Effect of plasticity on the coefficient of restitution of an elastoplastic sphere impacting an elastic plate

doi:10.1016/j.ijsolstr.2021.03.023

CORC > 力学研究所 > 中国科学院力学研究所 > 非线性力学国家重点实验室

	Effect of plasticity on the coefficient of restitution of an elastoplastic sphere impacting an elastic plate
	Peng Q(彭青)2,3; Jin, Y.2,3; Liu XM(刘小明)2,3; Wei YG(魏悦广)1
刊名	INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES
	2021-07-01
卷号	222 页码:11
关键词	Sphere-plate impact Contact plasticity Modified Zener model Coefficient of restitution Thickness dependent COR
ISSN号	0020-7683
DOI	10.1016/j.ijsolstr.2021.03.023
通讯作者	Liu, X.(xiaomingliu@imech.ac.cn)
英文摘要	A sphere impacting a plate is different from impacting a half-space bulk, because energy in the former case can be dissipated in a form of flexural wave propagating on the plate. Such energy loss by the elastic wave can be explained by the Zener model; however, this model is only valid for low-velocity impact with elastic Hertzian contact law. For high-velocity impact with contact plasticity, the Zener model is not valid any ore because energy dissipation by plasticity may take a large fraction, so that the Zener model, which ignores plasticity, will overestimate the coefficient of restitution (COR). In order to study how much the plasticity affects the sphere impacting the plate, we developed a modified Zener model by employing the contact plasticity into the controlling equation. Using the developed model, we firstly presented a thickness-dependent yielding velocity (yielding impact velocity depends on the thickness of the plate), above which the contact plasticity should be taken into account. What is more, we presented a semi-analytical solution to predict the COR over a large range of plate thickness. Meanwhile, finite element simulations were carried out to prove that the present model can give enough accuracy for the high velocity impact. (C) 2021 Elsevier Ltd. All rights reserved.
分类号	一类/力学重要期刊
资助项目	National Natural Science Foundation of China[12022210] ; National Natural Science Foundation of China[12032001] ; National Natural Science Foundation of China[11772334] ; National Natural Science Foundation of China[11890681] ; Youth Innovation Promotion Association CAS[2018022] ; Strategic Priority Research Program of the Chinese Academy of Sciences[XDB22040501]
WOS关键词	CONTACT ; MODEL ; WAVES
WOS研究方向	Mechanics
语种	英语
WOS记录号	WOS:000656157300010
资助机构	National Natural Science Foundation of China ; Youth Innovation Promotion Association CAS ; Strategic Priority Research Program of the Chinese Academy of Sciences
其他责任者	Liu, X.
内容类型	期刊论文
源URL	[http://dspace.imech.ac.cn/handle/311007/86928]
专题	力学研究所_非线性力学国家重点实验室
作者单位	1.Peking Univ, Coll Engn, Beijing 100871, Peoples R China 2.UCAS, Sch Engn Sci, Beijing 100049, Peoples R China; 3.Chinese Acad Sci, Inst Mech, LNM, Beijing 100190, Peoples R China;
推荐引用方式 GB/T 7714	Peng Q,Jin, Y.,Liu XM,et al. Effect of plasticity on the coefficient of restitution of an elastoplastic sphere impacting an elastic plate[J]. INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES,2021,222:11.
APA	彭青,Jin, Y.,刘小明,&魏悦广.(2021).Effect of plasticity on the coefficient of restitution of an elastoplastic sphere impacting an elastic plate.INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES,222,11.
MLA	彭青,et al."Effect of plasticity on the coefficient of restitution of an elastoplastic sphere impacting an elastic plate".INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES 222(2021):11.