Impact resistance of bio-inspired sandwich beam with side-arched and honeycomb dual-core

The work explores computationally the impact resistance of the proposed bio-inspired sandwich beam comprising top and bottom carbon fiber reinforced polymer laminate skins sandwiching the side-arched hot melt adhesive and aluminum honeycomb dual-core, as bio-inspired by the beak, skull bone, hyoid, and spongy bone of the woodpecker head. Examined geometrical effects on the impact behaviors include the arched core thickness (3, 4.6, 10 mm) and leg span (10, 25, 35 mm). For impact performance appraisal, contact force, stress transmission, damage area, and absorption energy are assessed. The models with the thickest arched core may depict the highest contact force, damage area, and energy absorption; thinner arched cores with different leg spans are maximally stressed. Nonetheless, it is overall found that the beam with a thin arched core performs optimally due to its high impact resistance efficiency index.

Automated summary

The study computationally explores the impact resistance of a bio-inspired sandwich beam, inspired by the beak, skull bone, hyoid, and spongy bone of the woodpecker head. Geometrical effects on impact behaviors are examined, and the beam with a thin arched core is found to perform optimally due to its high impact resistance efficiency index. Models with thicker arched cores exhibit higher contact force, damage area, and energy absorption, while thinner arched cores with varying leg spans are maximally stressed.