

<\/p>\n

The section I have a problem with is shown below. The horizontal and vertical section are fine (simply using LOCAL,0,x,y,z,-90 for the vertical section), but I can’t get the ESYS correct for the curved section. I used LOCAL,1,x,y,z, to create a cylindrical coordinate system where x,y is the center point of the arc, but as shown this creates the 1-direction in the radial direction and the 2-direction in the tangential direction with respect to the center point. As you can see below all the ESYS in the curved section should be rotated by 90 degrees.<\/p>\n

<\/p>\n

What could be a solution to this? When having the relevant elements selected, is there a command to rotate them individually? I assume not, because then the cylindrical coordinate system is not valid anymore. Else, is there maybe a way to create a *DO loop over all the elements and extract the current orientation (as shown below), create a new Cartesian LOCAL in the center of all elements, rotate the extracted ESYS orientation by 90 degrees and then using EMODIF,,ESYS,[new LOCAL #]? Or is there a simpler way? I am not yet very familiar with loops in APDL.<\/p>\n

<\/p>\n

Any help is greatly appreciated!<\/p>\n

<\/p>\n

Kind regards,
Milan<\/p>\n

<\/p>\n

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