scholarly journals Determination of tensile behavior of hot-pressed Mg-TiO2 and Mg-ZrO2 nanocomposites using indentation test and a holistic inverse modeling technique

2021 ◽  
Author(s):  
Kaveh Rahmani ◽  
Alireza Nouri ◽  
Greg Wheatley ◽  
Hossein Malekmohammadi ◽  
Hamed Bakhtiari ◽  
...  
Keyword(s):  
Inverse Modeling ◽  
Indentation Test ◽  
Tensile Behavior ◽  
Modeling Technique

scholarly journals Top-down estimate of methane emissions in California using a mesoscale inverse modeling technique: The San Joaquin Valley

2017 ◽  
Vol 122 (6) ◽  
pp. 3686-3699 ◽  
Author(s):  
Yu Yan Cui ◽  
Jerome Brioude ◽  
Wayne M. Angevine ◽  
Jeff Peischl ◽  
Stuart A. McKeen ◽  
...  
Keyword(s):  
Inverse Modeling ◽  
Methane Emissions ◽  
San Joaquin Valley ◽  
Modeling Technique ◽  
Top Down

Determination of mechanical properties of the weld line by combining micro-indentation with inverse modeling

2014 ◽  
Vol 85 ◽  
pp. 347-362 ◽  
Author(s):  
Guangyong Sun ◽  
Fengxiang Xu ◽  
Guangyao Li ◽  
Xiaodong Huang ◽  
Qing Li
Keyword(s):  
Mechanical Properties ◽  
Inverse Modeling ◽  
Weld Line ◽  
Micro Indentation

The Determination of Stress-Strain Curves of Thin Layers Using Indentation Tests

1986 ◽  
Vol 108 (3) ◽  
pp. 230-232 ◽  
Author(s):  
A. G. Tangena ◽  
G. A. M. Hurkx
Keyword(s):  
Finite Element ◽  
Indentation Test ◽  
Thin Layers ◽  
Finite Element Calculation ◽  
Element Calculation ◽  
Plastic Part ◽  
Stress Strain ◽  
Metal Coatings ◽  
Indentation Tests

A method is presented for estimating the plastic part of stress-strain curves of metal coatings, using a Brinell indentation test. The accuracy of the stress-strain curves obtained in this way is tested by using these curves in a finite element calculation and comparing the calculated results with results from experiments. Stress-strain curves are given for galvanic layers such as citrate Au, Co-Au, sulfamate Ni and also for solid annealed pure Au.

Determination of Poisson’s Ratio by Spherical Indentation Using Neural Networks—Part I: Theory

2000 ◽  
Vol 68 (2) ◽  
pp. 218-223 ◽  
Author(s):  
N. Huber ◽  
A. Konstantinidis ◽  
Ch. Tsakmakis
Keyword(s):  
Poisson Ratio ◽  
Indentation Test ◽  
Inverse Function ◽  
Elastic Half Space ◽  
Spherical Indentation ◽  
Isotropic Hardening ◽  
Plastic Yield ◽  
Load Response ◽  
Reduced Modulus

When studying analytically the penetration of an indenter of revolution into an elastic half-space use is commonly made of the fraction Er=E/1−ν2. Because of this, only Er is determined from the indentation test, while the value of ν is usually assumed. However, as shown in the paper, if plastic deformation is involved during loading, the depth-load trajectory depends on the reduced modulus and, additionally, on the Poisson ratio explicitly. The aim of the paper is to show, with reference to a simple plasticity model exhibiting linear isotropic hardening, that the Poisson ratio can be determined uniquely from spherical indentation if the onset of plastic yield is known. To this end, a loading and at least two unloadings in the plastic regime have to be considered. Using finite element simulations, the relation between the material parameters and the quantities characterizing the depth-load response is calculated pointwise. An approximate inverse function represented by a neural network is derived on the basis of these data.

A Review of the Estimation Methodology of Methane Emission in a Landfill using Inverse Modeling Technique

2013 ◽  
Vol 12 (3) ◽  
pp. 111-123 ◽  
Author(s):  
Youn-Seo Koo ◽  
◽  
Hee-Yong Kwon ◽  
Eun-Sung Son ◽  
Hyun-jin Jin ◽  
...  
Keyword(s):  
Methane Emission ◽  
Inverse Modeling ◽  
Modeling Technique

scholarly journals Determination of an Objective Criterion for the Assessment of the Feasibility of an Instrumented Indentation Test on Rough Surfaces

Materials ◽  
2020 ◽  
Vol 13 (7) ◽  
pp. 1589
Author(s):  
Julie Marteau ◽  
Abdeljalil Jourani ◽  
Maxence Bigerelle
Keyword(s):  
Fractal Dimension ◽  
Indentation Test ◽  
Roughness Parameters ◽  
Instrumented Indentation ◽  
Objective Criterion ◽  
Pass Filter ◽  
Maximum Indentation Depth ◽  
High Pass ◽  
Instrumented Indentation Test

The influence of roughness on the results of indentation testing was investigated using a semianalytical model. This model used simulated surfaces that were described using three standard roughness parameters: the root-mean-square deviation Sq, the wavelength (or cut-off of Gaussian high-pass filter), and the fractal dimension. It was shown that Sq had the largest effect on the determination of the macrohardness, while the surface wavelength and fractal dimension had negligible effects at the scale of investigation. The error of determination of the macrohardness rose with the increase of the ratio Sq/hmax where hmax was the maximum indentation depth: Sq/hmax ratios lower than 0.02 were required to obtain a systematic error of the macrohardness lower than 5%, whatever the examined material mechanical properties (in elasticity and plasticity).

scholarly journals Wintertime CO2, CH4, and CO Emissions Estimation for the Washington, DC–Baltimore Metropolitan Area Using an Inverse Modeling Technique

2020 ◽  
Vol 54 (5) ◽  
pp. 2606-2614 ◽  
Author(s):  
Israel Lopez-Coto ◽  
Xinrong Ren ◽  
Olivia E. Salmon ◽  
Anna Karion ◽  
Paul B. Shepson ◽  
...  
Keyword(s):  
Metropolitan Area ◽  
Inverse Modeling ◽  
Modeling Technique ◽  
Washington Dc ◽  
Baltimore Metropolitan Area
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