Material-agnostic Functional Architecture for Multilayer Composite Systems

This work presents a material-agnostic functional architecture for multilayer composite systems. It introduces a system-level ordering framework based on Structural Functional Layers (SFL), which separates functional roles from material choices. The approach addresses mechanical, thermal, electrical, galvanic, and optical conflicts not through material optimization, but through explicit functional decoupling at the architectural level. Instead of prescribing materials, processes, geometries, or products, the framework defines roles, constraints, and relationships that remain stable across implementations. A central element is a pre-AI constraint logic that excludes structurally invalid material–function combinations prior to simulation, optimization, or AI-assisted design. The framework is modular, scalable, and application-neutral. This preprint is intended as an open conceptual infrastructure for research, industry, and interdisciplinary development, providing a shared language for complex composite system design without enforcing proprietary solutions.