Hollow elliptical section, outer and inner boundaries similar ellipses
<img src="https://eng-calculations.com/SVG/Roark(and39)s_formulas_for_Stress_and_Strain/Formulas_for_torsional_deformation_and_stress_(TABLE_10(and46)1)/Hollow elliptical section, outer and inner boundaries similar ellipses.svg" alt="Hollow_elliptical_section,_outer_and_inner_boundaries_similar_ellipses" title="Hollow_elliptical_section,_outer_and_inner_boundaries_similar_ellipses">
https://eng-calculations.com/SVG/Roark(and39)s_formulas_for_Stress_and_Strain/Formulas_for_torsional_deformation_and_stress_(TABLE_10(and46)1)/Hollow elliptical section, outer and inner boundaries similar ellipses.svg