Auxetic Midsole Configuration for Dynamic Footwear Cushioning
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Solution Overview
Problem
Conventional footwear sole structures lack efficient cushioning and traction, particularly in dynamic motions, due to the limitations of traditional midsole and insole configurations.
Innovation Solution
A sole structure comprising a midsole component with an auxetic configuration, featuring a plurality of holes arranged in an auxetic pattern, and an inner sole component with different densities, which provides enhanced cushioning and adaptability during dynamic activities by allowing expansion and contraction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If traditional midsole and insole configurations are used, then the structure is simple and easy to manufacture, but cushioning and shock absorption performance are insufficient
Solution Approach 1:
The sole structure is divided into multiple components including a midsole component with auxetic configuration, an inner sole component with different density, and an outer sole member. This segmentation allows each component to contribute specific functions (cushioning, support, traction) while collectively achieving superior overall performance that cannot be obtained with a single traditional sole structure.
Solution Approach 2:
The patent employs composite material construction with the midsole component featuring auxetic configuration (negative Poisson's ratio), the inner sole component with different density, and the outer sole member with traction features. This combination of materials with different properties enables simultaneous achievement of cushioning, shock absorption, and structural integrity.
2Adaptability or versatility
If traditional sole structures are used, then manufacturing is straightforward, but adaptability to dynamic motions and ground contact is poor
Solution Approach 1:
The midsole component is designed with auxetic configuration that enables dynamic adaptation during motion. The negative Poisson's ratio material properties allow the sole to expand in directions perpendicular to applied force, providing adaptive cushioning and support that responds to dynamic loading conditions during ambulatory activities.
Solution Approach 2:
Different regions of the sole structure have specialized properties: the midsole component provides auxetic cushioning, the inner sole component with different density provides structural support, and the outer sole member provides traction. This local differentiation of properties optimizes performance for specific functions while maintaining overall manufacturability.
3Strength
If conventional midsole and insole configurations are used, then the structure is straightforward, but shock absorption capability is limited
Solution Approach 1:
The midsole component with auxetic configuration is designed to provide cushioning before impact forces are fully transmitted to the foot. The negative Poisson's ratio properties enable the material to expand and absorb energy proactively during the compression phase of impact, enhancing shock absorption capability.
Solution Approach 2:
The combination of auxetic midsole component, dense inner sole component, and outer sole member creates a composite structure where each layer contributes to shock absorption through different mechanisms, achieving superior overall shock absorption that cannot be obtained with conventional single-material soles.
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 auxetic midsole and inner sole configuration enhances cushioning, shock absorption, and traction, providing improved comfort and performance in various ambulatory activities by adapting to ground contact and foot movements.
Implementation Method 1
The midsole component includes a plurality of holes arranged in an auxetic configuration
Data Source
AI summary
An article of footwear includes a sole structure with a midsole component and an inner sole component. The midsole component includes holes arranged in an auxetic configuration. The midsole component and the inner sole component may have a different density. The midsole component and the inner sole component may have a different compressibility.