Results 71 to 80 of about 204,727 (297)

Determination of mechanical properties of alloy steel 30Kh2SN2MFA according to the instrumented indentation results [PDF]

open access: yes, 2019
Проведено комплексні дослідження механічних властивостей легованої високоміцної сталі 30Х2СН2МФА з використанням методики інструментованого індентування.
Bisyk, Sergii   +15 more
core   +1 more source

Indentation by nominally flat or conical indenters with rounded corners [PDF]

open access: yesInternational Journal of Solids and Structures, 1999
Abstract Axisymmetric indentation of a flat surface is considered: specifically, the case of flat-ended indenter with rounded edges, and the case of a shallow cone with a rounded tip. Analytical solutions are obtained for the normal and sequential tangential loading, in both full or partial slip conditions (with the Cattaneo fn9 Mindlin approximation)
openaire   +3 more sources

Investigations of AE Signals Emitted From Dropped Indenter on Steel Pipes’ Surface

open access: yesIEEE Access, 2021
Acoustic emission (AE) are stress waves created by the material deformation, which could be utilized to detect impacts of objects within different mechanical systems.
Mohamed Shehadeh   +4 more
doaj   +1 more source

A method for measuring the contact area in instrumented indentation testing by tip scanning probe microscopy imaging [PDF]

open access: yes, 2014
The determination of the contact area is a key step to derive mechanical properties such as hardness or an elastic modulus by instrumented indentation testing. Two families of procedures are dedicated to extracting this area: on the one hand, post mortem
Charleux, L.   +5 more
core   +4 more sources

Extraordinary Indentation Strain Stiffening Produces Superhard Tungsten Nitrides.

open access: yesPhysical Review Letters, 2017
Transition-metal light-element compounds are a class of designer materials tailored to be a new generation of superhard solids, but indentation strain softening has hitherto limited their intrinsic load-invariant hardness to well below the 40 GPa ...
Cheng-Liang Lu   +3 more
semanticscholar   +1 more source

Investigation of Lower-limb Tissue Perfusion during Loading [PDF]

open access: yes, 2002
An extant tissue indentor used for amputee residual limb tissue indentation studies was modified to include laser Doppler flowmetry (LDF) to enable measurement of tissue perfusion during indentation.
Silver-Thorn, Barbara
core   +1 more source

On the determination of elastic moduli of cells by AFM based indentation

open access: yesScientific Reports, 2017
The atomic force microscopy (AFM) has been widely used to measure the mechanical properties of biological cells through indentations. In most of existing studies, the cell is supposed to be linear elastic within the small strain regime when analyzing the
Yue Ding, Guang-Kui Xu, Gang Wang
semanticscholar   +1 more source

Indenter Tip Radius and Micro-Indentation Hardness [PDF]

open access: yes, 2007
Using finite element method with the conventional J 2 theory and strain gradient theory respectively, the effect of the indenter tip radius on the micro-indentation hardness is investigated in the present paper. It is found that the former can not predict the size effect even considering the indenter tip radius, while the latter gives a good agreement ...
X. Y. Feng   +3 more
openaire   +2 more sources

The influence of indenter tip rounding on the indentation size effect [PDF]

open access: yesActa Materialia, 2010
Abstract A model was developed to interpret the indentation size effect (ISE). The model considers the tip wear effect, causing a rounded tip, the plastic zone size and various strengthening contributions, including geometrically necessary dislocations, pre-existing statistically stored dislocations and grain size.
Qiao, Xiaoguang   +2 more
openaire   +4 more sources

Research on Evolutionary Laws of Mechanical Properties and Pore Structure during CO2 Pre-Injection Fracturing in Shale Reservoirs

open access: yesEnergies
CO2 pre-injection fracturing is a promising technology for shale reservoirs development, with multiple advantages for improving the complexity of fractures, the production of crude oil, and the sequestration of CO2.
Jiaping Tao   +5 more
doaj   +1 more source

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