Composite Vehicle Wheel Metallic Insert Thermal Expansion
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Solution Overview
Problem
Existing composite material wheels for vehicles face aesthetic and technical challenges, including the need for a flat central surface for clamping, which restricts design flexibility and increases the risk of mechanical play and instability due to different thermal expansions of materials under high-temperature conditions.
Innovation Solution
A composite material wheel with a metallic insert at its central region, coupled between external laminated shells and an interface film, allowing direct hub attachment without dedicated tightening plates, and featuring a radially tapered tab for thermal expansion management and corrosion protection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a flat central surface is used for clamping between tightening discs, then the wheel can be securely locked in place, but the wheel's aesthetic appearance and design flexibility are compromised
Solution Approach 1:
The wheel is divided into two functional zones: a flat central clamping surface for secure mounting and an outer aesthetic region with free-form design. This segmentation allows the wheel to simultaneously achieve reliable locking through the flat surface and maintain aesthetic appearance through the contoured outer shell.
Solution Approach 2:
The flat surface is applied locally only where required for clamping (central region), while the rest of the wheel maintains its aesthetic contoured design. This local application of flat surface geometry resolves the contradiction by providing the necessary functional property only where needed without compromising overall appearance.
2Strength
If different materials (carbon fiber, metal, ceramic) are used in the wheel assembly, then mechanical properties can be optimized, but differential thermal expansion causes instability under high temperature
Solution Approach 1:
The flat central surface is designed with specific dimensional parameters and material selection to control thermal expansion behavior. By optimizing the thickness, material composition, and geometric parameters of the flat surface, the design accommodates thermal expansion differences between materials while maintaining overall dimensional stability under high temperature conditions.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution provides a composite material wheel that is aesthetically flexible, mechanically stable, and resistant to high-temperature conditions, ensuring safety and practical implementation while maintaining low costs.
Implementation Method 1
under conditions of intense heating, the hub, the tightening discs and the central part of the wheel made of carbon will be subjected to different thermal expansions owing to the fact that they are made of mutually different materials
Implementation Method 2
following numerous operations to brake the vehicle, the disk of the brake will be subjected to exceptionally intense heating which will be transmitted to the wheel
Data Source
AI summary
A wheel for supporting tires for vehicles which is made of composite material based on carbon fiber, which includes an insert which is made of metallic material at its central region configured to be fixed to the hub of the respective vehicle. The insert is coupled between external contoured laminated shells made of composite material, with the interposition of at least one interface film having a thickness that can vary between 0.05 mm and 1.0 mm.The interface film is made of a material preferably chosen from among epoxy polymers, polyurethane polymers, acrylic polymers, silicone polymers, polyamide polymers, glass fibers, and combinations thereof.