Projectile Casing Irregular Breaking Points Uniform Fragmentation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Explosive projectiles with irregular wall thicknesses and uniformly distributed breaking points produce irregular fragment formation, leading to ineffective fragments due to varying masses and shapes, which impairs their impact on targets.
Innovation Solution
The projectile casing features irregularly spaced breaking points, with closer spacing in thicker regions and wider spacing in thinner regions, forming a grid that extends over the entire casing, ensuring uniform fragment formation by adapting to wall thickness variations and using heat treatment to create changes in material structure for predetermined breaking points.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If uniformly distributed breaking points are provided in the projectile casing, then the breaking points are simple to manufacture, but the fragment formation becomes irregular due to irregular wall thickness, leading to fragments with varying masses and shapes that reduce effectiveness
Solution Approach 1:
The breaking points are arranged with varying spacing according to the local wall thickness of the projectile casing. In regions with greater wall thickness, breaking points are spaced closer together, while in regions with smaller wall thickness, they are spaced farther apart. This local adaptation ensures that fragments formed from different wall thickness regions have more uniform mass and shape, resolving the contradiction between simple manufacturing and precise fragment uniformity.
2Reliability
If irregular wall thickness is used to ensure strength during firing, then the strength and reliability of the projectile casing is improved, but the fragment formation becomes irregular when combined with uniform breaking points, reducing the effectiveness of fragments
Solution Approach 1:
The breaking point arrangement is adapted to the irregular wall thickness profile of the projectile casing. By positioning breaking points closer together in thicker regions and farther apart in thinner regions, the invention compensates for the irregular wall thickness, ensuring that fragments from different locations have more uniform mass and shape while maintaining the strength benefits of irregular wall thickness design.
3Ease of manufacture
If predetermined breaking points extend only partially through the wall thickness, then the manufacturing process is simpler, but the projectile casing slants during detonation, causing irregular fragment formation and reduced effectiveness
Solution Approach 1:
The breaking points are designed to extend fully through the wall thickness of the projectile casing, creating complete separation planes. This full-depth segmentation prevents casing slanting during detonation and ensures that fragments break uniformly across the entire wall thickness, eliminating irregular fragment formation while maintaining manufacturing simplicity through the systematic grid arrangement.
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 increases the number of fragments with desired masses, reducing ineffective fragments and enhancing the explosive projectile's effect by ensuring uniform and effective fragmentation.
Implementation Method 1
using heat treatment to create changes in material structure for predetermined breaking points
Implementation Method 2
The fragments are accelerated by the pressure of the detonation of the explosive charge
Data Source
AI summary
A fragmentable projectile casing for an explosive projectile (7) has an irregular wall thickness (W) and predetermined breaking points (2) distributed over the projectile casing (1) for formation of fragments. The predetermined breaking points (2) for obtaining uniform fragments are spaced irregularly from one another. The predetermined breaking points (2) can have a smaller distance from one another in a region of greater wall thickness (W) and can be arranged in the manner of a grid and/or are formed as lines. Further, the predetermined breaking points (2) can run parallel to a longitudinal axis (L) of the projectile casing (1) and/or along a circumference (U) of the projectile casing (1).