Add curvature calculator

StructureHelperLogics/NdmCalculations/Cracking/ICrackForceResult.cs

@@ -0,0 +1,20 @@
+using LoaderCalculator.Data.Ndms;
+using StructureHelperCommon.Models.Calculators;
+using StructureHelperCommon.Models.Forces;
+
+namespace StructureHelperLogics.NdmCalculations.Cracking
+{
+    public interface ICrackForceResult : IResult
+    {
+        IForceTuple CrackedStrainTuple { get; set; }
+        IForceTuple EndTuple { get; set; }
+        double FactorOfCrackAppearance { get; set; }
+        bool IsSectionCracked { get; set; }
+        IEnumerable<INdm> NdmCollection { get; set; }
+        double PsiS { get; set; }
+        IForceTuple ReducedStrainTuple { get; set; }
+        IForceTuple SofteningFactors { get; set; }
+        IForceTuple StartTuple { get; set; }
+        IForceTuple TupleOfCrackAppearance { get; set; }
+    }
+}