Ballistic Shield Offset Layers for Projectile Dissipation
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Solution Overview
Problem
Existing ballistic shields are ineffective in stopping projectiles during the initial phase of impact, leading to layer delamination and reduced effectiveness in close-range shots, as they are prone to being pierced rather than separated, which compromises the integrity of the shield.
Innovation Solution
A multi-piece ballistic shield design featuring a primary shield and secondary offset layers with air gaps, where the secondary layers are mechanically coupled to the primary shield to absorb and deflect projectiles, reducing the threat to the primary shield by dissipating kinetic energy and preventing delamination, thus enhancing shot spacing and reducing the risk of layer separation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If traditional single-layer ballistic shields are used, then the shield structure is simple and easy to manufacture, but the shield is prone to being pierced by projectiles and layers delaminate during impact
Solution Approach 1:
The ballistic shield is divided into multiple independent layers (first layer, second layer, third layer) with air gaps between them. Each layer can independently absorb and dissipate projectile energy through molecular and mechanical bond breaking, preventing the entire shield from failing at once. This segmentation allows the shield to stop projectiles more effectively while maintaining a relatively simple overall structure.
Solution Approach 2:
The shield uses composite construction with multiple layers of different materials optimized for specific functions: the first layer uses high-strength fibers for initial projectile engagement, the second layer provides additional ballistic resistance, and the third layer offers rearward protection. This composite approach enhances overall ballistic performance without requiring each individual layer to be overly complex.
2Reliability
If multi-layer ballistic shields with offset components and air gaps are used, then projectile stopping effectiveness is improved and shot spacing is reduced, but the shield design becomes more complex
Solution Approach 1:
The shield incorporates air gaps between layers, adding a spatial dimension to the design. These gaps allow projectile fragments and deformed layers to be contained between layers rather than causing immediate failure. The offset positioning of layers in different dimensions enables each layer to engage projectiles at slightly different positions, improving reliability while the modular design keeps construction manageable.
Solution Approach 2:
The air gaps between layers act as pre-positioned cushioning spaces that absorb projectile energy before it can penetrate through all layers. The offset layers are positioned in advance to intercept projectiles at different depths, providing progressive energy dissipation. This beforehand cushioning improves reliability by preventing catastrophic failure while the modular offset design makes assembly straightforward.
3Stability of the object's composition
If layers are mechanically coupled without air gaps, then structural integrity is maintained, but weight and thickness increase
Solution Approach 1:
The shield uses thin mechanical coupling elements (fasteners, adhesives, or flexible connectors) to bond the layers together. These thin coupling mechanisms provide sufficient structural integrity to maintain layer alignment and prevent delamination during normal use, while occupying minimal space and adding negligible weight. The air gaps are maintained despite the thin coupling, preserving weight benefits while ensuring stability.
4Strength
If offset layers are used to absorb and deflect projectiles, then kinetic energy is dissipated and delamination is prevented, but manufacturing precision requirements increase
Solution Approach 1:
The shield is segmented into modular layers that can be manufactured separately with standard tolerances and then assembled. Each layer's offset positioning is designed to be achievable with conventional manufacturing precision, and the modular nature allows for easier quality control. The segmentation enables energy dissipation through controlled delamination between layers rather than requiring ultra-precise single-layer construction.
Solution Approach 2:
The offset layers are positioned with sufficient spacing to ensure that even with normal manufacturing variations, the projectile will engage multiple layers. The offset distance is designed to be larger than the maximum expected positioning error, ensuring that the energy dissipation function is maintained without requiring excessive manufacturing precision. This partial action approach provides a tolerance buffer that simplifies manufacturing.
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 multi-piece design effectively stops projectiles by dissipating kinetic energy through molecular and mechanical bond breaking, reducing the risk of primary shield damage and allowing closer shot spacing, while the air gaps minimize weight and thickness while maintaining performance.
Implementation Method 1
absorb and deflect projectiles, reducing the threat to the primary shield by dissipating kinetic energy
Implementation Method 2
stops projectiles by dissipating kinetic energy through molecular and mechanical bond breaking
Implementation Method 3
stops projectiles by dissipating kinetic energy through molecular and mechanical bond breaking
Implementation Method 4
the air gaps minimize weight and thickness while maintaining performance
Data Source
AI summary
A system is provided with a multi-piece ballistic shield having a primary shield with an outward face exposed to projectiles and an opposing inward face. A first offset layer is mechanically coupled to a first section of the outward face of the primary shield and a second offset layer that is mechanically coupled to a second section of the outward face of the primary shield. The multi-piece ballistic shield further includes a secondary shield that is mechanically coupled to the first offset layer and the second offset layer. The system includes a first handle mechanism mechanically coupled to the inward face and having a fastener secured thereto. The system further includes a harness coupled to the fastener and to a vest shoulder strap to support a weight of the multi-piece ballistic shield.