Multi-functional Layered Composite for Spacecraft Radiation Shielding
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Solution Overview
Problem
Long-duration deep-space missions face challenges in protecting crew from harmful cosmic and solar radiation due to the lack of effective shielding, particularly on manned missions like Mars, where the Martian atmosphere offers insufficient protection, and existing solutions fail to combine structural integrity with adequate radiation protection in a cost-effective and mass-efficient manner.
Innovation Solution
A multi-functional layered structure composed of three layers: the first layer with 30-42% UHMW polyethylene fibers and 18-30% graphite fibers in an epoxy resin matrix for structural and radiation shielding, the second layer with 68% UHMW polyethylene fibers and 32% polyethylene matrix for enhanced radiation shielding, and a ceramic third layer for micro-meteoroid protection, providing a strong, lightweight composite that can be fabricated into various shapes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If separate structural members and radiation shielding are used, then radiation protection is provided, but vehicle mass increases and structural complexity increases
Solution Approach 1:
The patent combines structural support and radiation shielding functions into a single integrated composite structure. The layered composite material incorporates radiation-shielding components (such as hydrogen-rich materials like polyethylene or water) within the structural layers, allowing the same structure to simultaneously bear mechanical loads and attenuate cosmic and solar radiation, thereby eliminating the need for separate shielding mass.
Solution Approach 2:
The composite structure is designed to perform multiple functions: it provides structural support for the vehicle while simultaneously serving as radiation shielding. The layered configuration allows different materials to contribute different functions - structural integrity from composite materials and radiation attenuation from hydrogen-rich layers - creating a universal structure that replaces both structural members and dedicated shielding.
2Reliability
If separate structural members and radiation shielding are used, then radiation protection is provided, but device complexity increases
Solution Approach 1:
The patent merges structural support and radiation shielding into a single integrated composite structure. The layered composite material incorporates radiation-shielding components (such as hydrogen-rich materials like polyethylene or water) within the structural layers, allowing the same structure to simultaneously bear mechanical loads and attenuate cosmic and solar radiation, thereby eliminating the need for separate shielding mass.
Solution Approach 2:
The composite structure is designed to perform multiple functions: it provides structural support for the vehicle while simultaneously serving as radiation shielding. The layered configuration allows different materials to contribute different functions - structural integrity from composite materials and radiation attenuation from hydrogen-rich layers - creating a universal structure that replaces both structural members and dedicated shielding.
3Reliability
If traditional shielding materials are used, then radiation shielding is provided, but vehicle mass increases
Solution Approach 1:
The patent employs composite materials that integrate structural components with radiation-shielding materials. The composite structure uses layers of structural materials (such as carbon-fiber reinforced polymers) combined with hydrogen-rich radiation-shielding materials (such as polyethylene or water). This composite approach provides effective radiation attenuation while maintaining low mass, as the shielding function is achieved through material composition rather than sheer mass.
Solution Approach 2:
The patent optimizes the thickness and composition of each layer to achieve the required radiation shielding with minimum mass. By carefully controlling the parameters of the composite structure - such as the ratio of structural to shielding materials, layer thicknesses, and material densities - the design achieves effective radiation protection while minimizing vehicle mass.
4Weight of moving object
If multi-functional materials are developed, then vehicle mass is reduced, but manufacturing complexity increases
Solution Approach 1:
The patent divides the structure into discrete layers, each with specific functions (structural support, radiation shielding, thermal control). This segmentation allows each layer to be manufactured separately using established techniques, then assembled into the final multi-functional composite structure. The layered approach simplifies manufacturing by breaking down the complex multi-functional requirement into manageable, independently manufacturable components.
Solution Approach 2:
The patent employs composite materials that integrate structural components with radiation-shielding materials. The composite structure uses layers of structural materials (such as carbon-fiber reinforced polymers) combined with hydrogen-rich radiation-shielding materials (such as polyethylene or water). This composite approach provides effective radiation attenuation while maintaining low mass, as the shielding function is achieved through material composition rather than sheer mass.
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 structure effectively shields against cosmic and solar radiation while offering structural support and micro-meteoroid protection, reducing vehicle mass and simplifying propulsion system design, using commercially available materials and proven manufacturing techniques.
Implementation Method 1
The composition of the first layer is 30-42 percent by volume of ultra-high molecular weight (UHMW) polyethylene fibers, 18-30 percent by volume of graphite fibers
Implementation Method 2
provides cosmic and solar radiation shielding
Implementation Method 3
The third layer is composed of a ceramic material
Data Source
AI summary
A cosmic and solar radiation shielding structure that also has structural attributes is comprised of three layers. The first layer is 30-42 percent by volume of ultra-high molecular weight (UHMW) polyethylene fibers, 18-30 percent by volume of graphite fibers, and a remaining percent by volume of an epoxy resin matrix. The second layer is approximately 68 percent by volume of UHMW polyethylene fibers and a remaining percent by volume of a polyethylene matrix. The third layer is a ceramic material.