From 1d18d3b63465ff53cdeabd6d4bad0feb7e5bb229 Mon Sep 17 00:00:00 2001
From: Jonathan Youett <youett@math.fu-berlin.de>
Date: Fri, 9 Mar 2018 16:17:26 +0100
Subject: [PATCH] Add method to compute the stress
---
dune/gfe/rodlocalstiffness.hh | 26 ++++++++++++++++++++++++++
1 file changed, 26 insertions(+)
diff --git a/dune/gfe/rodlocalstiffness.hh b/dune/gfe/rodlocalstiffness.hh
index 8d268fbd..25328d86 100644
--- a/dune/gfe/rodlocalstiffness.hh
+++ b/dune/gfe/rodlocalstiffness.hh
@@ -117,6 +117,10 @@ public:
const Entity& element,
const Dune::FieldVector<double,1>& pos) const;
+ Dune::FieldVector<RT, 6> getStress(const std::vector<RigidBodyMotion<RT,3> >& localSolution,
+ const Entity& element,
+ const Dune::FieldVector<double,1>& pos) const;
+
protected:
void getLocalReferenceConfiguration(const Entity& element,
@@ -502,6 +506,28 @@ getStrain(const std::vector<RigidBodyMotion<RT,3> >& localSolution,
return strain;
}
+template <class GridType, class RT>
+Dune::FieldVector<RT, 6> RodLocalStiffness<GridType, RT>::
+getStress(const std::vector<RigidBodyMotion<RT,3> >& localSolution,
+ const Entity& element,
+ const Dune::FieldVector<DT, 1>& pos) const
+{
+ const auto& indexSet = gridView_.indexSet();
+ std::vector<TargetSpace> localRefConf = {referenceConfiguration_[indexSet.subIndex(element, 0, 1)],
+ referenceConfiguration_[indexSet.subIndex(element, 1, 1)]};
+
+ auto&& strain = getStrain(localSolution, element, pos);
+ auto&& referenceStrain = getStrain(localRefConf, element, pos);
+
+ Dune::FieldVector<RT, 6> stress;
+ for (int i=0; i < dim; i++)
+ stress[i] = (strain[i] - referenceStrain[i]) * A_[i];
+
+ for (int i=0; i < dim; i++)
+ stress[i+3] = (strain[i+3] - referenceStrain[i+3]) * K_[i];
+ return stress;
+}
+
template <class GridType, class RT>
void RodLocalStiffness<GridType, RT>::
--
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