2026-10-14T13:22:04Z https://www.scidb.cn/oai

10.57760/sciencedb.41482 2026-07-02T16:15:42Z

2026-07-02 Shock wave propagation of nest-like structures under axial impact doi:10.57760/sciencedb.41482 en Inspired by natural bird nests, nest-like structures consist of randomly packed slender particles confined within a container. This study investigates the dynamic behavior of nest-like structures by finite element simulation and a shock model. Under dynamic impact conditions, the nest-like structures exhibit distinct mechanisms compared to quasistatic loading. A confined deformation zone with nearly uniform stress forms near the loading end. This zone propagates steadily into the undeformed region at a constant velocity. Notably, the expansion speed exceeds the loading rate but remains significantly slower than the stress wave speed in solid material. We proposed a rigidperfectly plastic-locking (R-P-P-L) shock model to quantitatively establish how initial conditions govern two critical dynamic responses: the stress in the confined zone and the expansion velocity of the confined zone. These dynamic characteristics of nest-like structures demonstrate their potential for impact resistance. Nest-like structure; Dynamic behavior; Shock model; Finite element model; Impact resistance 刘畅 彭青 魏悦广 刘小明 PUBLIC https://creativecommons.org/publicdomain/zero/1.0/ dataset http://www.doi.org/10.1016/j.taml.2025.100649 Science Data Bank