The Accuracy in Prediction of Elastic Modulus of Elasto-plastic Materials by Spherical Indentation
作者单位：School of Mechanics and EngineeringSouthwest Jiaotong University Department of Mechanical and Aerospace EngineeringMonash University School of Mechanics and EngineeringSouthwest Jiaotong Universit
会议名称：《2012年海峡两岸破坏科学/材料试验学术会议》
会议日期：2012年
学科分类：08[工学] 080501[工学-材料物理与化学] 0805[工学-材料科学与工程（可授工学、理学学位）]
关 键 词：Spherical Indentation Pile-up Sink-in Elastic Modulus Finite Element Analysis
摘 要：Micro- or nano-indentation tests are commonly applied to determine mechanical properties of elastic-plastic materials at small *** indenters have been popularly applied to numerically investigate indentation technique in order to avoid plastic *** accuracy of the prediction of the elastic modulus by using the popular Field-Swain and Oliver-Pharr method for spherical indentation was investigated *** show that both methods exhibit significant depth-sensitive error in predicted elastic modulus of elastic-plastic materials due to the non-geometrical similarity of spherical indenter and pile-up ***,the advantages of both Field-Swain and Oliver-Pharr methods were combined to improve the accuracy in prediction of elastic ***,the modified method was numerically and experimentally validated.