Wing StructuresElmer Wu

Spars

Shear Webs

Spar Caps

Stringers

Skin

Components

Internal Structure

Important I: Spars

Take the shear/torsional forces on the aircraft wings

# of spars directly translate to # of cells within the cross sectional area of our wing

OBJECTIVE: minimize # and thickness of spars while maintaining stable structure

Use 166A shear flow analysis for calculations

Process

Step 1: Beam Analysis

Step 2: Location of max moment/shear values

Step 3: Approximation of cell sections

Step 4: Shear analysis on wing

Step 5: Find suitable materials with satisfactory G and E values while minimizing Δt and cost