Segmented Explosive System with Non-Propagation Gaps
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Solution Overview
Problem
Explosive devices are sensitive to various stimuli, leading to unintended detonation risks during storage, transportation, and tactical usage, and existing solutions require complex initiation systems or are susceptible to external stimuli.
Innovation Solution
A system comprising sub-critical explosive portions that are initially separated by a non-propagation gap, which can be reconfigured to achieve effective detonation dimensions by bringing complementary surfaces into proximity, allowing for selective transformation into a detonable state.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If explosive charges are made more sensitive to ensure reliable detonation, then detonation reliability is improved, but susceptibility to external stimuli increases
Solution Approach 1:
The explosive charge is divided into multiple sub-critical portions separated by non-detonative material. Each portion is too small to sustain detonation independently, but when combined they form a critical mass. This segmentation allows the system to remain insensitive to external stimuli while maintaining reliable detonation capability when properly initiated.
Solution Approach 2:
A non-detonative intermediary material (such as binder or carrier medium) is introduced between the explosive portions. This intermediary acts as a separator that prevents premature detonation and protects against external stimuli, while still allowing the portions to function as a unified explosive system when initiated through the designated initiation point.
2Object-affected harmful factors
If multiple sub-critical charges are used to reduce sensitivity, then safety is improved, but complexity of initiation system increases
Solution Approach 1:
Multiple sub-critical explosive portions are merged into a single integrated system where they are separated by non-detonative material but remain configured to function together. This merging allows a single initiation point to reliably detonate the entire assembly without requiring complex multi-point initiation systems, while maintaining safety through the sub-critical configuration.
3Object-affected harmful factors
If explosive dimensions are reduced below critical dimensions to prevent unintended detonation, then safety is improved, but ability to sustain detonation is worsened
Solution Approach 1:
The explosive charge is segmented into multiple portions, each with dimensions below the critical threshold for independent detonation. This ensures safety by preventing unintended detonation of individual portions. However, when these sub-critical portions are properly configured and initiated together, they collectively achieve critical dimensions and sustain detonation throughout the entire charge.
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 system effectively reduces sensitivity to stimuli, enabling controlled detonation with a single initiation point and minimizing risks by maintaining a non-detonable state until transformation, thus ensuring safety and scalability of explosive effects.
Implementation Method 1
the complementary surfaces are separated by a non-propagation gap sufficient to prevent propagation of detonation between the complementary surfaces
Implementation Method 2
fire that can 'go DDT' (deflagration to detonation transition)
Data Source
AI summary
An explosive system and corresponding method employ a number of explosive portions, each of sub-critical dimensions so that initiation of the portion would result in incomplete detonation. A selectively-deployable spacer arrangement or deployment mechanism is deployed between a storage state in which gaps or misalignments are maintained between the explosive portions so that the explosive system remains undetonatable, and a detonable state in which the portions are brought together sufficiently to function as a combined explosive charge having effective dimensions larger than critical dimensions, rendering the explosive system detonatable.