Composite Blast Protection Panel With Delamination Energy Absorption
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Solution Overview
Problem
Military vehicles require lightweight materials that provide effective blast and ballistic protection without compromising mobility, as traditional steel and aluminum solutions add significant weight and reduce mobility.
Innovation Solution
A composite material using thick, fibre-reinforced resin sheets with alternating unidirectional fibre orientations, specifically at right angles and acute angles, to enhance blast resistance and delamination under impact, providing quasi-isotropic properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If thick steel is used for blast protection, then blast resistance is improved, but vehicle weight increases significantly
Solution Approach 1:
The patent employs a composite material consisting of fibre-reinforced resin sheets with alternating unidirectional fibre orientations at right angles and acute angles. This composite structure provides comparable or superior blast resistance to thick steel while significantly reducing vehicle weight, thereby resolving the contradiction between strength and weight.
Solution Approach 2:
The blast protection panel is segmented into multiple thin fibre-reinforced resin sheets stacked in alternating orientations. This segmentation allows the structure to absorb and distribute impact energy more effectively than a solid steel plate of equivalent weight, achieving high blast resistance without excessive mass.
2Reliability
If aluminum or steel is used for blast protection, then protective capability is improved, but mobility is reduced
Solution Approach 1:
The fibre-reinforced resin composite material provides high protective capability against blast and ballistic threats while being significantly lighter than aluminum or steel alternatives. This weight reduction directly improves vehicle mobility, speed, and off-road capabilities without compromising protective reliability.
Solution Approach 2:
The patent changes the material parameters by using thin sheets (0.3-1.1 mm per sheet) with specific fibre orientations and stacking sequences. This parameter optimization achieves high protective capability at reduced weight, thereby improving mobility while maintaining reliability.
3Weight of moving object
If composite materials are used for weight reduction, then mobility is improved, but blast resistance is insufficient
Solution Approach 1:
The patent develops a specialized composite material system using fibre-reinforced resin sheets with controlled thickness (0.3-1.1 mm), specific fibre orientations (alternating unidirectional at right angles and acute angles), and proper stacking sequences. This composite structure achieves blast resistance comparable to or exceeding traditional materials while maintaining the weight advantages of composites.
Solution Approach 2:
The composite panel is designed with locally optimized fibre orientations and stacking sequences to handle specific blast loading conditions. The alternating unidirectional orientations at right angles and acute angles provide tailored mechanical properties in different directions, ensuring adequate blast resistance while minimizing weight.
4Strength
If fibre-reinforced resin sheets are used with alternating orientations, then blast resistance is improved, but manufacturing complexity increases
Solution Approach 1:
The panel is manufactured by stacking pre-fabricated fibre-reinforced resin sheets with controlled orientations. This segmentation approach allows for standardized sheet production and simplified assembly, reducing overall manufacturing complexity while achieving the required alternating orientation pattern for optimal blast resistance.
Solution Approach 2:
The use of fibre-reinforced resin sheets with alternating unidirectional orientations creates a quasi-isotropic composite structure that provides balanced mechanical properties. This composite architecture improves blast resistance while the modular sheet-based construction facilitates relatively straightforward manufacturing processes.
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 composite material offers improved blast resistance, reduced back-face deformation, and increased impact energy absorption, maintaining structural integrity while reducing weight, thus enhancing vehicle mobility.
Implementation Method 1
high impact energy absorption
Implementation Method 2
delamination under impact
Data Source
Figure 1A~1B
Figure 2
Figure 3
AI summary
In an aspect of the invention there is provided a blast protection panel, comprising a package of fibre-reinforced resin sheets, each sheet having a dominant unidirectional fibre orientation, said package of fibre-reinforced resin sheets formed in packed stacks, each stack comprising at least four fibre-reinforced resin sheets with dominant unidirectional fibres oriented, within said each stack, alternatingly at about right angles relative to each other; and said each stack packed against adjacent stacks, said adjacent stacks comprising sheets with dominant unidirectional fibres oriented at acute angles relative said each stack thereby forming a delamination interface.