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Aidan Lehal

Aidan Lehal

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Things to consider:

  • Roll Cage

  • Impact Force

  • Attachment requirements

  • Stiffness

  • Strength

  • Tube-Tube Attachment Type

  • Manufacturing Type

Tube Profiles

  • Square

  • Cylinder

  • Rectangle (volumetrically inefficient)

  • I-Beam (unidirectional applications)

Tube Types

  • Hollow

  • Solid (too heavy)

Criteria

Square (10 in of 1x1x1/16in)

Round (10 in of 1in D x 1/16in t)

Benefits

  • Probably easier to mount things onto (brackets, fasteners, etc.)

  • Moment of inertia (x/y) = 0.0345

    • ~52% Stiffer as a beam (vertical/horizontal deflection)

      • for equivalent diameter

    • ~29% Stiffer in torsion

      • for equivalent diameter

  • Easier to cut

  • Easier to clamp for welding

  • Moment of inertia = 0.0203

    • ~27% lighter

      • for equivalent diameter

  • Complex curvature is easier to manufacture (roll cage)

  • Better disperses the load, resulting in less stress

  • Easier to design with (cross bracing and chassis members can be put together at any orientation).

...

Important Note: When designing to optimize strength to weight ratio, making a tube diameter larger before making it thicker will have a higher strength increase and lower weight increase than making it thicker.

MSXVII Chassis Design:https://uwmidsun.atlassian.net/l/c/zfCy6M90