Composite Reinforcement Wire for Lightweight Tire Stiffness
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Solution Overview
Problem
The extensive use of steel cords and wires in tires results in high weight, which increases rolling resistance and fuel consumption, necessitating a reinforcement material that reduces steel content while maintaining compression resistance and flexural stiffness.
Innovation Solution
A composite wire comprising a thermoplastic monofilament core with a sheath of reinforcement threads forming angles such that their overall sum is essentially zero, utilizing materials from biological or recycling sources, providing a lightweight alternative with embedded reinforcement fibers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If steel cords and wires are used for reinforcement in tires, then compression resistance and flexural stiffness are improved, but weight increases
Solution Approach 1:
The patent applies composite materials by combining a thermoplastic monofilament core with multiple groups of reinforcement threads wrapped around it. The reinforcement threads are made from biological or recycled sources, creating a composite structure that achieves the required compression resistance and flexural stiffness while reducing weight compared to traditional steel cords.
Solution Approach 2:
The patent changes the material parameters by replacing steel with thermoplastic materials and biological/recycled fibers. It also optimizes the geometric parameters by wrapping reinforcement threads at specific angles where the overall sum of all angles is essentially zero, thereby achieving mechanical performance comparable to steel with reduced weight.
2Strength
If steel cords and wires are used for reinforcement in tires, then flexural stiffness is improved, but weight increases
Solution Approach 1:
The composite structure combines a thermoplastic monofilament core providing baseline stiffness with multiple groups of reinforcement threads wrapped at optimized angles. This composite architecture delivers the required flexural stiffness while using lighter materials than steel, thereby reducing overall weight.
Solution Approach 2:
The patent optimizes the geometric arrangement of reinforcement threads by controlling their wrapping angles around the core. The condition that the overall sum of all angles is essentially zero creates a balanced structural configuration that maximizes flexural stiffness while minimizing material usage and weight.
3Weight of moving object
If steel content is reduced in tires, then weight decreases and fuel efficiency improves, but compression resistance and flexural stiffness must be maintained
Solution Approach 1:
The patent uses composite materials consisting of a thermoplastic monofilament core reinforced with multiple groups of threads from biological or recycled sources. This composite construction maintains the necessary compression resistance while enabling reduced steel content and lower weight in tire applications.
Solution Approach 2:
The patent changes the material composition parameters by substituting steel with thermoplastic and biological/recycled fiber composites. Simultaneously, it optimizes the structural parameters through controlled wrapping angles of reinforcement threads to ensure compression resistance is maintained despite reduced steel content.
4Loss of energy
If steel content is reduced in tires, then rolling resistance improves, but compression resistance and flexural stiffness must be maintained
Solution Approach 1:
The composite wire structure using thermoplastic core with biological/recycled fiber reinforcement provides the necessary mechanical strength to maintain compression resistance while reducing rolling resistance. The lighter composite structure reduces energy losses associated with steel content, improving overall tire efficiency.
Solution Approach 2:
The patent optimizes the geometric parameters of the reinforcement threads (wrapping angles summing to essentially zero) to ensure that compression resistance is maintained even as steel content is reduced. This parameter optimization allows rolling resistance to improve while preserving the required mechanical performance.
Data Source
AI summary
A composite wire has a thermoplastic core component and a sheath. The sheath includes at least two groups of reinforcement threads wrapped around the core component. The at least two groups of reinforcement threads form angles with the core component, with the overall sum of all angles which are essentially zero.