diff --git a/kratos.gid/apps/Structural/xml/ConstitutiveLaws.xml b/kratos.gid/apps/Structural/xml/ConstitutiveLaws.xml
index 75dc3577b..f6e17e09f 100644
--- a/kratos.gid/apps/Structural/xml/ConstitutiveLaws.xml
+++ b/kratos.gid/apps/Structural/xml/ConstitutiveLaws.xml
@@ -137,7 +137,7 @@
     </CLaw>
 
     <!--constitutive laws for shells and membranes-->
-    <CLaw n="LinearElasticPlaneStress_Hybrid_3D" KratosName="LinearElasticPlaneStress2DLaw" pn="Linear Elastic"  Type="PlaneStress" Behaviour="Elastic" StrainSize="6"  ImplementedInApplication="StructuralMechanicsApplication"
+    <CLaw n="LinearElasticPlaneStress_Hybrid_3D" KratosName="ReissnerMindlinShellElasticConstitutiveLaw" pn="Linear Elastic"  Type="PlaneStress" Behaviour="Elastic" StrainSize="6"  ImplementedInApplication="StructuralMechanicsApplication"
       help="Linear elastic behaviour in 3D for shells" Dimension="3D" LargeDeformation="False" RequiresLocalAxes="False" HybridType="D-R" AllowsAnisotropy="False" >
         <inputs>
             <parameter n="DENSITY" pn="Density"/>
@@ -174,7 +174,7 @@
     </CLaw>
 
     <!--constitutive laws for beams-->
-    <CLaw n="BeamConstitutiveLaw2D" KratosName="BeamConstitutiveLaw" pn="Linear elastic beam"  Type="Beam2D" Behaviour="Elastic"
+    <CLaw n="TimoshenkoBeamConstitutiveLaw2D" KratosName="TimoshenkoBeamElasticConstitutiveLaw" pn="Linear elastic beam"  Type="Beam2D" Behaviour="Elastic"
           StrainSize="1" ImplementedInApplication="StructuralMechanicsApplication" help="Linear elastic behaviour for beams"
           Dimension="2D" LargeDeformation="False" RequiresLocalAxes="False" HybridType="False">
         <inputs>
@@ -183,11 +183,12 @@
             <parameter n="POISSON_RATIO" pn="Poisson Ratio" v="0.29"/>
             <parameter n="CROSS_AREA" pn="Cross area" v="1.0" unit_magnitude="Area" units="m^2" />
             <parameter n="I33" pn="Inertia 33" type="double" v="1.0" unit_magnitude="L^4" units="m^4" />
+            <parameter n="AREA_EFFECTIVE_Y" pn="Shear area" type="double" v="0.8" unit_magnitude="L^2" units="m^2" />
         </inputs>
         <outputs></outputs>
     </CLaw>
 
-    <CLaw n="BeamConstitutiveLaw3D" KratosName="BeamConstitutiveLaw" pn="Linear elastic beam"  Type="Beam3D" Behaviour="Elastic"
+    <CLaw n="BeamConstitutiveLaw3D" KratosName="TimoshenkoBeamElasticConstitutiveLaw3D" pn="Linear elastic beam"  Type="Beam3D" Behaviour="Elastic"
           StrainSize="1" ImplementedInApplication="StructuralMechanicsApplication" help="Linear elastic behaviour for beams"
           Dimension="3D" LargeDeformation="False" RequiresLocalAxes="False" HybridType="False">
         <inputs>
@@ -195,9 +196,11 @@
             <parameter n="YOUNG_MODULUS" pn="Young Modulus" unit_magnitude="P" units="Pa" v="206.9e9" />
             <parameter n="POISSON_RATIO" pn="Poisson Ratio" v="0.29"/>
             <parameter n="CROSS_AREA" pn="Cross area" v="1.0" unit_magnitude="Area" units="m^2" />
-            <parameter n="TORSIONAL_INERTIA" pn="Torsional inertia" type="double" v="1.0" unit_magnitude="L^4" units="m^4" />
+            <parameter n="IT" pn="Torsional inertia" type="double" v="1.0" unit_magnitude="L^4" units="m^4" />
             <parameter n="I22" pn="Inertia 22" type="double" v="1.0" unit_magnitude="L^4" units="m^4" />
             <parameter n="I33" pn="Inertia 33" type="double" v="1.0" unit_magnitude="L^4" units="m^4" />
+            <parameter n="AREA_EFFECTIVE_Y" pn="Shear area" type="double" v="0.8" unit_magnitude="L^2" units="m^2" />
+            <parameter n="AREA_EFFECTIVE_Z" pn="Shear area" type="double" v="0.8" unit_magnitude="L^2" units="m^2" />
         </inputs>
         <outputs></outputs>
     </CLaw>
diff --git a/kratos.gid/apps/Structural/xml/Elements.xml b/kratos.gid/apps/Structural/xml/Elements.xml
index 34f9cfe6c..7df96249e 100644
--- a/kratos.gid/apps/Structural/xml/Elements.xml
+++ b/kratos.gid/apps/Structural/xml/Elements.xml
@@ -438,11 +438,11 @@
   <!--structural elements-->
   <!--shell elements-->
   <!--large displacements-->
-  <ElementItem n="ShellThinCorotationalElement" pn="Shell thin corotational" ov="surface" ImplementedInFile="shell_thin_element_3DxN.cpp" ImplementedInApplication="StructuralMechanicsApplication" MinimumKratosVersion="9000"  WorkingSpaceDimension="3D" LocalSpaceDimension="2" RequiresLocalAxes="True" LargeDeformation="True" help="This element implements a corotational element for thin shells in a large displacements approach" ElementType="Shell" RotationDofs="True" AnalysisType="linear,non_linear">
+  <ElementItem n="ShellThickLinearElement" pn="Shell thick linear" ov="surface" ImplementedInFile="shell_thick_element_3DxN.cpp" ImplementedInApplication="StructuralMechanicsApplication" MinimumKratosVersion="9000"  WorkingSpaceDimension="3D" LocalSpaceDimension="2" RequiresLocalAxes="True" LargeDeformation="False" help="This element implements a linear element for thick shells in a small displacements approach" ElementType="Shell" RotationDofs="True" AnalysisType="linear,non_linear">
     <!--here we could add a list of all of the possible geometries-->
     <TopologyFeatures>
-      <item GeometryType="Triangle" nodes="3" KratosName="ShellThinElementCorotational3D3N"/>
-      <item GeometryType="Quadrilateral" nodes="4" KratosName="ShellThinElementCorotational3D4N"/>
+      <item GeometryType="Triangle" nodes="3" KratosName="CSDSG3ThickShellLinearElement3D3N"/>
+      <item GeometryType="Quadrilateral" nodes="4" KratosName="MITCThickShellElement3D4N"/>
     </TopologyFeatures>
     <!-- here we add the block of features which we require from the constitutive law-->
     <ConstitutiveLaw_FilterFeatures>
@@ -479,8 +479,46 @@
   <ElementItem n="ShellThickCorotationalElement" pn="Shell thick corotational" ov="surface" ImplementedInFile="shell_thick_element_3DxN.cpp" ImplementedInApplication="StructuralMechanicsApplication" MinimumKratosVersion="9000"  WorkingSpaceDimension="3D" LocalSpaceDimension="2" RequiresLocalAxes="True" LargeDeformation="True" help="This element implements a corotational element for thick shells in a large displacements approach" ElementType="Shell" RotationDofs="True" AnalysisType="linear,non_linear">
     <!--here we could add a list of all of the possible geometries-->
     <TopologyFeatures>
-      <item GeometryType="Triangle" nodes="3" KratosName="ShellThickElementCorotational3D3N"/>
-      <item GeometryType="Quadrilateral" nodes="4" KratosName="ShellThickElementCorotational3D4N"/>
+      <item GeometryType="Triangle" nodes="3" KratosName="CSDSG3ThickShellCorotationalElement3D3N"/>
+      <item GeometryType="Quadrilateral" nodes="4" KratosName="MITCThickShellCorotationalElement3D4N"/>
+    </TopologyFeatures>
+    <!-- here we add the block of features which we require from the constitutive law-->
+    <ConstitutiveLaw_FilterFeatures>
+      <filter field="Type" value="PlaneStress"/>
+      <filter field="Dimension" value="3D"/>
+      <filter field="StrainSize" value="6"/>
+      <filter field="HybridType" value="D-R"/>
+    </ConstitutiveLaw_FilterFeatures>
+    <!--define list of NodalConditions-->
+    <NodalConditions>
+      <NodalCondition n="DISPLACEMENT" />
+      <NodalCondition n="ROTATION" />
+      <NodalCondition n="CONTACT"/>
+      <NodalCondition n="CONTACT_SLAVE"/>
+      <NodalCondition n="VELOCITY" />
+      <NodalCondition n="ACCELERATION" />
+      <NodalCondition n="ANGULAR_VELOCITY"/>
+      <NodalCondition n="ANGULAR_ACCELERATION" />
+    </NodalConditions>
+    <inputs>
+      <parameter n="THICKNESS" pn="Thickness" v="1.0" unit_magnitude="L" units="m" />
+    </inputs>
+    <outputs>
+      <parameter n="SHELL_FORCE_GLOBAL" pn="Shell forces" v="false" />
+      <parameter n="SHELL_MOMENT_GLOBAL" pn="Shell moments" v="false" />
+      <parameter n="SHELL_STRESS_TOP_SURFACE_GLOBAL" pn="Stress - top surface" v="false" />
+      <parameter n="SHELL_STRESS_MIDDLE_SURFACE_GLOBAL" pn="Stress - mid surface" v="false" />
+      <parameter n="SHELL_STRESS_BOTTOM_SURFACE_GLOBAL" pn="Stress - bottom surface" v="false" />
+      <parameter n="VON_MISES_STRESS_TOP_SURFACE" pn="Von Mises stress - top surface" v="true" />
+      <parameter n="VON_MISES_STRESS_MIDDLE_SURFACE" pn="Von Mises stress - mid surface" v="true" />
+      <parameter n="VON_MISES_STRESS_BOTTOM_SURFACE" pn="Von Mises stress - bottom surface" v="true" />
+    </outputs>
+  </ElementItem>
+  <ElementItem n="ShellThinCorotationalElement" pn="Shell thin corotational" ov="surface" ImplementedInFile="shell_thin_element_3DxN.cpp" ImplementedInApplication="StructuralMechanicsApplication" MinimumKratosVersion="9000"  WorkingSpaceDimension="3D" LocalSpaceDimension="2" RequiresLocalAxes="True" LargeDeformation="True" help="This element implements a corotational element for thin shells in a large displacements approach" ElementType="Shell" RotationDofs="True" AnalysisType="linear,non_linear">
+    <!--here we could add a list of all of the possible geometries-->
+    <TopologyFeatures>
+      <item GeometryType="Triangle" nodes="3" KratosName="ShellThinElementCorotational3D3N"/>
+      <item GeometryType="Quadrilateral" nodes="4" KratosName="ShellThinElementCorotational3D4N"/>
     </TopologyFeatures>
     <!-- here we add the block of features which we require from the constitutive law-->
     <ConstitutiveLaw_FilterFeatures>
@@ -514,6 +552,7 @@
       <parameter n="VON_MISES_STRESS_BOTTOM_SURFACE" pn="Von Mises stress - bottom surface" v="true" />
     </outputs>
   </ElementItem>
+
   <!--membrane elements-->
   <ElementItem n="PrestressedMembraneElement" pn="Membrane prestressed" ov="surface" ImplementedInFile="prestress_membrane_element.cpp" ImplementedInApplication="StructuralMechanicsApplication" MinimumKratosVersion="9000"  WorkingSpaceDimension="3D" LocalSpaceDimension="2" RequiresLocalAxes="False" LargeDeformation="False" help="This element it implements a membrane structural model" RotationDofs="False" ElementType="Membrane" AnalysisType="non_linear">
     <!--here we could add a list of all of the possible geometries-->
@@ -550,7 +589,7 @@
   <!--beam elements-->
   <ElementItem n="LinearBeamElement2D" pn="Beam small displacements" ov="line" ImplementedInFile="small_displacement_beam_element_3D2N.cpp" ImplementedInApplication="StructuralMechanicsApplication" MinimumKratosVersion="9000"  WorkingSpaceDimension="2D" LocalSpaceDimension="1" RequiresLocalAxes="False" LargeDeformation="False" help="This element implements a small displacement timoshenko beam structural model" RotationDofs="True" ElementType="Beam" AnalysisType="linear,non_linear">
     <TopologyFeatures>
-      <item GeometryType="Line" nodes="2" KratosName="CrLinearBeamElement2D2N"/>
+      <item GeometryType="Line" nodes="2" KratosName="LinearTimoshenkoBeamElement2D2N"/>
     </TopologyFeatures>
     <ConstitutiveLaw_FilterFeatures>
       <filter field="Type" value="Beam2D"/>
@@ -596,7 +635,7 @@
   </ElementItem>
   <ElementItem n="LinearBeamElement3D" pn="Beam small displacements" ov="line" ImplementedInFile="small_displacement_beam_element_3D2N.cpp" ImplementedInApplication="StructuralMechanicsApplication" MinimumKratosVersion="9000"  WorkingSpaceDimension="3D" LocalSpaceDimension="1" RequiresLocalAxes="True" LocalAxesAutomaticFunction="Structural::xml::AddLocalAxesToBeamElement" LargeDeformation="False" help="This element implements a small displacement timoshenko beam structural model" RotationDofs="True" ElementType="Beam" AnalysisType="linear,non_linear">
     <TopologyFeatures>
-      <item GeometryType="Line" nodes="2" KratosName="CrLinearBeamElement3D2N"/>
+      <item GeometryType="Line" nodes="2" KratosName="LinearTimoshenkoBeamElement3D2N"/>
     </TopologyFeatures>
     <ConstitutiveLaw_FilterFeatures>
       <filter field="Type" value="Beam3D"/>
@@ -644,7 +683,7 @@
   <ElementItem n="TrussLinearElement2D" pn="Truss small displacements" ov="line" ImplementedInFile="truss_element_3D2N.cpp" ImplementedInApplication="StructuralMechanicsApplication" MinimumKratosVersion="9000"  WorkingSpaceDimension="2D" LocalSpaceDimension="1" RequiresLocalAxes="False" LargeDeformation="False" help="This element implements a small displacements truss" RotationDofs="False" ElementType="Truss" AnalysisType="linear,non_linear">
     <!--here we could add a list of all of the possible geometries-->
     <TopologyFeatures>
-      <item GeometryType="Line" nodes="2" KratosName="TrussLinearElement3D2N"/>
+      <item GeometryType="Line" nodes="2" KratosName="LinearTrussElement2D2N"/>
     </TopologyFeatures>
     <!-- here we add the block of features which we require from the constitutive law-->
     <ConstitutiveLaw_FilterFeatures>
@@ -668,7 +707,7 @@
   <ElementItem n="TrussElement2D" pn="Truss large displacements" ov="line" ImplementedInFile="truss_element_3D2N.cpp" ImplementedInApplication="StructuralMechanicsApplication" MinimumKratosVersion="9000"  WorkingSpaceDimension="2D" LocalSpaceDimension="1" RequiresLocalAxes="False" LargeDeformation="True" help="This element implements a large displacements truss" RotationDofs="False" ElementType="Truss" AnalysisType="non_linear">
     <!--here we could add a list of all of the possible geometries-->
     <TopologyFeatures>
-      <item GeometryType="Line" nodes="2" KratosName="TrussElement3D2N"/>
+      <item GeometryType="Line" nodes="2" KratosName="TotalLagrangianTrussElement2D2N"/>
     </TopologyFeatures>
     <!-- here we add the block of features which we require from the constitutive law-->
     <ConstitutiveLaw_FilterFeatures>
@@ -692,7 +731,7 @@
   <ElementItem n="TrussLinearElement3D" pn="Truss small displacements" ov="line" ImplementedInFile="truss_element_3D2N.cpp" ImplementedInApplication="StructuralMechanicsApplication" MinimumKratosVersion="9000"  WorkingSpaceDimension="3D" LocalSpaceDimension="1" RequiresLocalAxes="False" LargeDeformation="False" help="This element implements a small displacements truss" RotationDofs="False" ElementType="Truss" AnalysisType="linear,non_linear">
     <!--here we could add a list of all of the possible geometries-->
     <TopologyFeatures>
-      <item GeometryType="Line" nodes="2" KratosName="TrussLinearElement3D2N"/>
+      <item GeometryType="Line" nodes="2" KratosName="LinearTrussElement3D2N"/>
     </TopologyFeatures>
     <!-- here we add the block of features which we require from the constitutive law-->
     <ConstitutiveLaw_FilterFeatures>
@@ -716,7 +755,7 @@
   <ElementItem n="TrussElement3D" pn="Truss large displacements" ov="line" ImplementedInFile="truss_element_3D2N.cpp" ImplementedInApplication="StructuralMechanicsApplication" MinimumKratosVersion="9000"  WorkingSpaceDimension="3D" LocalSpaceDimension="1" RequiresLocalAxes="False" LargeDeformation="True" help="This element implements a large displacements truss" RotationDofs="False" ElementType="Truss" AnalysisType="non_linear">
     <!--here we could add a list of all of the possible geometries-->
     <TopologyFeatures>
-      <item GeometryType="Line" nodes="2" KratosName="TrussElement3D2N"/>
+      <item GeometryType="Line" nodes="2" KratosName="TotalLagrangianTrussElement3D2N"/>
     </TopologyFeatures>
     <!-- here we add the block of features which we require from the constitutive law-->
     <ConstitutiveLaw_FilterFeatures>