Rib: Height Range 50-300 mm, Thickness Range 1.5-6.0 mm

Component Specifications

Definition

In aerospace engineering, a rib is a critical structural element typically arranged perpendicular to spars in airframe construction. It maintains the aerodynamic contour of wings and control surfaces while transferring aerodynamic loads to primary structures. Ribs create the airfoil shape, prevent skin buckling, and provide attachment points for other components. They are engineered with lightening holes, cutouts, and stiffeners to optimize strength-to-weight ratio while accommodating systems like fuel lines, electrical wiring, and control mechanisms.

Working Principle

Ribs work by distributing concentrated loads (aerodynamic pressure, inertial forces) across larger surface areas through their geometric arrangement and material properties. They transform localized stresses into manageable distributed loads that transfer to spars and longerons. The rib's web resists shear forces while flanges handle bending moments. Their spacing (rib pitch) is calculated based on skin panel stability requirements and load intensity to prevent structural deformation during flight maneuvers.

Materials

Aerospace-grade aluminum alloys (7075-T6, 2024-T3), titanium alloys (Ti-6Al-4V), or carbon fiber reinforced polymers (CFRP) with epoxy matrices. Material selection depends on specific application: aluminum for cost-effective structures, titanium for high-temperature zones, composites for weight-critical applications.

Technical Parameters

Parameter	Typical range	Notes & selection driver
Rib Pitch	150-400 mm
Height Range	50-300 mm
Weight Target	0.8-3.2 kg/m²
Surface Finish	Ra 3.2 μm maximum
Thickness Range	1.5-6.0 mm
Temperature Range	-55°C to +180°C

Ranges are indicative industry figures for RFQ preparation, not a supplier commitment. Confirm every value and standard with the legal manufacturer before ordering.

Standards

ISO 9001, AS9100, MIL-STD-1530, DIN 65151

Parent Products

This component is used in the following industrial products

Aerospace Structural Components

Critical load-bearing elements designed to withstand extreme aerospace operational conditions including high stress, temperature variations, and dynamic forces.

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Engineering Analysis

Risks & Mitigation

Fatigue cracking at attachment points
Corrosion in aluminum components
Delamination in composite ribs
Buckling under compressive loads
Resonance-induced vibration damage

FMEA Triads

Trigger: Stress concentration at lightening hole edges
Failure: Crack propagation leading to structural failure
Mitigation: Implement elliptical hole shapes with radiused edges, apply shot peening for compressive residual stresses, conduct regular NDT inspections

Trigger: Galvanic corrosion between dissimilar materials
Failure: Material degradation and loss of structural integrity
Mitigation: Use compatible material combinations, apply protective coatings, install insulating separators, implement corrosion monitoring systems

Trigger: Improper fastener installation
Failure: Joint loosening and load path disruption
Mitigation: Follow controlled torque procedures, use self-locking fasteners, implement installation verification protocols, conduct regular joint inspections

Industrial Ecosystem

Compatible With

Typical Suppliers & Equivalents

Compliance & Inspection

Tolerance

±0.2mm for critical dimensions, ±0.5mm for non-critical features, angular tolerance ±0.5°

Test Method

Ultrasonic testing for internal defects, dye penetrant inspection for surface cracks, coordinate measuring machine (CMM) verification, load testing to 150% design limit

Procurement Evaluation Criteria

A practical evidence checklist for RFQ preparation and supplier evaluation.

Technical documentation

Request current drawings, revision history, and a signed specification sheet.

Manufacturing capability

Verify equipment lists, process limits, capacity, and representative production evidence.

Inspection readiness

Confirm test methods, calibrated equipment, sampling plans, and traceable reports.

Supplier transparency

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CNFX does not score or rank suppliers. Buyers must verify all claims and documents with the legal manufacturer before ordering.

Manufacturers of Rib

Manufacturer profiles associated with Rib.

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Compiled and source-reviewed by the CNFX editorial team. Each manufacturer above links to the page on that company's own website where the product is listed, with the date we checked it. How we source and review

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Frequently Asked Questions

What is the primary function of ribs in aircraft wings?

Ribs maintain the wing's airfoil shape, prevent skin buckling under aerodynamic loads, and transfer loads from the skin to the spars while providing attachment points for control surfaces and systems.

How do engineers determine optimal rib spacing?

Rib spacing is calculated using panel buckling analysis, considering skin thickness, material properties, and maximum expected loads. Typical spacing ranges from 150-400mm based on aircraft size and performance requirements.

What materials are commonly used for modern aerospace ribs?

Traditional aluminum alloys (7075, 2024 series) remain common, while advanced aircraft increasingly use carbon fiber composites for weight reduction and titanium alloys for high-temperature applications near engines.

Data Basis

Editorial classification, named public sources where available, and source-reviewed manufacturer records. See the editorial policy.

Preliminary Technical Classification

This page supports structured research, RFQ preparation, and supplier evaluation. It does not replace buyer-led supplier qualification, standards review, or technical approval.

Rib