AnalysisViewModal and StrainTuple was added

StructureHelperCommon/Services/Forces/StrainTupleService.cs

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+using LoaderCalculator.Data.Matrix;
+using StructureHelperCommon.Models.Forces;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace StructureHelperCommon.Services.Forces
+{
+    public static class StrainTupleService
+    {
+        public static void CopyProperties (IStrainTuple source, IStrainTuple target, double factor = 1 )
+        {
+            target.Kx = source.Kx * factor;
+            target.Ky = source.Ky * factor;
+            target.EpsZ = source.EpsZ * factor;
+            target.Gx = source.Gx * factor;
+            target.Gy = source.Gy * factor;
+            target.Gz = source.Gz * factor;
+        }
+
+        public static IStrainMatrix ConvertToLoaderStrainMatrix(IStrainTuple strainTuple)
+        {
+            IStrainMatrix strainMatrix = new StrainMatrix() { Kx = strainTuple.EpsZ, Ky = strainTuple.Ky, EpsZ = strainTuple.EpsZ };
+            return strainMatrix;
+        }
+
+        public static IStrainTuple ConvertToStrainTuple(IStrainMatrix strainMatrix)
+        {
+            IStrainTuple strainTuple = new StrainTuple() { Kx = strainMatrix.Kx, Ky = strainMatrix.Ky, EpsZ = strainMatrix.EpsZ };
+            return strainTuple;
+        }
+    }
+}