G M Pharr
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Explore the profile of G M Pharr including associated specialties, affiliations and a list of published articles.
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Recent Articles
1.
Morris J, Bei H, Pharr G, George E
Phys Rev Lett
. 2011 May;
106(16):165502.
PMID: 21599381
A statistical model for pop in initiated at preexisting dislocations during nanoindentation is developed to explain size-dependent pop-in stresses. To verify theoretical predictions of this model, experiments were performed on...
2.
Bei H, George E, Hay J, Pharr G
Phys Rev Lett
. 2005 Aug;
95(4):045501.
PMID: 16090818
Nanoindentation with a Berkovich indenter is commonly used to investigate the mechanical behavior of small volumes of materials. To date, most investigators have made the simplifying assumption that the tip...
3.
Roy M, Nishimoto S, Rho J, Bhattacharya S, Pharr G
J Mater Sci Mater Med
. 2004 Sep;
12(8):699-702.
PMID: 15348241
This study examined the spatial distribution of selected biochemical and mechanical properties along the length of carp rib bone. Carp rib bone was chosen because of its unusually high osteocalcin...
4.
Rho J, Pharr G
J Mater Sci Mater Med
. 2004 Sep;
10(8):485-8.
PMID: 15348117
Effects of drying on the measurement of mechanical properties of bone by nanoindentation methods have been examined. Tests were conducted to measure the elastic modulus and hardness of two cross-sectional...
5.
Fan Z, Swadener J, Rho J, Roy M, Pharr G
J Orthop Res
. 2002 Aug;
20(4):806-10.
PMID: 12168671
The purpose of this study was to investigate the effects of elastic anisotropy on nanoindentation measurements in human tibial cortical bone. Nanoindentation was conducted in 12 different directions in three...
6.
Rho J, Mishra S, Chung K, Bai J, Pharr G
Ann Biomed Eng
. 2002 Feb;
29(12):1082-8.
PMID: 11853259
The nanoindentation technique was used to characterize the indentation modulus of intramuscular herring bone (Clupea harengus) along its length, from early to fully mineralized regions. Both the indentation modulus and...
7.
Rho J, Zioupos P, Currey J, Pharr G
J Biomech
. 2002 Jan;
35(2):189-98.
PMID: 11784537
The elastic modulus and hardness of secondary osteonal and interstitial bone was examined through the thickness of the cortex of human femora of various ages by nano-indentation. There was a...
8.
Roy M, Nishimoto S, Rho J, Bhattacharya S, Lin J, Pharr G
J Biomed Mater Res
. 2001 Jun;
54(4):547-53.
PMID: 11426600
Osteocalcin is one of the most abundant noncollagenous proteins in bone. It is strongly associated with the mineral phase of bone, and has long been associated as a marker of...
9.
Swadener J, Rho J, Pharr G
J Biomed Mater Res
. 2001 Jun;
57(1):108-12.
PMID: 11416856
Many biological materials are known to be anisotropic. In particular, microstructural components of biological materials may grow in a preferred direction, giving rise to anisotropy in the microstructure. Nanoindentation has...
10.
Rho J, Currey J, Zioupos P, Pharr G
J Exp Biol
. 2001 Apr;
204(Pt 10):1775-81.
PMID: 11316498
The equine radius is a useful subject for examining the adaptation of bone histology to loading because in life the anterior cortex is loaded almost entirely in tension, the posterior...