Depth sensing indentation of linear Viscoelastic-plastic solids:A simple method to determine creep compliance

摘要：

Viscoelastic solids may derorm plastically under indentation.This leads to an overestimation of the creep compliance when the analytical solution for indentation of linear viscoelastic materials「Lu H.Wang B.Ma」,Huang G,Viswanathan H.Measurement of creep compliance of solid polymers by nanoindentation.Mech Time-Depend Mater 2003;7(3-4):189-207 is used for its determination.Using finite element analysis,in this work it is shown that the plastic and viscoelastic deformation processes occur simultaneously,even during holding of a constant indentation load.A simple procedure to separate the viscoelastic response from the plastic response iS proposed,which involves sphericaI indentations at different loads. To illustrate the proposed method, indentation tests are conducted on a polymer,polymethylmethacrylate(PMMA),and its viscoelastic properties are determined.

关键词： Indentation Finite element analysis Linear viscoelasticicy Plasticity

作者: Rocio Seltzer Yiu-Wing Mai

作者单位: Centre for Advanced Materials Technology(CAMT),School of Aerospace,MechanicalandMechatronic EngineeringJ07,The University of Sydney,Sydney,NSW2006,Australia

会议类型: 国际会议

会议名称: The Eighth International Conference on Fundamentals of Fracture(ICFF VIII)(第八届断裂基础国际会议)

会议地点: 香港·广州

会议语种:英文

页码: 4852-4862

在线出版日期: 2008-01-03（万方平台首次上网日期，不代表论文的发表时间）