Multi-Layer Metallic Shield Assembly for Spacecraft Impact Protection
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Solution Overview
Problem
Conventional Whipple shields are ineffective against dense objects traveling at high velocities, as they are easily penetrated by larger and denser objects, and existing armor solutions are too heavy for spacecraft, posing a mass and bulk burden.
Innovation Solution
A multi-layered metallic shield assembly comprising a thin exterior metal layer, a high-density metal layer, a metal foam layer, a dense metal layer, and a low-melting-point metal layer, with a gap between the shield and the structure, designed to absorb and dissipate the impact energy through sequential melting and momentum transfer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a thin metal shield is used in conventional Whipple shields, then the shield can melt or vaporize micrometeorites effectively, but it is easily penetrated by larger and denser objects
Solution Approach 1:
The shield assembly uses a composite structure with multiple metal layers of different densities and properties. The outer thin layer melts vaporizes projectiles, while inner denser layers provide structural strength and additional protection against penetration by dense objects
Solution Approach 2:
The shield employs a nested multi-layer configuration where successive metal layers are arranged concentrically. Each layer serves a specific function in the impact sequence, with the structure protecting inner layers while progressively dissipating impact energy
2Strength
If thick armor assemblies are used to resist penetration by dense projectiles, then protection effectiveness is improved, but the mass and bulk become too heavy for spacecraft
Solution Approach 1:
The invention changes the density parameter distribution across multiple layers rather than using uniform thick armor. By varying density and thickness of each layer, the assembly achieves equivalent protection to heavy monolithic armor but with reduced overall mass and optimized weight distribution
Solution Approach 2:
The shield divides the protective function into multiple segmented layers, each contributing to overall protection. This segmentation allows the system to achieve the same protection level as thick monolithic armor while distributing mass and reducing the weight penalty for spacecraft
3Object-affected harmful factors
If the entire portion of the thin shield interacting with the projectile melts or vaporizes, then penetration is prevented, but the shield provides no protection against larger denser objects
Solution Approach 1:
The multi-layer metal shield assembly performs multiple protective functions simultaneously. The outer layers handle vaporization of micrometeorites while inner layers provide structural barriers against denser objects, making the single assembly effective against a universal range of impactors from tiny micrometeorites to larger dense debris
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 shield assembly significantly reduces weight and thickness while effectively stopping dense projectiles up to 1 kg, allowing for earlier detection and avoidance of impacts, and preventing penetration without the need for heavy armor.
Implementation Method 1
Micrometeorites impacting the thin metal shield would melt or vaporize, as would the part of the shield in contact with the projectile
Implementation Method 2
Micrometeorites impacting the thin metal shield would melt or vaporize
Implementation Method 3
designed to absorb and dissipate the impact energy through sequential melting and momentum transfer
Implementation Method 4
Shear stresses generated in shields by impact at hypersonic velocities greatly exceed the mechanical strength of any material
Data Source
AI summary
A shield assembly for protection of vehicles traveling in space consisting of at least five layers that would replace the thin metal impact shield in Whipple shields fabricated using the current art that employs only a single metal. All of the layers in the present invention are metallic. At least three different metals must be used in this invention. FIG. 1 shows the basic embodiment of the transparent blast protection assembly. The shield assembly (10) comprises a first metal layer (20), a second metal layer (30), a third metal foam layer (40), a fourth metal layer (50), and a fifth metal layer (60). At least one spacer component (70) is used to create and maintain a space between the structure requiring impact protection (80) and the shield assembly.