Spars Wing Structures Aerospace Structures Function of spars - PowerPoint PPT Presentation

Spars Wing Structures Aerospace Structures

Function of spars Aerodynamic forces (Lift) create Carry wing bending loads bending

Spar Function The basic form is the I-beam. • • The spar consists of • Spar caps/girders (flanges) • Web (plate) The web performs the diagonal • function

Bending deformation Assume: wing clamped 4 1 @1 - little deformation @4 - strong deformation 4 1 Solutions: • Diagonal elements • Or better: sheets

Spar Lay-Out auxiliary spar false spar 3 spars

Spar Design The forces are greater at the root Þ the spar must be thicker (difficult with extruded spar caps) Solution: Built up adhesive bonded sheet metal

Spar types

Built-up Spars: Extrusion

Built-up Spars: Sheet Metal Forming