Crack Calculator was added

StructureHelperLogics/MaterialBuilders/Decorators/IDecoratorOption.cs

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+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace StructureHelperLogics.MaterialBuilders
+{
+    internal interface IDecoratorOption : IMaterialOption
+    {
+    }
+}

StructureHelperLogics/MaterialBuilders/Decorators/RestrictStrainDecorator.cs

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+using LoaderCalculator.Data.Materials;
+using StructureHelperCommon.Services;
+using StructureHelperLogics.MaterialBuilders.Decorators;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace StructureHelperLogics.MaterialBuilders
+{
+    internal class RestrictStrainDecorator : IMaterialBuilder
+    {
+        IMaterialBuilder builder;
+        public IMaterialOption MaterialOption { get; set; }
+
+        public RestrictStrainDecorator(IMaterialBuilder builder)
+        {
+            this.builder = builder;
+        }
+
+        public IMaterial GetMaterial()
+        {
+            CheckOptions();
+            var option = (RestrictStrainOption)MaterialOption;
+            var material = new Material();
+            material.InitModulus = builder.GetMaterial().InitModulus;
+            material.DiagramParameters = new List<double>()
+            {
+                option.MaxTensileStrain,
+                option.MaxCompessionStrain
+            };
+            material.Diagram = GetStressDiagram;
+            return material;
+        }
+
+        private void CheckOptions()
+        {
+            CheckObject.CompareTypes(typeof(RestrictStrainOption), MaterialOption.GetType());
+        }
+
+        private double GetStressDiagram(IEnumerable<double> parameters, double strain)
+        {
+            var maxTensileStrain = parameters.ToList()[0];
+            var maxCompressionStrain = parameters.ToList()[1];
+            if (strain > maxTensileStrain || strain < maxCompressionStrain)
+            {
+                return 0d;
+            }
+            else
+            {
+                var material = builder.GetMaterial();
+                return material.Diagram.Invoke(parameters, strain);
+            }
+        }
+    }
+}

StructureHelperLogics/MaterialBuilders/Decorators/RestrictStrainOption.cs

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+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace StructureHelperLogics.MaterialBuilders.Decorators
+{
+    internal class RestrictStrainOption : IDecoratorOption
+    {
+        private double maxTensileStrain;
+        private double maxCompessionStrain;
+
+        public double MaxTensileStrain
+        {
+            get => maxTensileStrain;
+            set
+            {
+                if (value < 0d)
+                {
+                    //to do exception
+                }
+                maxTensileStrain = value;
+            }
+        }
+        public double MaxCompessionStrain { get => maxCompessionStrain; set => maxCompessionStrain = value; }
+    }
+}