Undercarriage — Landing-gear structural loads — oleo-strut shock absorption, ground-reaction spectra, and drop-test dynamic load factors.

• Oleo-strut stroke and energy absorption
• Drag-brace and side-brace load paths
• Axle, torque-link and lug margins

Wing — Wing-box bending, torsion, and shear flow under aerodynamic and inertial loading, with spar-cap and skin stress distribution.

• Spar-cap axial stress and shear-web flow
• Skin buckling between ribs and stringers
• Torsion and fuel/inertia relief cases

Fuselage — Pressurized-cylinder hoop and longitudinal stress, frame/stringer buckling, and cutout stress concentration.

• Hoop and longitudinal pressure stress
• Frame and stringer crippling
• Cutout reinforcement and fail-safe checks

Cabin — Cabin pressure-vessel structural response, decompression load cases, and floor-beam bending under payload and crash loads.

• Rapid-decompression pressure loads
• Floor-beam bending under payload
• Crash-load seat-track attachment margins

Flaps — Flap-track loads, hinge-moment and actuator sizing, and skin bending under high-lift deployment aerodynamic pressure.

• Flap-track and carriage loads
• Hinge moment and actuator sizing
• Skin and rib bending at deployment

Aileron — Aileron hinge-moment, actuator load, and control-surface flutter margin under roll-maneuver aerodynamic loading.

• Hinge moment and actuator load
• Flutter margin and mass balance
• Torsion box stress in roll maneuvers

Rudder — Rudder structural loading from yaw maneuvers and engine-out asymmetric thrust, plus hinge-moment and actuator sizing.

• Hinge and actuator loads
• Gust and asymmetric-thrust cases
• Torsion-box and attachment fitting margins

Elevator — Elevator aerodynamic loading, hinge-moment, and pitch-maneuver load-factor envelope (n vs V diagram).

• Hinge moment and trim-tab loads
• Balance and flutter-margin checks
• Spar and rib stress under maneuver loads

Flight Controls — Mechanical and hydraulic actuation load paths, cable or push-rod stress, and redundancy/failure-mode load redistribution.

• Linkage, bellcrank and rod-end margins
• Cable tension and pulley loads
• Actuator stall-load and jam cases

Engine — Engine-mount reaction loads, thrust and gyroscopic moments, and pylon fatigue under maneuver and gust spectra.

• Mount and thrust-link load paths
• Casing and flange bolt margins
• Gyroscopic and maneuver inertia loads

APU — Auxiliary power unit mount loading, vibration isolation, and bay structural response to APU-generated dynamic loads.

• Mounting loads and vibration isolation
• Exhaust duct thermal stress
• Firewall and bay structural margins

Ram Air Turbine — RAT deployment shock load, bay-door structural response, and emergency-power extraction dynamics.

• Deployment actuator and strut loads
• Blade centrifugal stress
• Door and hinge aerodynamic loads

Cargo Door — Cargo-door latch and hinge load paths, pressure-differential loading, and fail-safe structural margin.

• Latch and hinge load paths
• Pressure-induced door-frame stress
• Stop-fitting and cutout reinforcement

Passenger Door — Passenger-door pressure-seal loading, latch/hinge stress, and evacuation-slide attachment load cases.

• Plug-door stop-fitting loads
• Hinge-arm and mechanism margins
• Frame stress at the cutout

Emergency Exit — Emergency exit hatch structural margin, rapid-decompression load case, and quick-release mechanism stress.

• Hatch latch and stop margins
• Pressure and crash-load cases
• Frame and surround fatigue checks

Fuel System — Fuel-tank wing-box structural interaction, fuel-slosh inertial loads, and tank-wall pressure/vent stress.

• Tank wall and rib pressure loads
• Slosh and surge inertial pressure
• Pipe, coupling and bracket margins

Brakes — Brake-disc thermal-mechanical stress, torque-tube load path, and rejected-takeoff energy-absorption sizing.

• Brake-torque reaction at the strut
• Disc and stator thermal stress
• Torque-tube and piston-housing margins

Wheels — Wheel-hub stress under vertical, side, and drag loading, tire-pressure containment, and fatigue life under landing-cycle spectra.

• Rim and flange fatigue under radial load
• Bolt and tie-bolt preload
• Tire-burst and overload checks

Satellite — Satellite-bus structural loading under launch acceleration, vibration, and on-orbit thermal-cycling stress.

• Launch random-vibration and quasi-static loads
• Panel and bracket stiffness
• Thermal-cycle and deployment checks

Rocket — Launch-vehicle axial and bending stress from thrust and aerodynamic loading, plus pogo/buffet dynamic response.

• Axial and bending load factors
• Tank pressure and buckling margins
• Interstage and skirt stability

Weapons Systems — Store/pylon carriage loads, release dynamics, and captive-carriage fatigue under maneuver and buffet spectra.

• Pylon and launcher attachment loads
• Release and recoil transients
• Store carriage fatigue loads

Electronics Bay — Avionics-rack vibration isolation, thermal stress, and mounting-bracket fatigue under flight-spectrum loading.

• Rack and tray vibration response
• Fastener and bracket margins
• Thermal and shock environments

Cockpit Windshield — Windshield bird-strike impact loading, pressure-differential stress, and edge-seal fatigue.

• Pressure and bird-strike loads
• Frame and bolt-bearing margins
• Thermal gradient stress

Cabin Windows — Cabin-window acrylic pane stress under pressure cycling, fail-safe multi-pane redundancy, and edge/frame load transfer.

• Pane pressure and fail-safe loads
• Seal and retainer margins
• Frame-cutout stress concentration

Aircraft Fuselage Stresses — Pressurized-fuselage hoop and longitudinal skin stress, window-cutout stress concentration, and frame-bay deflection under cabin differential pressure.

Flight Comfort & Gust Response — Discrete-gust incremental load factor (Pratt gust method, FAR/CS-25 §25.341) and ride-comfort response under turbulence.

Turbine Disc & Blade — LP/HP turbine disc centrifugal stress (Timoshenko rotating-disc solution) and blade-root centrifugal pull, with combined rim-loading margin.

Compressor Blade — Compressor blade centrifugal + steady aero-bending mean stress checked against yield and a Goodman-diagram high-cycle-fatigue margin.

Jet Engine Drive Shaft — Drive shaft torsional shear stress and Rayleigh/simply-supported first lateral critical-speed check with rotor-dynamics separation margin.

Stator Vane — Stator vane cantilever aerodynamic bending stress plus constrained thermal-gradient stress, combined margin of safety.

Nozzle Guide Vane — NGV through-wall thermal-gradient stress plus cooling-air pressure hoop stress, with an illustrative thermal-fatigue life indicator.

Whole-Engine Rotor Summary — Simplified multi-station lumped-mass rotor screening — total mass, CG, bearing reactions, and first critical speed via Dunkerley’s method. Not a substitute for full-engine FEM.

Jet Engine Fuel Pump — Fuel pump casing pressure (hoop/longitudinal, Barlow) and mounting-bracket cantilever bending stress under vibratory inertial load.

Rocket Propellant Valve — Thick-wall valve body stress (Lamé thick-wall theory, von Mises) and poppet/seat Hertzian contact stress at MEOP.

Propellant Metering Manifold — Manifold branch Darcy-Weisbach flow pressure-drop (informational) alongside an independent Barlow hoop-stress structural margin.

Rocket Engine Vibration — Single-degree-of-freedom natural frequency and damped base-excitation transmissibility, with margin vs. an allowable component G-level.

Bird Strike — Jet Engine — Fan-blade leading-edge bird-strike preliminary screening using the published Wilbeck hydrodynamic impact model.

Bird Strike — Wing — Wing leading-edge bird-strike preliminary screening: Wilbeck impact pressure plus a kinetic-energy absorption check.

Bird Strike — Cockpit Windshield — Windshield bird-strike preliminary screening referencing FAR/CS-25.775, using the published Wilbeck impact-pressure model.

FE — ANSYS Input Deck Generator — Generates publicly-documented ANSYS APDL input syntax for a simple element model — reproduces no solver internals.

FE — NASTRAN Input Deck Generator — Generates publicly-documented NASTRAN bulk-data card syntax for a simple element model — reproduces no solver internals.

FE — Abaqus Input Deck Generator — Generates publicly-documented Abaqus keyword input syntax for a simple element model — reproduces no solver internals.

FE — FETNASTRAN Input Deck Generator — FeToolKit’s own free-format convenience deck generator for a simple element model — not affiliated with MSC/NASTRAN.

STRAN — SHELL8 Element — Classical smeared/equivalent stiffness properties for an 8-node shell element — a closed-form approximation, not a numerically-integrated element matrix.

STRAN — QUAD4 Element — Classical smeared/equivalent stiffness properties for a 4-node quad element — a closed-form approximation, not a numerically-integrated element matrix.

STRAN — CROD Element — Closed-form axial rod element stiffness, stress, and load-path check.

STRAN — CBAR Element — Closed-form beam element stiffness, combined bending/shear stress, and margin check.