Explosive Charge Initiation via Segmented Core and Jacket
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Solution Overview
Problem
Existing explosive charge initiation systems often experience uncontrolled transitions from deflagration to detonation, leading to unreliable initiation, especially in extreme conditions and heavily confined systems.
Innovation Solution
The system features an explosive charge core with varying dimensions and composition adapted to the casing, surrounded by a jacket with adjustable thickness and material, and includes venting to maintain deflagration over the entire length, preventing shock-induced detonation and optimizing energy dissipation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a detonator is used to initiate the explosive charge, then initiation is achieved, but uncontrolled transition to detonation occurs leading to unreliable deflagration
Solution Approach 1:
The explosive charge is divided into a core region and an outer shell region with different explosive materials. The core contains high-explosive material for reliable initiation, while the outer shell contains low-explosive material that maintains deflagration. This segmentation prevents uncontrolled transition to detonation while ensuring reliable initiation.
Solution Approach 2:
Different regions of the explosive charge are assigned different properties: the core region has high explosive material with specific density and composition optimized for initiation, while the outer shell has low explosive material with properties optimized for sustained deflagration. This local differentiation ensures reliable deflagration initiation throughout the charge.
2Reliability
If the explosive charge core has large transverse dimensions, then initiation coverage is improved, but shock-induced detonation becomes more likely
Solution Approach 1:
The explosive charge uses different materials in different regions: the core has high-explosive material for reliable initiation coverage, while the outer shell has low-explosive material that is less sensitive to shock. This local differentiation maintains initiation coverage while reducing shock-induced detonation risk in the outer regions.
Solution Approach 2:
The explosive charge is constructed as a composite system with inner core material (high-explosive) and outer shell material (low-explosive). This composite structure combines the advantages of both materials: reliable initiation from the core and shock resistance from the outer shell, preventing uncontrolled detonation.
3Power
If the explosive charge is heavily confined, then energy release is increased, but transition to detonation becomes more likely
Solution Approach 1:
The explosive charge uses different materials in different regions to handle confinement differently: the core region with high-explosive material benefits from confinement for powerful initiation, while the outer shell with low-explosive material is designed to maintain deflagration even under heavy confinement. This local differentiation allows energy release enhancement without triggering unwanted detonation.
4Reliability
If the explosive charge core charge is increased, then initiation effectiveness is improved, but risk of uncontrolled detonation increases
Solution Approach 1:
The explosive charge is segmented into core and outer shell regions. The core region contains high-explosive material with sufficient charge for effective initiation, while the outer shell contains low-explosive material that acts as a buffer. This segmentation ensures initiation effectiveness from the core while the outer shell prevents uncontrolled detonation propagation.
Solution Approach 2:
The explosive charge is a composite system combining high-explosive core material and low-explosive outer shell material. The core provides effective initiation with adequate charge, while the outer shell material has properties that prevent uncontrolled detonation, creating a balanced system that achieves reliability without uncontrolled reaction.
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
This approach ensures controlled and reliable deflagration across the entire explosive charge, even in extreme conditions, by spatially separating pressure and flame fronts, reducing shock sensitivity, and managing energy dissipation, thus preventing unwanted transitions to detonation.
Implementation Method 1
Device for the controlled initiation of the deflagration of an explosive charge arranged in a casing
Implementation Method 2
the device has a vent in the initiation area
Data Source
Figure 1~3
AI summary
A device for triggering a subdetonative reaction, in particular a deflagration, of an explosive charge of a weapon system can be adapted by measures to the configuration of the explosive charge and, if present, its casing, to such an extent that a stable deflagration of the entire explosive charge is achieved.