Date of Award
Summer 2010
Document Type
Thesis
Degree Name
Master of Science (MS)
Department
Mechanical & Aerospace Engineering
Program/Concentration
Mechanical Engineering
Committee Director
Abdelmageed A. Elmustafa
Committee Member
Gene J.-W. Hou
Committee Member
Sebastian Bawab
Call Number for Print
Special Collections; LD4331.E56 P73 2010
Abstract
The purpose of this work is to determine the strain rate sensitivity of the hardness in indentation creep and to investigate the relationship between the strain rate sensitivity of the hardness vH and the strain rate sensitivity of the flow stress vCT. A finite element model of nanoindentation creep was constructed and a parametric analysis was performed using Abaqus/Standard analysis software. It is found that the ratio vH / vCT does not maintain a unique relation with HIE• and varies with the increase in the ratio of depth of penetration to the radius of the indenter a/ R . Simulations were performed for a/ R = 0.01, 0.02, 0.03, 0.04, 0.05, 0.06, 0.1 and 0.15. At the value of a/ R = 0.15 the plot of vH /v CT against HIE• coincides with the theoretical master curve of conical indenter simulations. The effect of work hardening is analyzed due to the roundness of the spherical tip indenter. In the present analysis, we found the commonly held assumption that the area of the indent increases with the square of depth during constant load creep is violated.
Rights
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DOI
10.25777/y657-3y92
Recommended Citation
Praturi, Phani K..
"Nanoindentation Creep Analysis for A Spherical Indenter"
(2010). Master of Science (MS), Thesis, Mechanical & Aerospace Engineering, Old Dominion University, DOI: 10.25777/y657-3y92
https://digitalcommons.odu.edu/mae_etds/658
