From a6123d3ccccbc62704596082b7b33c433865a726 Mon Sep 17 00:00:00 2001
From: Patrick Jaap <patrick.jaap@tu-dresden.de>
Date: Tue, 18 Aug 2020 13:37:46 +0200
Subject: [PATCH] MooneyRivlinDensity: Correct comment
---
dune/elasticity/materials/mooneyrivlindensity.hh | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/dune/elasticity/materials/mooneyrivlindensity.hh b/dune/elasticity/materials/mooneyrivlindensity.hh
index 5cac603..cbad678 100644
--- a/dune/elasticity/materials/mooneyrivlindensity.hh
+++ b/dune/elasticity/materials/mooneyrivlindensity.hh
@@ -68,8 +68,8 @@ public:
There are three Mooney-Rivlin-Variants:
ciarlet: W(F) = mooneyrivlin_a*(normF)^2 + mooneyrivlin_b*(normFinv)^2*detF + mooneyrivlin_c*(detF)^2 -
((dim-1)*mooneyrivlin_a + mooneyrivlin_b + 2*mooneyrivlin_c)*ln(detF)
- log: W(F) = \sum_{i,j=0}^{i+j<=n} mooneyrivlin_ij * (I1 - 3)^i * (I2 - 3)^j + mooneyrivlin_k * ln(det(F))
- square: W(F) = \sum_{i,j=0}^{i+j<=n} mooneyrivlin_ij * (I1 - 3)^i * (I2 - 3)^j + mooneyrivlin_k * 0.5 * (det(F) - 1)
+ log: W(F) = \sum_{i,j=0}^{i+j<=n} mooneyrivlin_ij * (I1 - 3)^i * (I2 - 3)^j + mooneyrivlin_k * ln(det(F))^2
+ square: W(F) = \sum_{i,j=0}^{i+j<=n} mooneyrivlin_ij * (I1 - 3)^i * (I2 - 3)^j + mooneyrivlin_k * 0.5 * (det(F) - 1)^2
For log and square: I1 and I2 are the first two invariants of C (or B), multiplied with a factor depending on det(F):
I1 = (det(F)^(-2/dim)) * [ first invariant of C ]
--
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