Parse lower/mixed case input files

Abaqus input files are case insensitive.

Previously, the element type (e.g. C3D4 == c3d4)
and the NSET and ELSET options were not recognized
if lower or mixed case.

Note: Boundary conditions and loads are read verbatim
(i.e. symbols :P or :p are created for pressure loads
depending on the case used in the input file)
which may cause confusion.

src/parse_mesh.jl

@@ -140,7 +140,7 @@ function parse_section(model, lines, ::Symbol, idx_start, idx_end, ::Type{Val{:E
     regexp = r"TYPE=([\w\-\_]+)"i
     m = match(regexp, definition)
     m == nothing && error("Could not match regexp $regexp to line $definition")
-    element_type = m[1]
+    element_type = uppercase(m[1])
     eltype_sym = Symbol(element_type)
     eltype_nodes = element_has_nodes(Val{eltype_sym})
     element_type = element_has_type(Val{eltype_sym})
@@ -172,8 +172,8 @@ end
 function parse_section(model, lines, key, idx_start, idx_end, ::Union{Type{Val{:NSET}},
         Type{Val{:ELSET}}})
     data = Integer[]
-    set_regex_string = Dict(:NSET  => r"NSET=([\w\-\_]+)",
-                            :ELSET => r"ELSET=([\w\-\_]+)" )
+    set_regex_string = Dict(:NSET  => r"NSET=([\w\-\_]+)"i,
+                            :ELSET => r"ELSET=([\w\-\_]+)"i)
     selected_set = key == :NSET ? "node_sets" : "element_sets"
     definition = lines[idx_start]
     regex_string = set_regex_string[key]

test/test_parse_model_mixed_case.jl

@@ -0,0 +1,39 @@
+# This file is a part of JuliaFEM.
+# License is MIT: see https://github.com/JuliaFEM/AbaqusReader.jl/blob/master/LICENSE
+
+using AbaqusReader: abaqus_read_model
+using AbaqusReader: parse_keyword
+
+datadir = first(splitext(basename(@__FILE__)))
+
+@testset "parse abaqus inp file to AbaqusModel" begin
+    fn = joinpath(datadir, "cube_tet4_mixed_case.inp")
+    model = abaqus_read_model(fn)
+
+    @test length(model.properties) == 1
+    section = first(model.properties)
+    @test section.element_set == :Cube
+    @test section.material_name == :Mat
+
+    @test haskey(model.materials, :Mat)
+    material = model.materials[:Mat]
+    @test isapprox(first(material.properties).E, 208.0e3)
+
+    @test length(model.steps) == 1
+    step = first(model.steps)
+    @test length(step.boundary_conditions) == 2
+
+    bc = step.boundary_conditions[1]
+    @test bc.data[1] == [:Sym23, 1]
+    @test bc.data[2] == [:Sym13, 2]
+
+    load = step.boundary_conditions[2]
+    @test load.data[1] == [:Load, :p, 1.00000]
+end
+
+@testset "parse keyword" begin
+    k = parse_keyword("*SURFACE, NAME=TIE, SURFACE TO SURFACE")
+    @test k.options[1] == ("NAME" => "TIE")
+    @test k.options[2] == "SURFACE TO SURFACE"
+    @test_throws(Exception, parse_keyword("*SURFACE, MOI=HEI=EI"))
+end

test/test_parse_model_mixed_case/cube_tet4_mixed_case.inp

@@ -0,0 +1,61 @@
+*Node, Nset=Nall
+1,                4.07417,        3.51532,        4.43035
+2,                6.24583,        4.69753,        6.40067
+3,1.0e1,10.00000,0.00000
+4,               1.0E1,        0.00000,        0.00000
+5,                0.00000,        0.00000,        0.00000
+6,                0.00000,       10.00000,        0.00000
+7,                0.00000,       10.00000,       10.00000
+8,                0.00000,        0.00000,       10.00000
+9, 100.0e-1,10.00000,10.00000
+10,100.0E-1,0.00000,10.00000
+*Element, Type=C3d4, Elset=Cube
+         1,         8,        10,         1,         2
+         2,         4,         1,        10,         2
+         3,         3,         9,         7,         2
+         4,         3,         5,         4,         1
+         5,         8,         7,         2,         1
+         6,         5,         6,         8,         1
+         7,         7,         6,         1,         8
+         8,         7,         9,         8,         2
+         9,         5,         8,        10,         1
+        10,         3,         6,         5,         1
+        11,         4,        10,         9,         2
+        12,         1,         7,         2,         3
+        13,         3,         4,         9,         2
+        14,         3,         1,         4,         2
+        15,         4,         5,        10,         1
+        16,         8,         9,        10,         2
+        17,         3,         6,         1,         7
+*Solid Section, Elset=Cube, Material=Mat
+*Material, Name=Mat
+*Elastic
+2.08000e+005, 3.00000e-001
+*Nset, Nset=Sym12
+         5,         6,         3,         4,
+*Nset, Nset=Sym23
+         5,         6,         7,         8,
+*Nset, Nset=Sym13
+         5,        10,         8,         4,
+*Surface, Type=Element, Name=Load
+        16, S1
+         8, S1
+*Surface, Name=Order , Type=Element
+        16, S1
+         8, S1
+*Boundary
+Sym12, 3
+*Step
+*Static
+*Boundary
+Sym23, 1
+Sym13, 2
+*Dsload
+Load, p, 1.00000
+*Node File
+ Coord
+ u
+*Node Print
+ Coord
+ u
+*End Step