Merge pull request #24 from ngomezve/materials_dev

Small additions to new materials properties
MIT-LAE · Mar 26, 2024 · b7f7f0e · b7f7f0e
2 parents de85b97 + 0284a55
commit b7f7f0e
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Showing 3 changed files with 30 additions and 5 deletions.
diff --git a/src/material_data/MaterialProperties.toml b/src/material_data/MaterialProperties.toml
@@ -29,6 +29,19 @@
     UTS = 505e6  #Ultimate tensile strength
     shear_strength = 300e6
 
+[Al-2219-T87]
+    description = """Aluminum-copper alloy with high strength, resistance to corrosion cracking and enhanced cryogenic properties.
+    Uses: Low-temperature structures, cryogenic fuel storage"""
+
+    source = "https://www.matweb.com/search/datasheet_print.aspx?matguid=86215ca4233a49fdb6b556235fc726b7"
+    density = 2840.0 #kg/m3
+    youngs_modulus = 73.1e9 #Pa
+    shear_modulus = 27e9 #Pa
+    poissons_ratio = 0.33
+    YTS = 393e6 #Yield tensile strength
+    UTS = 476e6  #Ultimate tensile strength
+    shear_strength = 280e6
+
 [Ti-6242]
     description = "Titanium 6242 alloy"
     #Structural properties: https://www.matweb.com/search/datasheet_print.aspx?matguid=66f20965748441d8916768ed80be0cba

diff --git a/src/misc/materials.jl b/src/misc/materials.jl
@@ -10,7 +10,7 @@ Generic structural alloy.
 
 $TYPEDFIELDS
 """
-struct StructuralAlloy
+@kwdef struct StructuralAlloy
     """Density [kg/m³]"""
     ρ::Float64
     """Young's Modulus [Pa]"""
@@ -23,6 +23,12 @@ struct StructuralAlloy
     σmax::Float64
     """Maximum Shear [Pa]"""
     τmax::Float64
+    """Yield tensile strength [Pa]"""
+    YTS::Float64
+    """Ultimate tensile strength [Pa]"""
+    UTS::Float64
+    """Ultimate shear strength [Pa]"""
+    USS::Float64
 end
 
 """
@@ -38,7 +44,7 @@ Material specified needs to have the following data in the database:
 - τmax: Maximum Shear [Pa]
 """
 function StructuralAlloy(material::String; max_avg_stress = 1.1, safety_factor = 1.5)
-    local MatProp, ρ, E, G, ν, σmax, τmax
+    local MatProp, ρ, E, G, ν, σmax, τmax, YTS, UTS, USS
     try
         MatProp = MaterialProperties[material]
     catch
@@ -49,12 +55,15 @@ function StructuralAlloy(material::String; max_avg_stress = 1.1, safety_factor =
             E    = MatProp["youngs_modulus"]
             G    = MatProp["shear_modulus"]
             ν    = MatProp["poissons_ratio"]
-            σmax = MatProp["YTS"]/max_avg_stress/safety_factor
-            τmax = MatProp["shear_strength"]/max_avg_stress/safety_factor
+            YTS  = MatProp["YTS"]
+            UTS  = MatProp["UTS"]
+            USS  = MatProp["shear_strength"]
+            σmax = YTS/max_avg_stress/safety_factor
+            τmax = USS/max_avg_stress/safety_factor
         catch 
             error("Insufficient data in database for $material to build a StructuralAlloy")
         else
-            StructuralAlloy(ρ, E, G, ν, σmax, τmax)
+            StructuralAlloy(ρ, E, G, ν, σmax, τmax, YTS, UTS, USS)
         end
     end
 

diff --git a/test/unit_test_materials.jl b/test/unit_test_materials.jl
@@ -9,6 +9,9 @@
         Al = StructuralAlloy("Al-7075"; max_avg_stress = 1.0, safety_factor = 2.0)
         @test Al.σmax == database["Al-7075"]["YTS"]/1.0/2.0
         @test Al.τmax == database["Al-7075"]["shear_strength"]/1.0/2.0
+        @test Al.YTS == database["Al-7075"]["YTS"]
+        @test Al.UTS == database["Al-7075"]["UTS"]
+        @test Al.USS == database["Al-7075"]["shear_strength"]
     end
 
     @testset "Conductors" begin