Thin Maple Bilayer Dataset

A wood bilayer consists of two bonded layers with differing material or anatomical properties. When exposed to changes in moisture, the layers expand or contract at different rates, producing curvature.

This makes bilayers a fundamental system for studying hygro-mechanical behavior, moisture-driven actuation, and material-informed design. Each bilayer sample in this dataset was subdivided into 19 segments, enabling segment-level analysis that captures local variations in swelling behavior and curvature response. The samples were fabricated with four passive–active thickness ratios: 2:8, 3:7, 4:6, and 5:5.