Segmented Sabot with Low Rear Rigidity for Projectile Detachment
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Solution Overview
Problem
Conventional push-pull sabots have high rigidity on the rear, which shortens the interaction time during detachment but results in low damping effects, leading to direct transmission of lateral disturbances to the projectile and potential oscillation.
Innovation Solution
A sabot with multiple segments, designed to have a low degree of flexural rigidity at the rear ends, allowing for reduced impulsive forces during detachment and homogenization of detachment forces, thereby minimizing initial oscillation of the projectile.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If the sabot has high rigidity on the rear, then the interaction time during detachment is shortened, but the damping effect is reduced, leading to direct transmission of lateral disturbances to the projectile
Solution Approach 1:
The sabot is designed with non-uniform rigidity distribution: the front part maintains high rigidity for stable acceleration, while the rear part has reduced rigidity to provide damping during detachment. This local differentiation allows the rear sabot to absorb lateral disturbances through controlled deformation, preventing their direct transmission to the projectile while maintaining overall structural integrity where needed.
2Weight of moving object
If the sabot mass is reduced, then the projectile acceleration is improved, but the sabot becomes more susceptible to lateral disturbances
Solution Approach 1:
The sabot utilizes material with varying mechanical properties along its length. The rear portion employs materials or structures with lower elastic modulus and higher damping capacity, allowing it to be lighter while simultaneously providing better disturbance absorption. This parameter variation enables mass reduction without compromising the sabot's ability to filter lateral disturbances.
3Strength
If the sabot is made from high-strength materials, then the sabot can be optimized in shape and mass, but the material is stressed to a high degree, reducing damping capacity
Solution Approach 1:
Different portions of the sabot utilize materials with different strength-to-damping ratios. The front sabot uses high-strength materials for structural integrity during acceleration, while the rear sabot employs materials with superior damping characteristics even if slightly lower strength. This local material differentiation optimizes both strength requirements and damping performance throughout the sabot structure.
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 sabot design reduces impulsive forces and initial oscillation of the projectile, optimizing the dispersion pattern and improving the detachment process by reducing the mass moment of inertia of the sabot segments.
Implementation Method 1
The necessary driving force is generally generated by an air pocket which is exposed to the dynamic pressure by the ambient air.
Implementation Method 2
the lower the mass moment of inertia of the sabot segments about their rear rolling edge, the faster the detachment process and the lower the kinetic energy loss of the penetrator
Data Source
AI summary
The invention relates to a sabot (1) which comprises multiple sabot segments (1.1, 1.2, 1.3). The sabot (1) or the sabot segments (1.1, 1.2, 1.3) are characterized by having a structural design at an end (10) opposite the shooting direction such that a low degree of flexural rigidity is achieved at said end (10). A sabot (1) with three sabot segments (1.1, 1.2, 1.3) is preferred. The sabot (1) or the sabot segments (1.1, 1.2, 1.3) have a rear part (3) as a push part and a front part (4) as a pull part. In order to optimize the shape and weight, the front part (4) and the rear part (3) have recesses (5, 6) in the sabot (1) or in the sabot segments (1.1, 1.2, 1.3). Braces (8, 9) are integrated between the recesses (5, 6), or the recesses (5, 6) are introduced between braces (8, 9).