Triangular Fold Pre-Preg Composite Bat Barrel
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Solution Overview
Problem
Traditional composite bat materials face limitations in flexibility and durability due to the restricted movement of fibers upon impact, which affects the bat's performance and longevity.
Innovation Solution
A composite bat barrel featuring a pre-preg layer with repetitive triangle folds, made from pre-impregnated fibers and a partially cured polymer matrix, allows for increased fiber movement and flexibility by uncoupling the resin from the fibers upon impact, enhancing the bat's durability and performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional composite materials are used with standard fiber arrangement, then the bat structure is simple and easy to manufacture, but the fibers have restricted movement upon impact reducing durability and performance
Solution Approach 1:
The pre-preg layer is segmented into multiple triangular folds rather than using a continuous flat structure. Each triangle fold creates independent movement zones that allow fibers to flex separately upon impact, distributing stress and improving durability without requiring complete structural redesign
Solution Approach 2:
The fiber arrangement transitions from a two-dimensional flat plane to a three-dimensional folded structure. The triangular folds create additional spatial dimensions that enable fiber movement and deformation in multiple directions during impact, enhancing energy absorption and durability
2Strength
If the pre-preg layer is made rigid for strength, then the bat can withstand impact forces, but the fibers cannot flex or move reducing performance and increasing brittleness
Solution Approach 1:
The pre-preg layer transitions from a static rigid structure to a dynamic folded structure. The triangular folds enable the material to adapt its stiffness during impact - rigid during normal use but flexible during ball contact, allowing fibers to move and absorb energy while maintaining overall structural strength
Solution Approach 2:
The local mechanical parameters of the pre-preg layer are changed through folding. The triangular geometry creates zones of varying stiffness - the fold creases act as hinges with lower stiffness while the triangle faces maintain higher stiffness, enabling simultaneous strength and flexibility
3Strength
If the resin is fully cured to maximize bond strength, then the composite structure is stable, but the fibers cannot uncouple from resin upon impact reducing energy absorption
Solution Approach 1:
The triangular fold structure预先 creates cushioning zones that allow controlled resin-fiber uncoupling during impact. The folded geometry anticipates impact forces and provides predetermined deformation paths, enabling energy absorption through progressive uncoupling rather than sudden failure
Solution Approach 2:
The resin-fiber interface undergoes a phase transition from bonded to uncoupled state during impact. The triangular folds facilitate this transition by creating stress concentration zones that initiate controlled debonding, allowing the resin to detach from fibers progressively and absorb impact energy
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 significantly increases the bat's durability and performance by enabling the fibers to flex and move more freely upon impact, improving the bat's ability to absorb and distribute the force of a ball, leading to enhanced durability and performance.
Implementation Method 1
The solution significantly increases the bat's durability and performance by enabling the fibers to flex and move more freely upon impact
Data Source
AI summary
A composite barrel layer for a bat including a fiber pre-preg layer with repetitive folds generally forming part triangle shapes incorporated into a fiber reinforced composite layer of the barrel portion of the bat.