From 60580cc45adb20dbf1284a3229213ba790ae5bac Mon Sep 17 00:00:00 2001
From: Martin Diehl <mail@martin-diehl.net>
Date: Mon, 23 Dec 2019 07:16:50 +0100
Subject: [PATCH] mixed up left/right stretch tensor

---
 python/damask/mechanics.py | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/python/damask/mechanics.py b/python/damask/mechanics.py
index 5503d7048..08f5ca125 100644
--- a/python/damask/mechanics.py
+++ b/python/damask/mechanics.py
@@ -58,10 +58,10 @@ def strain_tensor(F,t,m):
 
     """
     F_ = F.reshape((1,3,3)) if F.shape == (3,3) else F
-    if   t == 'U':
+    if   t == 'V':
         B   = np.matmul(F_,transpose(F_))
         w,n = np.linalg.eigh(B)
-    elif t == 'V':
+    elif t == 'U':
         C   = np.matmul(transpose(F_),F_)
         w,n = np.linalg.eigh(C)