Shoe Sole Stress Distribution via Segmented Edge Design
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Sports shoes fail to balance performance characteristics such as wear resistance, adhesion, and sliding capabilities effectively for top-level players, leading to uneven stress distribution and increased wear, particularly due to varying demands of different sports and surfaces.
Innovation Solution
A flexible, elastically deformable sole with an alternating arrangement of solid areas and recesses, designed to minimize stress differences across the sole, with specific distributions and orientations of cells and edges to promote adhesion, sliding, and controlled pressure distribution, optimizing grip and wear resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Duration of action of stationary object
If a compact continuous edge is used around the sole periphery to increase wear resistance, then wear resistance is improved, but adhesion and sliding capabilities deteriorate
Solution Approach 1:
The sole is divided into multiple functional zones with different edge configurations: the peripheral zone has a compact continuous edge for wear resistance, while the central grooved area has interrupted edges for adhesion. This segmentation allows each zone to optimize its specific function without compromising the other.
Solution Approach 2:
Different regions of the sole are given different edge characteristics tailored to their specific functions. The peripheral area uses a continuous edge for durability, while the central area uses interrupted edges to create gripping elements for adhesion and controlled sliding in specific directions.
2Ease of operation
If sculpted patterns with sharp edges are created to increase adhesion, then adhesion is improved, but stress distribution becomes uneven and wear increases
Solution Approach 1:
The sole design creates localized gripping elements through interrupted edges in the central grooved area, providing sharp edges only where adhesion is needed, while maintaining a compact continuous edge in the peripheral area for wear resistance. This local differentiation resolves the contradiction between adhesion and wear resistance.
3Ease of manufacture
If a uniform sole design is used for all sports and surfaces, then manufacturing is simplified, but performance adapts poorly to specific sport requirements
Solution Approach 1:
The sole is segmented into distinct functional zones (peripheral compact edge zone and central grooved zone) that can be manufactured as integrated features in a single sole piece, maintaining manufacturing simplicity while providing sport-specific performance characteristics through the differentiated edge configurations.
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 improved adhesion and wear resistance by evenly distributing dynamic stresses, reducing pressure peaks, and enhancing sliding capabilities, leading to better performance and longer shoe life for top-level athletes.
Implementation Method 1
A flexible, elastically deformable sole with an alternating arrangement of solid areas and recesses, designed to minimize stress differences across the sole
Implementation Method 2
manufacturers have traditionally made use of sculpted patterns formed by the alternation of solid areas and recesses on the surface of the sole, usually with the aim of creating in this way sharp edges which can increase the ease of adhesion of the sole to the playing surface
Data Source
AI summary
According to one aspect, the shoe sole (10) comprises at least one main ground engagement section (22) specifically designed to respond to certain modes of solicitation by the foot of the player. Such section is provided with a sculpted pattern having recesses (102) and solid areas (100). The recesses and solid areas are distributed to minimize pressures or stress differences throughout the ground engagement section concerned so as to provide better adherence and lower wear by abrasion in response to such mode of solicitations. Preferably this arrangement is applied to more than one main ground engagement section (22, 24, 42, 44) in the shoe sole, each of which offers a specific response to a particular mode of solicitation by a player in action. According to a preferred embodiment the recesses are made of elongated cells opening (102) in a corresponding solid area through an elongated aperture (101) with rounded ends (108). The application of these principles to the production of a tennis shoe is described.