The Accuracy in Prediction of Elastic Modulus of Elasto-plastic Materials by Spherical Indentation
Micro- or nano-indentation tests are commonly applied to determine mechanical properties of elastic-plastic materials at small scale.Spherical indenters have been popularly applied to numerically investigate indentation technique in order to avoid plastic deformation.The accuracy of the prediction of the elastic modulus by using the popular Field-Swain and Oliver-Pharr method for spherical indentation was investigated numerically.Results 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 phenomenon.Furthermore,the advantages of both Field-Swain and Oliver-Pharr methods were combined to improve the accuracy in prediction of elastic modulus.Finally,the modified method was numerically and experimentally validated.
spherical indentation pile-up sink-in elastic modulus finite element analysis
Qianhua Kan Guozheng Kang Wenyi Yan Han Jiang Yujie Liu
School of Mechanics and Engineering,Southwest Jiaotong University,Chengdu,China Department of Mechanical and Aerospace Engineering,Monash University,Clayton,Australia
国际会议
西安
英文
1-6
2012-10-01（万方平台首次上网日期，不代表论文的发表时间）