Composite Diving Board Stiffness and Lift via Sandwich Structure
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Solution Overview
Problem
Conventional aluminum alloy diving boards used in competitive diving lack alternatives in manufacturing methods and performance characteristics, limiting the ability to achieve maximum lift and maneuverability for divers.
Innovation Solution
A composite diving board design featuring a sandwich composite structure with carbon fiber laminates and a central core made from materials like polyurethane foam or wood, providing improved stiffness and lift by accelerating from deflection more rapidly than traditional boards.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If conventional aluminum alloy boards are used, then manufacturing simplicity is maintained, but performance characteristics and lift capability are limited
Solution Approach 1:
The patent applies composite materials by constructing the diving board as a sandwich structure with fiber-reinforced plastic laminates (carbon fiber, glass fiber, or aramid fiber) embedded in a resin matrix, with a foam core (polyurethane, polyvinyl chloride, polyethylene, or polystyrene) between the laminates. This composite construction provides superior stiffness, strength, and lift capability compared to conventional aluminum alloy boards while maintaining manufacturing feasibility through established composite fabrication processes.
2Strength
If board thickness is increased to improve stiffness, then lift capability improves, but board weight increases
Solution Approach 1:
The fiber-reinforced plastic laminates provide exceptional stiffness-to-weight ratio, allowing the board to achieve required stiffness with reduced thickness and weight compared to aluminum alloy boards. The foam core adds minimal weight while contributing to overall structural rigidity and buoyancy.
Solution Approach 2:
The sandwich structure concentrates material where needed: the fiber-reinforced laminates are positioned at the top and bottom surfaces where bending stresses are highest, while the lightweight foam core fills the intermediate space. This local optimization of material placement maximizes stiffness while minimizing weight.
3Ease of operation
If the board responds more fully to diver motions, then lift is maximized, but board stability may be compromised
Solution Approach 1:
The composite sandwich structure is designed with specific fiber orientations and laminate configurations that allow the board to be dynamically responsive to diver loading while maintaining structural stability. The foam core provides damping characteristics that control vibration and rebound, enabling the board to respond fully to diver motions without compromising stability.
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 composite diving board offers enhanced performance by achieving greater lift and allowing more intricate maneuvers due to its increased stiffness and stability, outperforming conventional aluminum alloy boards.
Implementation Method 1
Immediately prior to take off is the point at which the tip of the board flexes farthest down and then rebounds upwardly to propel the diver from the board
Implementation Method 2
a composite diving board comprising a composite laminate of fibers in a matrix
Data Source
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AI summary
A composite diving board comprising a composite laminate of fibers in a matrix.