Micromechanical Origin of Plasticity and Hysteresis in Nestlike Packings
Micromechanical Origin of Plasticity and Hysteresis in Nestlike Packings
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巢状填料塑性和滞后的微机械起源
DOI：
10.1103/physrevlett.128.198003
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发表时间：
2022
影响因子：
8.6
通讯作者：
King, Hunter
中科院分区：
文献类型：
--
作者：
Bhosale, Yashraj;Weiner, Nicholas;Butler, Alex;Kim, Seung Hyun;Gazzola, Mattia;King, Hunter
无粘结半弹性纤维的无序堆积代表了一类跨越不同环境和尺度的材料。从以树枝为基础的鸟巢到非织造纺织品，不同系统的整体力学产生于关于非永久性接触的组成细长元件的弯曲。在木棒的实验和计算包装中，我们确定了它们对循环固结压缩的响应的显著特征：非线性刚度、瞬时塑性以及最终可重复的与速度无关的滞后。我们将这些特征追溯到它们的微观机械起源，从内部接触的特征出现、消失和移位中识别出来。
Disordered packings of unbonded, semiflexible fibers represent a class of materials spanning contexts and scales. From twig-based bird nests to unwoven textiles, bulk mechanics of disparate systems emerge from the bending of constituent slender elements about impermanent contacts. In experimental and computational packings of wooden sticks, we identify prominent features of their response to cyclic oedometric compression: nonlinear stiffness, transient plasticity, and eventually repeatable velocity-independent hysteresis. We trace these features to their micromechanic origins, identified in characteristic appearance, disappearance, and displacement of internal contacts.