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

作　　者：尚宝双 Baoshuang Shang(Songshan Lake Materials Laboratory,Dongguan 523808,China)

机构地区：[1]Songshan Lake Materials Laboratory,Dongguan 523808,China

出　　处：《Chinese Physics B》2024年第1期143-147,共5页中国物理B（英文版）

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)。

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 plasticity.Anelasticity 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.

关 键 词：amorphous solid deformation mechanism anelasticity to plasticity transition molecular dynamics simulation 

分 类 号：O34[理学—固体力学]