Honeycomb Shear Layer Design for Tire Stiffness Control
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Solution Overview
Problem
Conventional geometric parameters for honeycombs are difficult to control for target shear stiffness and shear flexibility due to their coupling, making it challenging to design materials that mimic elastomeric properties while reducing energy loss under shear for applications like tire shear layers.
Innovation Solution
Introducing new parameters, effective height (R) and horizontal separation (d), which allow independent control of shear stiffness and shear flexibility, enabling the design of honeycomb structures with specific mechanical properties for applications requiring both shear stiffness and flexibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If conventional geometric parameters (cell height, cell length, cell angle) are used to design honeycombs, then the structure can achieve certain mechanical properties, but it is difficult to independently control both shear stiffness and shear flexibility due to parameter coupling
Solution Approach 1:
The patent transforms the conventional geometric parameters (cell height h, cell length l, cell angle θ) into a new parameterization system with effective height R and horizontal separation d. This parameter transformation decouples the control of shear stiffness and shear flexibility, allowing independent optimization of each property. The new parameters R and d are derived from the conventional parameters through specific mathematical relationships, enabling designers to adjust shear stiffness and shear flexibility separately without the coupling constraints of the original parameter system.
2Loss of energy
If honeycomb structures are designed to mimic elastomeric properties with high shear flexibility, then energy loss under shear is reduced, but achieving target shear stiffness becomes difficult
Solution Approach 1:
By introducing the new parameterization system with effective height R and horizontal separation d, the patent enables independent control of shear flexibility (affecting energy loss) and shear stiffness. Designers can now optimize R to minimize energy loss under shear while separately adjusting d to achieve the desired shear stiffness, resolving the trade-off between these two properties that existed in the conventional parameter system.
3Manufacturing precision
If conventional honeycomb parameters are used, then design process is simple, but achieving specific target properties (shear modulus 4-4.5 MPa, shear strain 10%) simultaneously is challenging
Solution Approach 1:
The patent introduces a new parameterization system that directly links geometric parameters to target mechanical properties. The effective height R and horizontal separation d provide a more direct control mechanism for achieving specific shear modulus (4-4.5 MPa) and shear strain (10%) targets. While the parameter transformation adds initial complexity, it simplifies the iterative design process by reducing parameter coupling and enabling independent optimization of each target property.
Data Source
AI summary
A design method for optimizing the shear layer of a shear band for use in a tire is provided. The shear layer has a honeycomb configuration and the design method optimizes the dimensions of the honeycomb.