{
    "title": "Metal Microlattice",
    "inventor_name": "Sophia Yang et al.",
    "publication_year": null,
    "device_name": "Metal Microlattice",
    "goal": "Provide an ultra-lightweight, high-strength structural material for aerospace, automotive and impact-protection applications.",
    "problem_addressed": "Need for structural components with exceptional strength-to-weight ratios, internal ventilation for honeycomb cores, and enhanced energy-absorption for blast and impact mitigation.",
    "concept_summary": "A metallic micro-lattice (micro-truss) structure that is up to 99.99 % air, offering record low density while retaining sufficient mechanical strength. The lattice can be coupled to honeycomb cores to create ventilated aero-structures, and its geometry can be graded to vary stiffness across a sheet. Variants can be filled with compressible fluid for additional energy-absorption capability.",
    "detailed_description": null,
    "category": "Mechanical Engineering",
    "principles": [
        "Cellular lattice architecture",
        "Graded material properties",
        "Ventilation through open-cell structure",
        "Energy dissipation via plastic deformation and fluid compression"
    ],
    "scientific_domains": [
        "Materials Science",
        "Mechanical Engineering",
        "Aerospace Engineering"
    ],
    "mechanisms_of_action": [
        "Load bearing through a network of micro-trusses",
        "Airflow enabled by the open-cell lattice",
        "Impact energy absorption by controlled buckling and fluid compression"
    ],
    "materials": [
        "Metallic alloy (e.g., aluminum, nickel, titanium)",
        "Honeycomb core (typically aluminum)"
    ],
    "energy_sources": [],
    "inputs": [
        "Air flow",
        "Mechanical loads (compression, tension, impact)"
    ],
    "outputs": [
        "Structural support",
        "Ventilation of interior cavities",
        "Energy absorption / impact mitigation"
    ],
    "claimed_performance": "99.99 % air (lightest metallic structure ever made); strong enough to balance on a dandelion; capable of supporting aircraft-scale loads while providing ventilation and blast-mitigation.",
    "experimental_evidence": null,
    "replication_status": null,
    "keywords": [
        "micro-lattice",
        "metallic foam",
        "ventilated aero-structure",
        "energy-absorbing truss",
        "graded material",
        "lightweight aerospace"
    ],
    "related_technologies": [
        "Honeycomb sandwich panels",
        "Additive manufacturing of metal lattices",
        "Micro-truss fabrication",
        "Compressible fluid-filled structures"
    ],
    "controversy_level": "low",
    "confidence_score": 0.85,
    "practicability_score": 0.6,
    "fringe_score": 0.2,
    "evidence_strength": 0.4,
    "risk_score": 0.2,
    "trl_estimate": 6,
    "source_urls": [
        "https://www.youtube.com/watch?v=k6N_4jGJADY",
        "http://worldwide.espacenet.com/advancedSearch?locale=en_EP"
    ],
    "organizations": [
        "Boeing",
        "DARPA"
    ],
    "applications": [
        "Aircraft structural panels",
        "Ventilated wing skins",
        "Impact protection for vehicles",
        "Blast mitigation in protective gear"
    ],
    "limitations": [
        "Complex micro-fabrication processes",
        "Scale-up to large-area panels may be costly",
        "Potential fatigue under cyclic loading"
    ],
    "open_questions": [
        "Long-term durability of metal micro-lattices in harsh environments",
        "Performance under extreme temperature variations",
        "Cost-effective mass production methods"
    ],
    "red_flags": [],
    "evidence_quotes": [
        "Boeing's micro lattice metal -- Microlattice is the lightest metallic structure ever made. At 99.99% air, it's light enough to balance on top of a dandelion, while its structure makes it strong.",
        "Ventilated aero-structures include a micro-lattice structure operatively coupled to a honeycomb core. The interface ... is configured to permit air flow to and from the honeycomb core via the micro-lattice structure.",
        "A micro-truss sheet having material properties that vary across the sheet. The diameter of the truss members ... may differ from the diameter of the truss members at another point in the sheet.",
        "Energy-absorbing truss structures for mitigation of injuries from blasts and impacts ... periodic, ordered micro-micro-truss structures with enhanced energy absorption capabilities."
    ]
}