Antiballistic Panel with Segmented Fiber Stacks
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Solution Overview
Problem
Existing antiballistic panels combine different fiber types in a single layer or laminate, which can diminish the positive effects of individual fibers, rather than enhancing their properties when used separately.
Innovation Solution
An antiballistic panel comprising two distinct stacks, where one stack consists only of fibers with a specific tensile modulus range (40-85 GPa) and the other stack consists only of fibers with a higher tensile modulus range (86-140 GPa), each stack being made up of laminates with unidirectional or woven fiber layers impregnated with a matrix material, to maintain and enhance the unique properties of each fiber type.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If different fiber types are combined in one layer or laminate, then the panel structure is simplified and manufacturing is easier, but the positive effects of individual fiber types are overlapped and diminished
Solution Approach 1:
The panel is divided into multiple stacks, with each stack containing only one type of fiber (either high tensile modulus or low tensile modulus). This segmentation prevents the overlap and diminishment of fiber properties while maintaining a relatively simple manufacturing process. Each stack is manufactured separately with uniform fiber composition, then assembled into the final panel structure.
Solution Approach 2:
Different regions of the panel (different stacks) are assigned different fiber types based on their specific functional requirements. High tensile modulus fibers are used in stacks requiring stiffness and dimensional stability, while low tensile modulus fibers are used in stacks requiring energy absorption and flexibility. This local differentiation optimizes antiballistic performance without complicating the overall manufacturing approach.
2Device complexity
If different fiber types are used in mixed stacks, then the panel structure is simpler, but the unique properties of each fiber type are lost
Solution Approach 1:
The panel structure is segmented into multiple stacks, where each stack is dedicated to a single fiber type. This segmentation preserves the unique properties of each fiber type (high tensile modulus for stiffness, low tensile modulus for energy absorption) while maintaining a relatively simple overall panel structure. The segmentation allows for clear functional differentiation without complex mixed-fiber arrangements.
Solution Approach 2:
Instead of mixing different fiber types within each stack (the conventional approach), the invention inverts the approach by creating separate stacks for each fiber type. This inversion allows each fiber type to maintain its unique properties while still achieving a integrated panel structure through the assembly of multiple homogeneous stacks.
3Reliability
If separate stacks of different fiber types are used, then antiballistic performance is improved, but the panel structure becomes more complex
Solution Approach 1:
The panel is segmented into multiple stacks with each stack containing a specific fiber type. This segmentation improves antiballistic performance by allowing each fiber type to perform its optimal function without property overlap. The complexity is managed by organizing these segmented stacks in a systematic arrangement that maintains structural coherence.
Solution Approach 2:
The multi-stack structure serves multiple functions simultaneously: high tensile modulus stacks provide stiffness and structural integrity, while low tensile modulus stacks provide energy absorption and impact resistance. This multi-functionality is achieved through a unified panel structure that integrates different fiber type stacks, allowing the single panel to perform multiple protective functions.
Data Source
AI summary
An antiballistic panel includes at least a first stack and a second stack. The first stack has a plurality of first laminates made of a first kind of fibers, and the second stack has a plurality of second laminates made of a second kind of fibers. Either the first kind of fibers or the second kind of fibers has a tensile modulus in the range of 40-85 GPa measured according to ASTM D7269. The other of the first kind of fibers or the second kind of fibers has a tensile modulus in the range of 86-140 GPa measured according to ASTM D7269.