From 39bcd5ca63022d68f74221d805e6901b62e864ee Mon Sep 17 00:00:00 2001
From: Sadjad <65682889+Sad-Abd@users.noreply.github.com>
Date: Mon, 23 Oct 2023 20:40:16 +0330
Subject: [PATCH] Update _hyperelasticity_isotropic.py concerning #136

Modified the definition of `C`
---
 src/matadi/models/_hyperelasticity_isotropic.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/matadi/models/_hyperelasticity_isotropic.py b/src/matadi/models/_hyperelasticity_isotropic.py
index 1ca1258..aba4f0d 100644
--- a/src/matadi/models/_hyperelasticity_isotropic.py
+++ b/src/matadi/models/_hyperelasticity_isotropic.py
@@ -8,7 +8,7 @@ def linear_elastic(F, mu, lmbda):
 
 
 def saint_venant_kirchhoff(F, mu, lmbda):
-    C = dot(transpose(F), F)
+    C = transpose(F) @ F
     I1 = trace(C) / 2 - 3 / 2
     I2 = trace(C @ C) / 4 - trace(C) / 2 + 3 / 4
     return mu * I2 + lmbda * I1**2 / 2