Architected Composite Layers for Impact Energy Absorption
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Solution Overview
Problem
Conventional composite materials, particularly carbon fiber composites, face challenges such as discontinuity and anisotropy, leading to failure modes like fiber buckling, interfiber failure, and interlaminar failure, and lack the ability to achieve tunable impact energy mitigation and damping properties effectively.
Innovation Solution
The development of composite material systems with architected three-dimensional geometries and a fully infiltrated matrix phase, allowing for continuous and deterministic structures that can absorb impact energy and provide tunable damping behavior, using additive manufacturing to create structures with arbitrary geometries and resonators for enhanced mechanical properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If conventional carbon fiber composites with discontinuous fibers are used, then manufacturing is easier, but mechanical strength and reliability deteriorate due to fiber buckling, interfiber failure, and interlaminar failure
Solution Approach 1:
The patent divides the continuous fiber reinforcement into discrete, controlled fiber placements within a matrix material. Individual fibers or fiber bundles are positioned at specific locations and orientations to provide reinforcement while maintaining manufacturability through automated fiber placement techniques.
Solution Approach 2:
The patent transitions from traditional two-dimensional laminae to three-dimensional fiber architectures. Fibers are placed in multiple layers with varying orientations (0°, 45°, 90°, -45°) to create a three-dimensional reinforcement structure that eliminates interlaminar failure planes and provides superior mechanical properties in all directions.
2Stability of the object's composition
If woven-fiber laminae are used to reduce anisotropy, then contact between fibers increases, but the reinforcing phase remains discontinuous leading to interfiber and interlaminar failure
Solution Approach 1:
The patent applies preliminary surface treatments to fibers before placement, including sizing agents and coupling agents that enhance fiber-matrix adhesion. This preliminary preparation ensures strong bonding between fibers and matrix material, preventing interfiber failure and improving overall composite reliability.
Solution Approach 2:
The patent uses a hybrid composite system combining organic matrix material with inorganic reinforcement fibers. The matrix material provides a continuous phase that binds the discrete fibers together, creating a unified composite structure that eliminates the discontinuity problems of traditional fiber composites while maintaining high strength and stiffness.
3Stability of the object's composition
If unidirectional fiber laminae are used to achieve isotropy, then a laminate structure is formed, but stretching-bending coupling and interlaminar failure occur
Solution Approach 1:
The patent employs three-dimensional fiber placement techniques that distribute reinforcement fibers throughout the volume of the composite part rather than confining them to two-dimensional layers. This 3D architecture eliminates the stretching-bending coupling inherent in laminated structures and removes interlaminar failure planes while maintaining isotropic mechanical properties.
Solution Approach 2:
The patent uses automated fiber placement systems that can dynamically adjust fiber orientation, density, and distribution during manufacturing. This dynamic control allows optimization of fiber architecture for specific loading conditions and enables complex three-dimensional reinforcement patterns that would be impossible with traditional static laminate approaches.
4Strength
If continuous three-dimensional reinforcing phase is created, then mechanical strength improves, but manufacturing complexity and cost increase
Solution Approach 1:
The patent employs automated fiber placement systems that self-adjust and self-correct during the manufacturing process. The system automatically positions fibers with precise orientation and spacing, controls material deposition rates, and ensures complete matrix infiltration without requiring complex manual intervention or post-processing operations.
Solution Approach 2:
The patent utilizes controllable processing parameters including temperature, pressure, and material viscosity to optimize the infiltration of matrix material into the three-dimensional fiber architecture. By adjusting these parameters, the system achieves complete impregnation of fibers with matrix material while maintaining fiber orientation and spacing, creating a homogeneous composite structure with superior mechanical properties.
Data Source
AI summary
In an aspect, a composite material system comprises: a structure having an architected three-dimensional geometry; wherein said three-dimensional geometry is monolithic and deterministic; and a matrix phase; wherein said matrix phase at least partially infiltrates said structure. In some embodiments, the three-dimensional geometry is a nano- or micro-architected three-dimensional geometry.