noun
sandwich structure
Technical term for a layered construction with a core between two outer layers, used in engineering, materials science, and sometimes metaphorically.
このパネルはサンドイッチ構造で、軽くて強い。
This panel has a sandwich structure, making it light and strong.
Compound of サンドイッチ (sandwich) + 構造 (structure), a direct calque from English 'sandwich structure'.