Characterization of transverse anisotropy in Poisson’s ratio using three-point radial deformation measurements

Download

e3sconf_isg2019_02006.pdf

Date

2019-06-26

Author

Toker, Nabi Kartal

Metadata

Show full item record

This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Item Usage Stats

61
views

81
downloads

Poisson's ratio (v) of rock specimens can be experimentally determined from radial deformation measurements in an unconfined compression test. This is commonly achieved by mounting a compressometer with diametric or perimetric measurement capability, both of which assume the specimen cross-section remains a circle. If there is anisotropy among the horizontal directions, this assumption fails and measurements err. In this study, a compressometer with three radial deformation measurements is developed. The accuracy of new compressometer in determining the mean of the two v values along the two axes of anisotropy is theoretically investigated, assuming the deformed specimen is an ellipse in cross-section. Then, to capture separate v values along the axes of anisotropy, data from actual tests employing the new device were analysed in two different approaches: Assuming the centroid of the cross-section remains stationary (1) does not produce physically reasonable results. Assuming the specimen moves laterally and v values are constant (2) is possible through a grid search-type optimization algorithm. This results in calculation of the orientation of axes of anisotropy with respect to the compressometer, as well as the corresponding v value.

URI

https://hdl.handle.net/11511/69542

DOI

https://doi.org/10.1051/e3sconf/20199202006

Collections

Department of Civil Engineering, Conference / Seminar

Suggestions

OpenMETU
Core

Determination of dilute slurry densities in a vertical annulus using isokinetic sampling Camci, Gülden; Özbelge, Tülay A. (Informa UK Limited, 2006-01-01) Local solids densities (concentrations) at a test cross section of a concentric annulus in the fully developed flow region were measured by using an isokinetic sampling technique during upward flow of water-feldspar slurries. As solids, 72 or 138 mu m feldspar particles at an average concentration of 1 or 2% v/v (volume of solids/volume of vessel) were used in the feed slurry. The amounts of solids in the collected slurry samples from different radial locations were determined by a gravimetric method (Ozbel...
Measurement of the rapidity and transverse momentum distributions of Z bosons in pp collisions at root(s)=7 TeV Chatrchyan, S.; et. al. (2012-02-01) Measurements of the normalized rapidity (y) and transverse-momentum (q(T)) distributions of Drell-Yan muon and electron pairs in the Z-boson mass region (60 < M-ll < 120 GeV) are reported. The results are obtained using a data sample of proton-proton collisions at a center-of-mass energy of 7 TeV, collected by the CMS experiment at the Large Hadron Collider (LHC), corresponding to an integrated luminosity of 36 pb(-1). The distributions are measured over the ranges vertical bar y vertical bar < 3.5 and q(T)...
Processing by electrospinning method and characterization of poly(lactic acid) and poly(lactic acid)-based composite nanofibers Aşcı, Emine Ümran; Bayram, Göknur; Department of Chemical Engineering (2022-6) Electrospinning method is a versatile, cost-effective and viable technique to produce nanofibers with high ratios of surface area to the volume. The ability to obtain characteristics of the nanofibers via electrospinning, i.e., small pore size, high porosity and surface area/volume ratio, are some of the significant reasons why this method has eventually become a widespread technique for developing continuous and long fibers with nanometer-scale diameters. Furthermore, these advantages enable the produced n...
Observation of Spin Correlation in t(t)over-bar Events from pp Collisions at root s=7 TeV Using the ATLAS Detector Aad, G.; et. al. (2012-05-24) A measurement of spin correlation in t (t) over bar production is reported using data collected with the ATLAS detector at the LHC, corresponding to an integrated luminosity of 2.1 fb(-1). Candidate events are selected in the dilepton topology with large missing transverse energy and at least two jets. The difference in azimuthal angle between the two charged leptons in the laboratory frame is used to extract the correlation between the top and antitop quark spins. In the helicity basis the measured degree ...
Measurement of the top quark pair production cross-section with ATLAS in the single lepton channel Aad, G.; et. al. (Elsevier BV, 2012-05-15) A measurement of the production cross-section for top quark pairs (t (t) over bar) in pp collisions at root s = 7 TeV is presented using data recorded with the ATLAS detector at the Large Hadron Collider. Events are selected in the single lepton topology by requiring an electron or muon, large missing transverse momentum and at least three jets. With a data sample of 35 pb(-1), two different multivariate methods, one of which uses b-quark jet identification while the other does not, use kinematic variables ...

Citation Formats

N. K. Toker, “Characterization of transverse anisotropy in Poisson’s ratio using three-point radial deformation measurements,” 2019, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/69542.