Sudharshan Phani Pardhasaradhi

Dr. Sudharshan Phani Pardhasaradhi

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Research Focus & Metrics

Academic Career Length

20Years (2007-Present)

(Calculated once Scilit publication data is synced: current year − year of first publication + 1)

Representative Publications

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30 June 2007 in Journal of Thermal Spray Technology
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Journal Article
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SPSudharshan Phani Pardhasaradhi
Sudharshan Phani Pardhasaradhi
DRD. Srinivasa Rao
D. Srinivasa Rao
SJS.V. Joshi
S.V. Joshi
GSG. Sundararajan
G. Sundararajan

1 May 2009 in Journal of Materials Science
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Journal Article
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GSG. Sundararajan
G. Sundararajan
SPSudharshan Phani Pardhasaradhi
Sudharshan Phani Pardhasaradhi
AJA. Jyothirmayi
A. Jyothirmayi
RGRavi C. Gundakaram
Ravi C. Gundakaram

9 March 2021 in Journal of Materials Research
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Journal Article
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SPSudharshan Phani Pardhasaradhi
Sudharshan Phani Pardhasaradhi
WOW. C. Oliver
W. C. Oliver
GPG. M. Pharr
G. M. Pharr

17 June 2017 in Materials
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Journal Article
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SPSudharshan Phani Pardhasaradhi
Sudharshan Phani Pardhasaradhi
WOWarren Oliver
Warren Oliver
Strain rate dependence of indentation hardness has been widely used to study time-dependent plasticity. However, the currently available techniques limit the range of strain rates that can be achieved during indentation testing. Recent advances in electronics have enabled nanomechanical measurements with very low noise levels (sub nanometer) at fast time constants (20 µs) and high data acquisition rates (100 KHz). These capabilities open the doors for a wide range of ultra-fast nanomechanical testing, for instance, indentation testing at very high strain rates. With an accurate dynamic model and an instrument with fast time constants, step load tests can be performed which enable access to indentation strain rates approaching ballistic levels (i.e., 4000 1/s). A novel indentation based testing technique involving a combination of step load and constant load and hold tests that enables measurement of strain rate dependence of hardness spanning over seven orders of magnitude in strain rate is presented. A simple analysis is used to calculate the equivalent uniaxial response from indentation data and compared to the conventional uniaxial data for commercial purity aluminum. Excellent agreement is found between the indentation and uniaxial data over several orders of magnitude of strain rate.

19 October 2022 in Journal of the Mechanics and Physics of Solids
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Journal Article
Closed access
SPSudharshan Phani Pardhasaradhi
Sudharshan Phani Pardhasaradhi
BHB.L. Hackett
B.L. Hackett
CWC.C. Walker
C.C. Walker
WOW.C. Oliver
W.C. Oliver
GPG.M. Pharr
G.M. Pharr

22 August 2017 in JOM
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Journal Article
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SPSudharshan Phani Pardhasaradhi
Sudharshan Phani Pardhasaradhi
WOW. C. Oliver
W. C. Oliver
GPG. M. Pharr
G. M. Pharr