Ski Core Lamellae Stiffness Distribution for Edge Grip
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Solution Overview
Problem
Current gliding boards, such as skis, face challenges in control behavior and damping due to suboptimal elastic properties of their core materials, which affect dynamic behavior during the swing phase and edge grip.
Innovation Solution
A core structure composed of lamellae of varying lengths and materials, arranged in different zones along the gliding board to create areas of distinct stiffness, influencing deflection and pressure distribution for improved control and damping.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the core material has uniform elastic properties throughout, then the manufacturing process is simple, but the control behavior and damping during swing phase are suboptimal
Solution Approach 1:
The core is constructed with lamellae of different materials, lengths, and stiffness properties arranged in specific zones along the gliding board. This creates local variations in elastic properties, with stiffer lamellae in areas requiring stability and more flexible lamellae in areas requiring damping, thereby optimizing control behavior and swing phase performance without requiring a completely new structural approach
Solution Approach 2:
The core is divided into multiple discrete lamellae that can be individually selected and positioned. This segmentation allows each lamella to contribute differently to the overall mechanical properties, enabling precise control over the stiffness and damping characteristics in different regions of the gliding board while maintaining a modular construction approach
2Strength
If the core is made stiffer to improve edge grip, then edge grip improves, but the dynamic behavior during swing phase deteriorates
Solution Approach 1:
Stiffer lamellae are specifically positioned in the central area of the core where edge grip is critical, while more flexible lamellae are placed in the end areas to maintain dynamic behavior and damping during swing phase. This localized differentiation allows the core to provide both strong edge holding capability and flexible dynamic response
3Stability of the object's composition
If the core thickness is increased to improve stability, then static flexural rigidity improves, but the mass distribution and moment of inertia are adversely affected
Solution Approach 1:
The core uses a composite construction of multiple lamellae made from different materials with varying density and stiffness characteristics. This allows the optimization of flexural rigidity through material selection and arrangement rather than simply increasing overall core thickness, thereby controlling the mass distribution and moment of inertia to maintain desirable dynamic properties
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
This design enhances control behavior and damping by optimizing the core's mechanical properties, ensuring better edge grip and dynamic handling by varying the stiffness distribution across the gliding board's length.
Implementation Method 1
the design and structure of the core also has a major influence on the elastic recovery behavior and dynamic behavior of the sandwich composite
Implementation Method 2
The dynamic behavior of the ski is essentially influenced by the flexural vibration damping and torsional vibration damping
Data Source
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AI summary
The invention relates to a sliding board, in particular a ski, constructed from a substructure, a superstructure and a core arranged in between, which consists of different materials, wherein the core consists of lamellae of partially different lengths running parallel to each other in the longitudinal direction of the sliding board, wherein the lamellae are made of different materials and are connected to each other to form a block in such a way that areas of different stiffness result along the length of the sliding board.