Fatigue Assessment of a Formula Racing Wheel Hub Under Torsional Loading

A lightweight wheel hub for a formula racing vehicle was under development, requiring detailed assessment of its fatigue performance under repeated torsional loading. As a safety-critical drivetrain component, understanding its durability and identifying potential fatigue failure locations was essential to ensure reliable performance throughout its service life.

Finite element fatigue analysis was employed to evaluate the structural response to cyclic loading, predict fatigue life, and support design validation prior to manufacture.

Challenge

Wheel hubs in high-performance motorsport applications are subjected to repeated torque transmission, braking loads, and dynamic operating conditions. While a design may satisfy static strength requirements, cyclic loading can result in fatigue damage that ultimately governs component life.

The objective was to:

Evaluate the fatigue performance of the wheel hub under torsional loading
Identify critical stress concentration regions susceptible to fatigue damage
Predict component durability under repeated load cycles
Assess the influence of the hub geometry on fatigue life
Provide engineering insight to support design refinement and validation

Solution

A detailed finite element model of the wheel hub was developed to simulate the structural response under representative torsional loading conditions. The analysis evaluated the resulting stress distribution and identified locations where cyclic loading could initiate fatigue failure.

The analysis:

Simulated torsional loading representative of operational conditions
Evaluated stress distribution throughout the wheel hub
Identified critical stress concentration regions
Predicted fatigue life under cyclic loading
Assessed the structural suitability of the design for its intended application
Provided engineering recommendations to improve durability where required

The results provided a comprehensive understanding of the component's fatigue behaviour, enabling informed engineering decisions before physical testing and manufacture.

Outcome

The study provided a validated engineering assessment of the wheel hub's durability and supported key design decisions by:

Validating the structural integrity of the hub under cyclic torsional loading
Identifying critical fatigue locations prior to manufacture
Improving confidence in component reliability and service life
Reducing the risk of premature fatigue failure during operation
Supporting design optimisation while maintaining lightweight performance

Testimonial

“The fatigue assessment provided valuable insight into the durability of our wheel hub design and highlighted critical areas for refinement before manufacture. The analysis gave us confidence in the component's performance while reducing development time and the need for multiple design iterations.”

— Vehicle Dynamics & Structures Engineer