Anelasticity to plasticity transition in a model two-dimensional amorphous solid

作     者：尚宝双 Baoshuang Shang

作者机构：Songshan Lake Materials LaboratoryDongguan 523808China 

出 版 物：《Chinese Physics B》 (中国物理B（英文版）)

年 卷 期：2024年第33卷第1期

页      面：143-147页

核心收录：

学科分类：08[工学] 080102[工学-固体力学] 0801[工学-力学（可授工学、理学学位）] 

基　　金：Project supported by Guangdong Major Project of Basic and Applied Basic Research,China (Grant No.2019B030302010) the National Natural Science Foundation of China (Grant No.52130108) Guangdong Basic and Applied Basic Research,China (Grant No.2021B1515140005) Pearl River Talent Recruitment Program (Grant No.2021QN02C04) 

主　　题：amorphous solid deformation mechanism anelasticity to plasticity transition molecular dynamics simulation 

摘      要：Anelasticity, as an intrinsic property of amorphous solids, plays a significant role in understanding their relaxation and deformation mechanism. However, due to the lack of long-range order in amorphous solids, the structural origin of anelasticity and its distinction from plasticity remain elusive. In this work, using frozen matrix method, we study the transition from anelasticity to plasticity in a two-dimensional model glass. Three distinct mechanical behaviors, namely,elasticity, anelasticity, and plasticity, are identified with control parameters in the amorphous solid. Through the study of finite size effects on these mechanical behaviors, it is revealed that anelasticity can be distinguished from *** serves as an intrinsic bridge connecting the elasticity and plasticity of amorphous solids. Additionally, it is observed that anelastic events are localized, while plastic events are subextensive. The transition from anelasticity to plasticity is found to resemble the entanglement of long-range interactions between element excitations. This study sheds light on the fundamental nature of anelasticity as a key property of element excitations in amorphous solids.