Graded Polymer Barrier Shock Attenuation
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Solution Overview
Problem
Conventional munitions have fixed yields and effects, limiting adaptability to changing battlefield scenarios, leading to missed opportunities and unintended outcomes due to their inability to adjust to varying situations.
Innovation Solution
A spatially graded barrier with varying density across its thickness, composed of a polymer with hollow containers, is used to attenuate shock waves in explosive devices, allowing for variable yield and effect munitions by dissipating shock energy and preventing detonation of adjacent segments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If conventional fixed-yield munitions are used, then manufacturing and inventory management is simplified, but adaptability to varying battlefield scenarios is reduced
Solution Approach 1:
The munition is divided into multiple separable explosive segments that can be independently controlled. Each segment contains explosive material and can be detonated separately, allowing the system to adapt to different battlefield scenarios by selecting which segments to activate, thereby providing variable yield without requiring multiple different munition types.
Solution Approach 2:
The munition system transitions from a static fixed-yield design to a dynamic variable-yield system. The ability to selectively detonate different segments based on real-time battlefield conditions provides dynamic adaptability, where the explosive output can be adjusted during the mission based on changing requirements.
2Adaptability or versatility
If multiple munition sizes and types are used to address varying scenarios, then adaptability is improved, but manufacturing capacity and logistics complexity increase
Solution Approach 1:
A single munition design with multiple segments serves multiple functions that would traditionally require different munition types. By configuring different combinations of segments, the same basic munition platform can address various battlefield scenarios, eliminating the need for extensive inventories of specialized munitions and simplifying manufacturing requirements.
3Reliability
If partition walls with traditional shock attenuation materials are used, then detonation prevention between segments is achieved, but weight and volume increase
Solution Approach 1:
The partition walls incorporate porous or cellular structured materials that provide effective shock attenuation. These porous structures dissipate shock waves through controlled collapse and energy absorption mechanisms, achieving reliable detonation prevention between segments while maintaining lower density and reducing the weight compared to solid traditional materials.
Solution Approach 2:
The partition walls utilize composite material structures combining different materials with complementary properties. These composites provide effective shock wave management through material heterogeneity, achieving reliable detonation prevention while optimizing the weight-volume relationship by selecting materials with appropriate density and shock resistance characteristics.
4Loss of energy
If graded density barriers are implemented, then shock attenuation efficiency is improved, but manufacturing complexity increases
Solution Approach 1:
The barrier structure implements spatially varying density characteristics where different regions have optimized local properties. The density gradient is designed to match the shock wave propagation pattern, with higher density regions positioned to intercept and attenuate the strongest shock components, maximizing energy dissipation efficiency while maintaining a systematic manufacturing approach.
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 graded barrier provides efficient shock attenuation, enabling flexible and precise explosive systems with reduced weight and volume, allowing for adaptable and effective munition designs that can manage detonation waves with reduced energy transfer to the surrounding environment.
Implementation Method 1
The barrier has a spatially graded structure in which a density of the structure varies across a thickness thereof. The graded structure includes a polymer having hollow containers dispersed in the polymer to provide the density of the graded structure.
Implementation Method 2
The barrier has a spatially graded structure in which a density of the structure varies across a thickness thereof. The graded structure includes a polymer having hollow containers dispersed in the polymer to provide the density of the graded structure.
Data Source
AI summary
A barrier for reduction of a shock wave. The barrier has a spatially graded structure in which a density of the structure varies across a thickness thereof. The graded structure includes a polymer having hollow containers dispersed in the polymer to provide the density of the graded structure. The barrier can be included in at least one of 1) an explosive device, 2) a war head, 3) a demolition charge, and 4) an explosive containment. These devices have an exterior housing and at least one partitioned segment inside the housing with the partitioned segment including the barrier for reduction of the shock wave. Partitioned sections of the explosive devices are selectively or in total detonated.