EMA 405 Coordinate Systems. Introduction There are many coordinate systems in ANSYS Global and...
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Transcript of EMA 405 Coordinate Systems. Introduction There are many coordinate systems in ANSYS Global and...
![Page 1: EMA 405 Coordinate Systems. Introduction There are many coordinate systems in ANSYS Global and Local: used to locate geometry items (nodes, keypoints,](https://reader035.fdocuments.us/reader035/viewer/2022071806/56649cd95503460f949a3496/html5/thumbnails/1.jpg)
EMA 405Coordinate Systems
![Page 2: EMA 405 Coordinate Systems. Introduction There are many coordinate systems in ANSYS Global and Local: used to locate geometry items (nodes, keypoints,](https://reader035.fdocuments.us/reader035/viewer/2022071806/56649cd95503460f949a3496/html5/thumbnails/2.jpg)
IntroductionThere are many coordinate systems in ANSYSGlobal and Local: used to locate geometry
items (nodes, keypoints, etc.)Display: determines systems in which
geometry is displayedNodal: degree of freedom directions and nodal
resultsElement: material properties and element
resultsResults: transforms nodal or element results for
listing or display (general postprocessor)Working plane: used for drawing geometric
primitives
![Page 3: EMA 405 Coordinate Systems. Introduction There are many coordinate systems in ANSYS Global and Local: used to locate geometry items (nodes, keypoints,](https://reader035.fdocuments.us/reader035/viewer/2022071806/56649cd95503460f949a3496/html5/thumbnails/3.jpg)
Results CoordinatesGeneral Postprocessor/Options
for OutputFor cylindrical, x-direction is r-
direction, y-direction is theta direction, z direction is axial direction
![Page 4: EMA 405 Coordinate Systems. Introduction There are many coordinate systems in ANSYS Global and Local: used to locate geometry items (nodes, keypoints,](https://reader035.fdocuments.us/reader035/viewer/2022071806/56649cd95503460f949a3496/html5/thumbnails/4.jpg)
Why do we need these
Element system: consider wood elements with grain at 45 degrees
Easiest to define E separately in grain direction and perpendicular direction (rotate element system 45 degrees)
x
y
![Page 5: EMA 405 Coordinate Systems. Introduction There are many coordinate systems in ANSYS Global and Local: used to locate geometry items (nodes, keypoints,](https://reader035.fdocuments.us/reader035/viewer/2022071806/56649cd95503460f949a3496/html5/thumbnails/5.jpg)
Why do we need these?
Orienting geometry elementsRectangles are always oriented
relative to working planeTo draw rectangle such as the one
below, rotate the working plane
![Page 6: EMA 405 Coordinate Systems. Introduction There are many coordinate systems in ANSYS Global and Local: used to locate geometry items (nodes, keypoints,](https://reader035.fdocuments.us/reader035/viewer/2022071806/56649cd95503460f949a3496/html5/thumbnails/6.jpg)
Why do we need these?
Nodal coordinatesWhat if we have a set of forces oriented radiallyJust select nodes on perimeter, change nodal
coordinate system to cylindrical, and then set Fx
![Page 7: EMA 405 Coordinate Systems. Introduction There are many coordinate systems in ANSYS Global and Local: used to locate geometry items (nodes, keypoints,](https://reader035.fdocuments.us/reader035/viewer/2022071806/56649cd95503460f949a3496/html5/thumbnails/7.jpg)
Exercise
p
Only radial displacement
s
Only radial displacement
s
Inner radius=5 cmOuter radius=10 cmAngular extent = 45 degreesE=200 GPa=0.3Pressure=1 MPa
![Page 8: EMA 405 Coordinate Systems. Introduction There are many coordinate systems in ANSYS Global and Local: used to locate geometry items (nodes, keypoints,](https://reader035.fdocuments.us/reader035/viewer/2022071806/56649cd95503460f949a3496/html5/thumbnails/8.jpg)
Exercise
p=1 MPa E=200 GPa =0.3 Inner radius is fixed Inner radius = 5 cm Outer radius = 10 cm
radiusouterR
thicknesst
nodesof
ptRF
o
o
#
2