ConcreteBucklingCalculator was added

StructureHelperLogics/NdmCalculations/Buckling/ConstDeltaELogic.cs

@@ -0,0 +1,16 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace StructureHelperLogics.NdmCalculations.Buckling
+{
+    public class ConstDeltaELogic : IConcreteDeltaELogic
+    {
+        public double GetDeltaE()
+        {
+            return 1.5d;
+        }
+    }
+}