Ceramic Armor Layering for Debris Confinement and Trauma Reduction
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Solution Overview
Problem
Existing armors are either too heavy, bulky, expensive, or insufficient in protecting against large caliber projectiles, and they often cause tissue damage due to deformation upon impact.
Innovation Solution
A lightweight, thin armor design featuring a ceramic layer backed by a thin, high-strength metallic layer and a ballistic composite layer, with an additional metallic layer for enhanced protection and reduced deformation, using a sequence of layers bonded together with an adhesive to minimize impact and debris dispersion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional soft armor made of flexible fabric or non-woven textile layers is used, then the armor provides basic protection, but it causes tissue damage due to deformation upon impact
Solution Approach 1:
The armor is divided into multiple functional layers: a front ceramic layer for projectile deflection, a middle metallic layer for impact load distribution, and a back ballistic composite layer for stopping residual threats. This segmentation allows each layer to perform its specific function optimally, preventing deformation at the back surface while maintaining protection effectiveness.
Solution Approach 2:
The armor uses a composite structure combining ceramic materials (for hardness and projectile deflection), metallic materials (for ductility and impact distribution), and ballistic composite materials (for energy absorption). This composite approach provides comprehensive protection against both projectile impact and deformation-induced tissue damage.
2Reliability
If ceramic armor is used to protect against large caliber projectiles, then protection against high energy impacts is improved, but the armor becomes much too heavy and bulky
Solution Approach 1:
Each layer is optimized for its specific function with appropriate material properties: the front ceramic layer uses hard, brittle materials for projectile deflection; the middle metallic layer uses high-strength, ductile materials for impact distribution; the back ballistic composite layer uses energy-absorbing materials for stopping residual threats. This local optimization reduces overall weight while maintaining protection effectiveness.
Solution Approach 2:
The multi-layer composite structure combines materials with different density and strength characteristics, allowing the armor to achieve high protection levels against large caliber projectiles without requiring excessive weight. The ceramic-metallic-composite combination provides superior protection-to-weight ratio compared to traditional single-material armors.
3Reliability
If traditional multi-layer ceramic armor with polymer-fiber composite or additional ceramic components is used, then protection is improved, but the armor becomes too expensive
Solution Approach 1:
The armor design optimizes the thickness and material composition of each layer to achieve the required protection levels at minimum cost. By carefully selecting the ceramic-metallic-composite combination and adjusting layer parameters, the design provides effective protection against large caliber projects while controlling manufacturing costs compared to traditional all-ceramic or polymer-fiber composite armors.
4Strength
If a thin metallic layer is used to back the ceramic layer, then impact load distribution and debris confinement are improved, but the armor weight increases
Solution Approach 1:
The metallic layer is positioned specifically at the interface between the ceramic front layer and the ballistic composite back layer, where it provides maximum functional benefit for impact distribution and debris confinement. This localized placement optimizes the weight-strength ratio by concentrating metallic material only where it is most needed for structural support.
Solution Approach 2:
The thin metallic layer is integrated into the ceramic-metallic-composite structure, providing high-strength impact distribution capability while minimizing weight penalty. The metallic layer's high strength-to-weight ratio allows it to effectively distribute impact loads and confine debris without significantly increasing overall armor weight.
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 armor effectively reduces deformation and trauma from large caliber projectiles, achieving survivable impact levels as per NIJ standards with minimal weight penalty, allowing for the use of lower-cost ceramics and improved ballistic performance.
Implementation Method 1
backed by a first nonporous solid metallic layer of high strength and ductility for distributing an impact load from a projectile and ceramic debris
Implementation Method 2
for confining the debris in an impact zone within said ceramic layer
Implementation Method 3
with the various layers being bonded together by a suitable adhesive
Implementation Method 4
exhibiting a back face deformation of 44 mm or less in clay as measured in accordance with a National Institute of Justice (NIJ) Standard when impacted on a front surface of said ceramic layer by projectile threats
Data Source
AI summary
An armor for protection against large caliber projectiles has a ceramic layer with a confinement layer on a front thereof. The ceramic layer is backed by a first metallic layer and the first metallic layer in turn is backed by a composite layer. The composite layer is backed by a second metallic layer, which in turn is backed by an anti-trauma layer. The armor is used to protect personnel, but it can also be used to protect objectives such as vehicles.