نتایج جستجو برای: channel indentation

تعداد نتایج: 228510  

Journal: :Acta biomaterialia 2017
David Labonte Anne-Kristin Lenz Michelle L Oyen

The remarkable mechanical performance of biological materials is based on intricate structure-function relationships. Nanoindentation has become the primary tool for characterising biological materials, as it allows to relate structural changes to variations in mechanical properties on small scales. However, the respective theoretical background and associated interpretation of the parameters m...

2013
Qianhua Kan Wenyi Yan Guozheng Kang Qingping Sun

Instrumented indentation test has been extensively applied to study the mechanical properties such as elastic modulus of different materials. The Oliver–Pharr method to measure the elastic modulus from an indentation test was originally developed for single phase materials. During a spherical indentation test on shape memory alloys (SMAs), both austenite and martensite phases exist and evolve i...

2009
Takashi Yamamoto Masayuki Yamamoto Kensuke Miyahara Tatsuya Ishibashi

−A newly developed hardness test based on equivalent indentation depth is currently expected to be the only hardness test method that enables seamless evaluations of hardness across different hardness scales in all load ranges from nanoscopic to macroscopic in an industrial friendly manner because the new method is free from the shortcomings of the instrumented indentation method, which require...

2017
Vlad Cârlescu Dumitru N. Olaru Gheorghe Prisacaru Cezar Oprisan José Machado

In this paper, the authors present a new methodology to study the viscoelastic behaviour of the human finger. The methodology is based on experimental research consisting of a finger's indentation with a small steel cylindrical object for various indentation speeds. The tests were realized on a CETR UMT-2 Tribometer for indentation speed between 0.02 mm/s and 4 mm/s with a normal load of up to ...

Journal: :Investigative ophthalmology & visual science 2009
Rouzbeh Amini Victor H Barocas

PURPOSE To determine how mechanical interaction among iris, cornea, limbus, sclera, and IOP contribute to angle opening during indentation of the cornea or sclera. METHODS A finite-element model of the globe was developed. The model consisted of three elastic isotropic segments--iris, cornea, and sclera--and a two-component anisotropic segment representing the limbus. The model was tested aga...

2014
Jee Chin Teoh Bena Lim Taeyong Lee

Introduction Most in vivo indentation techniques are limited by the lack of adequate indentation on the plantar tissue. Without sufficient indentation into the soft tissue, only very little and less representative information can be obtained. The purpose of this study is hence to assess the effect of deformation depth on plantar tissue behavior and to establish a set rule of optimum indentation...

2001
J. Šafránková Z. Němeček

A number of magnetopause models have been developed in the course of last three decades. We have chosen seven of them and tested them using a fresh set of magnetopause crossings observed by Interball-1, Magion-4, and Geotail satellites. The crossings cover the magnetopause from the subsolar region up to near-Earth tail (XGSE ∼ −20 RE) and all geomagnetic latitudes. Our study reveals that (1) th...

2005
SHOUKAI WANG D. D. L. CHUNG

The interlaminar interface of a crossply carbon fiber epoxy-matrix composite was found to be an impact sensor, with sensitivity to impact from 0.8 mJ to 5 J (though no indentation was observed) and to multiple (up to 35) impacts at the same energy. However, the sensing of a small impact after a large one was not effective if the small impact was much lower in energy than the large one. The high...

M Hosseini S.M.R Khalili,

In this paper, static indentation and low velocity impact responses of a fully backed composite sandwich plate subjected to a rigid flat-ended cylindrical indenter/impactor are analytically investigated. The analysis is nonlinear due to nonlinear strain-displacement relation. In contrast to the existed analytical models for the indentation of composite sandwich plates, the stacking sequence of ...

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