Impliment IOneVaribleFunction to delegate

StructureHelperLogics/Models/Materials/IFunctionMaterial.cs

@@ -1,4 +1,6 @@
-using System;
+using StructureHelperCommon.Infrastructures.Interfaces;
+using StructureHelperCommon.Models.Materials.Libraries;
+using System;
 using System.Collections.Generic;
 using System.Linq;
 using System.Text;
@@ -8,6 +10,10 @@ namespace StructureHelperLogics.Models.Materials
 {
     internal interface IFunctionMaterial : IHelperMaterial
     {
-
+        double Modulus { get; set; }
+        double CompressiveStrength { get; set; }
+        double TensileStrength { get; set; }
+        List<IMaterialSafetyFactor> SafetyFactors { get; }
+        public IOneVariableFunction Function { get; set; }
     }
 }