2D Aerospace Material Selection: Specific-Strength Ashby Chart

2D companion to the 3D aerospace-materials thermal-zone simulator: instead of heat, this chart shows the mass-minimization side of aerospace material choice — an Ashby-style log-log plot of specific strength vs. specific stiffness for aluminum, titanium, steel and carbon-fiber composite, with a live design-requirement line that screens out material classes as the load requirement tightens.