Merge pull request #354 from adtzlr/change-dof-shear

Enhance `dof.shear(compression=(0, 0)`

CHANGELOG.md

@@ -6,6 +6,7 @@ All notable changes to this project will be documented in this file. The format
 ### Changed
 - Enhance plotting with custom `x`- and `y`-data in `CharacteristicCurve.plot(x, y)` and allow a list of items for force evaluation in `CharacteristicCurve(items=[...])` to be passed.
 - Enhance `math.linsteps(points=[0, 5, 0], num=[5, 10])` by supporting a list of substeps.
+- Enhance compression of shear loadcase: Apply the compression on the bottom and the top `dof.shear(compression=(0, 0))`.
 
 ## [6.0.0] - 2022-11-20
 

felupe/dof/_loadcase.py

@@ -130,7 +130,7 @@ def planar(field, right=1, move=0.2, clamped=False):
     return bounds, dict(dof0=dof0, dof1=dof1, ext0=ext0)
 
 
-def shear(field, bottom=0, top=1, move=0.2, compression=0.0, sym=True):
+def shear(field, bottom=0, top=1, move=0.2, compression=(0, 0), sym=True):
     """Define boundaries for shear loading between two clamped plates. The
     bottom plate remains fixed while the shear is applied at the top plate."""
 
@@ -142,8 +142,13 @@ def shear(field, bottom=0, top=1, move=0.2, compression=0.0, sym=True):
         bounds = {}
 
     bounds["bottom"] = Boundary(f, fy=bottom, skip=(0, 1, 0))
-    bounds["compression"] = Boundary(f, fy=bottom, skip=(1, 0, 1), value=compression)
-    bounds["top"] = Boundary(f, fy=top, skip=(1, 0, 0))
+    bounds["top"] = Boundary(f, fy=top, skip=(1, 1, 0))
+    bounds["compression_bottom"] = Boundary(
+        f, fy=bottom, skip=(1, 0, 1), value=compression[0]
+    )
+    bounds["compression_top"] = Boundary(
+        f, fy=top, skip=(1, 0, 1), value=-compression[1]
+    )
     bounds["move"] = Boundary(f, fy=top, skip=(0, 1, 1), value=move)
 
     dof0, dof1 = partition(field, bounds)