High-Strength Reactive Alloy Munitions Structures for Tailored Fragmentation

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Solution Overview

Problem

Conventional munitions structures lack the ability to tailor both blast pressure generation and mechanical impact for optimal damage to targets, as they are typically made of non-energetic materials that do not contribute to chemical energy release.

Innovation Solution

The use of high-strength reactive alloys, particularly bulk metallic glasses, with tailored geometric shaping to create munitions structures that incorporate geometric features such as V-grooves or semi-circular grooves, allowing for optimized fragmentation and combustion reactions with ambient oxygen/nitrogen to enhance both kinetic and chemical energy delivery.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Use of energy by moving object

If conventional structural materials (steel or brass) are used for munitions structure, then structural strength and integrity are maintained, but the ability to generate chemical energy and contribute to blast pressure is lost

Engineering Contradiction:

Improvechemical energy releaseVSAvoidstructural strength

Core Design Contradiction:

Use of energy by moving objectVSStrength

Solution Approach 1:

The munitions structure uses composite materials combining reactive metal particles (aluminum, magnesium, titanium, zirconium) embedded in a structural matrix (steel, aluminum alloy, or titanium alloy). This composite structure provides both structural integrity and chemical energy release capabilities, resolving the contradiction between strength and energy utilization.

Inventive Principle:

Principle #40Composite materials

Solution Approach 2:

The invention changes the material parameters by incorporating reactive metal particles with specific characteristics (size distribution, concentration, reactivity) into the structural material. This parameter modification enables the structure to transition from purely mechanical function to dual mechanical-chemical function, allowing both strength maintenance and energy release.

Inventive Principle:

Principle #35Parameter changes

2Adaptability or versatility

If conventional non-energetic materials are used for munitions structure, then structural integrity is maintained, but fragmentation lethality and damage mechanism versatility are reduced

Engineering Contradiction:

Improvedamage mechanism versatilityVSAvoidmanufacturing complexity

Core Design Contradiction:

Adaptability or versatilityVSEase of manufacture

Solution Approach 1:

The reactive metal particles are pre-distributed and pre-positioned within the structural material during manufacturing. This preliminary action ensures that when fragmentation occurs, the reactive particles are already in optimal positions to generate chemical energy and enhance lethality, eliminating the need for additional complex mechanisms.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The munitions structure serves multiple functions simultaneously: structural support, fragmentation generation, and chemical energy release. The same structural material acts as both the load-bearing component and the energetic fragment source, providing versatility in damage mechanisms without requiring separate systems for each function.

Inventive Principle:

Principle #6Universality (Multi-functionality)

3Manufacturing precision

If high-strength reactive alloys with geometric features are used, then fragmentation uniformity and energy release are improved, but manufacturing precision requirements increase

Engineering Contradiction:

Improvefragmentation control precisionVSAvoidgeometric feature complexity

Core Design Contradiction:

Manufacturing precisionVSDevice complexity

Solution Approach 1:

The geometric features are segmented into standardized patterns (grooves, ridges, or other geometric configurations) that can be manufactured using conventional techniques. These segmented geometric features control fragmentation in a predictable manner, achieving precision without requiring overly complex manufacturing processes.

Inventive Principle:

Principle #1Segmentation

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 munitions structures achieve improved lethality by generating uniform fragment distribution and rapid pressure increase, reducing the need for high explosives while maintaining or enhancing penetration and blast capabilities.

Implementation Method 1

combustion reactions with ambient oxygen/nitrogen to enhance both kinetic and chemical energy delivery

Methodology Applied

Scientific EffectCombustion: Combustion

Implementation Method 2

combustion reactions with ambient oxygen/nitrogen

Methodology Applied

Scientific EffectOxidation: Oxidation

Implementation Method 3

tailored geometric shaping to create munitions structures that incorporate geometric features such as V-grooves or semi-circular grooves, allowing for optimized fragmentation

Methodology Applied

Scientific EffectFracture Mechanics: Fracture Mechanics

Data Source

PatentUS12449242B1High-strength munitions structure with tailored fragmentation

Publication Date: 2025.10.21 WASHINGTON STATE UNIVERSITY

AI summary

A bulk metallic glass (BMG) material includes at least one high strength reactive alloy having a surface on which one or more surface features are formed. The one or more surface features are configured to at least partially control a fragmentation of the BMG material. The BMG material forms a cavity within which an explosive is configured to reside.