Gene

Deformation (meteorology)

Algorithm

Linguistics

Composite number

Philosophy

Materials science

Stress (linguistics)

Biochemistry

Computer science

Acoustics

Stress–strain curve

Fractional Fourier transform

Physics

Mathematics

Microstructure

Fourier analysis

Transcription factor

Mathematical analysis

Artificial intelligence

Composite material

High fidelity

Repressor

Discrete Fourier transform (general)

Chemistry

Operator (biology)

Artificial neural network

Generalization

Fourier transform

iScience

Increased demands for high-performance materials have led to advanced composite materials with complex hierarchical designs. However, designing a tailored material microstructure with targeted properties and performance is extremely challenging due to the innumerable design combinations and prohibitive computational costs for physics-based solvers. In this study, we employ a neural operator-based framework, namely Fourier neural operator (FNO), to learn the mechanical response of 2D composites. We show that the FNO exhibits high-fidelity predictions of the complete stress and strain tensor fields for geometrically complex composite microstructures with very few training data and purely based on the microstructure. The model also exhibits zero-shot generalization on unseen arbitrary geometries with high accuracy. Furthermore, the model exhibits zero-shot super-resolution capabilities by predicting high-resolution stress and strain fields directly from low-resolution input configurations. Finally, the model also provides high-accuracy predictions of equivalent measures for stress-strain fields, allowing realistic upscaling of the results.

Learning the stress-strain fields in digital composites using Fourier neural operator