Multifunctional Radiation-Hardened Composite Laminate
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing composite structures for aerospace applications face challenges in providing comprehensive protection against impact, radiation, thermal distortion, and thermal stresses, including weight penalties, mechanical failure, and inadequate conductivity for lightning strikes and electromagnetic interference.
Innovation Solution
A multifunctional composite laminate design featuring balanced and symmetric alternating high modulus metal and graphite adhesively joined layers, incorporating various materials for radiation shielding, thermal control, and conductive pathways to address these issues, including a thin low modulus thermal control polymer layer, high Z material layers, and optional conductive metallic nanoparticle or filament layers for enhanced protection and stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If mechanical shields (aluminum shields with multi-layer material) are used to protect aircraft and spacecraft from impact, then impact resistance is improved, but weight increases and instrument line of sight is blocked
Solution Approach 1:
The patent uses a composite laminate structure combining carbon fiber reinforced plastic (CFRP) and glass fiber reinforced plastic (GFRP) layers. This composite material approach provides impact resistance while maintaining lower weight compared to traditional aluminum shields, as the fiber-reinforced polymers offer high strength-to-weight ratios.
Solution Approach 2:
The shield is divided into multiple functional layers including CFRP layers for structural strength, GFRP layers for impact dispersion, and adhesive layers for bonding. This segmentation allows each layer to perform its specific function optimally while collectively providing protection without excessive weight.
2Object-affected harmful factors
If radiation shielding materials (gold plated tungsten-copper alloy foils) are used, then radiation protection is improved, but manufacturing cost increases and thermal expansion mismatch causes warpage and mechanical failure
Solution Approach 1:
The patent changes the material parameters by selecting aluminum foil (0.06-0.12mm thick) with specific thermal expansion characteristics that match the surrounding composite structure. This parameter selection avoids the thermal expansion mismatch problems of tungsten-copper alloys while maintaining radiation shielding effectiveness through optimized layer configuration.
Solution Approach 2:
The patent uses aluminum foil that is adhesively bonded to adjacent aluminum layers, creating homogeneous material interfaces. This homogeneity ensures uniform thermal expansion behavior across the shield structure, preventing warpage and bonding failure that occur with dissimilar material interfaces.
3Strength
If traditional composite materials (thermosetting and thermoplastic polymer impregnated fiber reinforcement) are used, then structural strength is achieved, but surface conductivity is insufficient for lightning strike and ESD protection
Solution Approach 1:
The patent merges two distinct functions into a single integrated shield structure: mechanical protection (through CFRP and GFRP layers) and electrical conductivity for lightning/ESD protection (through aluminum foil layers). The aluminum layers provide both structural integrity and conductive pathways, eliminating the need for separate protective systems.
Solution Approach 2:
The aluminum foil layers serve multiple functions simultaneously: they provide radiation shielding, maintain structural integrity through adhesion to adjacent layers, and conduct electrical energy from lightning strikes and ESD events. This multi-functionality reduces overall system complexity and weight.
4Stability of the object's composition
If multi-layer construction with various materials (metal foil, ceramic spacers, fibrous spacers) is used for thermal control, then thermal distortion resistance is improved, but manufacturing complexity increases
Solution Approach 1:
The patent applies thermal control functionality locally where needed through strategically placed aluminum foil layers within the composite structure. Rather than using complex multi-material constructions throughout, the aluminum layers are positioned at specific locations to provide thermal radiation reflection and control, simplifying manufacturing while maintaining thermal stability.
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 design achieves high strength-to-weight ratio, low distortion, and multi-faceted radiation protection while minimizing thermal distortion and weight, effectively addressing the limitations of previous designs by providing a comprehensive solution for aerospace applications.
Implementation Method 1
high Z material layers
Implementation Method 2
high Z material layers
Implementation Method 3
adhesively joined layers
Implementation Method 4
conductive metallic nanoparticle or filament layers
Data Source
AI summary
A multifunctional composite having high strength, low weight, low distortion, low CTE, impact resistance, and multi-faceted radiation protection.