public static double WarpingConstant(this ISectionProfile profile)
{
if (profile.IsNull())
{
return(0);
}
double width = profile.Width;
double height = profile.Height;
double tf = profile.FlangeThickness;
double tw = profile.WebThickness;
return(tf * Math.Pow(height - tf, 2) * Math.Pow(width, 3) / 24);
}
public static double TorsionalConstant(this ISectionProfile profile)
{
if (profile.IsNull())
{
return(0);
}
double b = profile.Width;
double h = profile.Height;
double tf = profile.FlangeThickness;
double tw = profile.WebThickness;
double r = profile.RootRadius;
double alpha = AlphaTJunction(tw, tf, r);
double D = InscribedDiameterTJunction(tw, tf, r);
return((2 * b * Math.Pow(tf, 3) + (h - 2 * tf) * Math.Pow(tw, 3)) / 3 + 2 * alpha * Math.Pow(D, 4) - 0.42 * Math.Pow(tf, 4));
}