public AluminumLimitStateValue GetLocalBucklingFlexuralCriticalStress(double b, double t, LateralSupportType LateralSupportType,
FlexuralCompressionFiberPosition CompressionLocation, WeldCase WeldCase,
SubElementType SubElementType = SubElementType.Flat)
{
double S_xc = GetSectionModulusCompressionSxc(CompressionLocation);
double M_np = this.GetPlasticMoment();
FlexuralLocalBucklingElement LocalElement = new FlexuralLocalBucklingElement(this.Section.Material, b, t, LateralSupportType,
M_np, S_xc, WeldCase, SubElementType);
double F_b = LocalElement.GetCriticalStress();
double F_y = 0;
if (WeldCase == Entities.WeldCase.NotAffected)
{
F_y = this.Section.Material.F_ty;
}
else
{
F_y = this.Section.Material.F_tyw;
}
if (F_b > F_y)
{
F_b = F_y;
}
return(new AluminumLimitStateValue(F_b, true));
}
//Direct Strength Method F.3-2
public AluminumLimitStateValue GetLocalBucklingStrength(double b, double t, LateralSupportType LateralSupportType,
FlexuralCompressionFiberPosition CompressionLocation, WeldCase WeldCase,
SubElementType SubElementType = SubElementType.Flat)
{
double S_xc = GetSectionModulusCompressionSxc(CompressionLocation);
double M_np = this.GetPlasticMoment();
FlexuralLocalBucklingElement LocalElement = new FlexuralLocalBucklingElement(this.Section.Material, b, t, LateralSupportType,
M_np, S_xc, WeldCase, SubElementType);
double F_b = LocalElement.GetCriticalStress();
double M_n = S_xc * F_b;
AluminumLimitStateValue Y = GetFlexuralYieldingStrength(CompressionLocation);
bool applicable;
double val;
if (M_n > Y.Value)
{
applicable = false;
val = -1.0;
}
else
{
applicable = true;
val = 0.9 * M_n;
}
return(new AluminumLimitStateValue(val, applicable));
}
public void AluminumElementReturnsLocalBucklingStressF_b()
{
//6063,T6,Up to 1,extrusion
AluminumMaterial mat = new AluminumMaterial("6063", "T6", "Up to 1", "extrusion");
//SectionBox sb = new SectionBox(null, 12, 4, 0.25, 0.25);
//AluminumSection alSec = new AluminumSection(mat,sb);
//AluminumFlexuralMember m = new AluminumFlexuralMember(alSec);
FlexuralLocalBucklingElement lbe = new FlexuralLocalBucklingElement(mat, 7, 0.25, LateralSupportType.OneEdge, 100, 80, Aluminum.AA.Entities.WeldCase.NotAffected);
double F_b = lbe.GetCriticalStress();
double refValue = 9.95;
double actualTolerance = EvaluateActualTolerance(F_b, refValue);
Assert.LessOrEqual(actualTolerance, tolerance);
}
public void AluminumShapeReturnsLocalBucklingStressF_b()
{
//6063,T6,Up to 1,extrusion
AluminumMaterial mat = new AluminumMaterial("6063", "T6", "Up to 1", "extrusion");
SectionBox sb = new SectionBox(null, 12, 4, 0.25, 0.25);
AluminumSection alSec = new AluminumSection(mat, sb);
AluminumFlexuralMember m = new AluminumFlexuralMember(alSec);
FlexuralLocalBucklingElement lbe = new FlexuralLocalBucklingElement(mat, 7, 0.25, LateralSupportType.OneEdge, 100, 80, Aluminum.AA.Entities.WeldCase.NotAffected);
double F_b = m.GetLocalBucklingFlexuralCriticalStress(7, 0.25, LateralSupportType.OneEdge, Common.Section.Interfaces.FlexuralCompressionFiberPosition.Top,
Aluminum.AA.Entities.WeldCase.NotAffected).Value;
double refValue = 9.95;
double actualTolerance = EvaluateActualTolerance(F_b, refValue);
Assert.True(actualTolerance <= tolerance);
}
