Variable-Viscosity Footwear Support Members for Adaptive Cushioning
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Solution Overview
Problem
Existing footwear technologies lack adaptive support systems that can dynamically adjust to varying ground conditions and user movements, providing optimal shock absorption, energy return, and stability.
Innovation Solution
Incorporation of support members filled with rheological fluids whose viscosity is controlled by electromagnetic devices, allowing for variable compressibility and responsiveness to changing conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If support members are made with fixed compressibility material, then manufacturing is simple, but adaptability to different terrains and movements is poor
Solution Approach 1:
The support member incorporates a variable viscosity fluid within a sealed chamber, allowing the material properties to change dynamically in response to applied stress. As compression force increases, the fluid viscosity increases, providing progressive resistance that adapts to different movement intensities and terrain conditions without requiring complex mechanical structures
Solution Approach 2:
The fluid's viscosity parameter changes in response to shear rate or stress, transforming the support member from a static structure to an adaptive system. This parameter change allows the same support member to provide different levels of cushioning and support depending on the magnitude and rate of applied forces, enhancing versatility without increasing structural complexity
2Adaptability or versatility
If support members use variable viscosity fluid, then adaptability improves, but device complexity increases
Solution Approach 1:
The variable viscosity fluid automatically adjusts its properties in response to applied stress without requiring external control systems, sensors, or power sources. The fluid's rheological characteristics change self-regulatingly based on the shear rate or stress applied, providing dynamic adaptability while minimizing system complexity
Solution Approach 2:
The support member utilizes a sealed hydraulic chamber containing the variable viscosity fluid, leveraging fluid mechanics principles to provide smooth, continuous adjustment of support characteristics. The hydraulic enclosure allows the fluid to respond uniformly to compression forces while maintaining a simple, integrated structure
3Object-affected harmful factors
If support members are made compressible, then shock absorption improves, but stability during static support deteriorates
Solution Approach 1:
The variable viscosity fluid provides dynamic resistance that adapts to the rate of compression. During impact or shock events, the fluid's viscosity increases in response to high shear rates, providing enhanced shock absorption. During static support conditions, the fluid maintains lower viscosity, allowing the support member to remain stable and responsive without excessive softness
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
Enhances footwear stability and comfort by adaptively adjusting to different terrains and movements, improving shock absorption and energy return.
Implementation Method 1
a first electromagnetic device associated with the first support member, where the first electromagnetic device can be activated to vary the viscosity of the rheological fluid in the first inner portion
Data Source
AI summary
An article of footwear including an adaptive support system includes a plurality of support members. Each support member includes an outer chamber and an inner chamber, the inner chamber being filled with a magnetorheological fluid. An electromagnet is disposed adjacent to the inner chamber and can be used to vary the viscosity of the magnetorheological fluid.