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47 results for “compression testing”
Datasets to "Compressible test-field method and its application to shear dynamos"
<pre>This directory contains an index.html file with links to the run directories and idl plotting routines with secondary data for the other figures for the paper "Compressible test-field method and its application to shear dynamos" by M. J. Kapyla, M. Rheinhardt, & A. Brandenburg (Astrophys. J., in press, arXiv:2106.01107). If anything turns out to be incomplete, please email maarit.kapyla@aalto.fi or brandenb@nordita.org. </pre>
Compression tests and direct shear test of two types of railway ballast
<p>This data set contains measurement data from uniaxial compression tests and direct shear tests<br> conducted on two types of railway ballast.<br> For a detailed description of the experiments see:</p> <p>B. Suhr, S. Marschnig and K. Six:<br> "Comparison of two different types of railway ballast in compression and direct shear tests:<br> experimental results and DEM model validation"<br> Granular Matter (2018)<br> Doi: 10.1007/s10035-018-0843-9</p> <p>For the uniaxial compression tests, measured normal forces and vertical paths are provided.<br> The direct shear tests are conducted directly afterwards, i.e. the information for<br> one compression and one shear test are contained in only one file.<br> For the shear tests shear paths, shear forces and vertical path are provided.</p> <p>At first the uniaxial compression test is carried out. At the end of this test, the normal load is equal to zero.<br> For the following direct shear test, the normal load is constant (according to the load specified in the file name)<br> and not recorded in the file.<br> The direct shear test starts, when the measured shear path is greater than zero.</p> <p>Check the README.txt file for more information. </p>
PHASTA compressible test case for two processes
<p>Input files and execution instructions for a PHASTA compressible flow case using two processes. The expected results are included in the included README.md.</p>
DocumeNDT Uniaxial Compression Strength (UCS) tests dataset
<p>DocumeNDT Uniaxial Compression Strength (UCS) Tests dataset</p> <p>This repository contains the raw data obtained from the Uniaxial Compression Strength (UCS) tests performed on six stone masonry walls at the laboratory of the Eduardo Torroja Institute for Construction Sciences (IETCC), from the Spanish National Research Council (CSIC).</p> <p>The data set is structured in 6 folders corresponding to the 6 tested stone masonry walls (Walls 1-6). Each folder contains:<br> (1) Position of each LVDT during the test (plan view "PositionLVDTs.jpg)<br> (2) Elevations A and B (long sides), marked in plan<br> (3) Recorded force and displacement data (*.csv file)<br> (4) readme file with specific details about the test</p> <p>Raw data (force and displacement) is provided in .csv files, structured in columns. First column corresponds to the Force measured (in kN) and columns 2-5 correspond to the displacement measured by each LVDT (in mm).</p> <p>The frequency of acquisition is 1 samples/s.</p> <p>The detailed geometry of all walls (including the inner position of each stone) is publicly available and can be found in https://doi.org/10.5281/zenodo.7713700</p> <p>Please cite the following related publication:</p> <p>Ortega J, Meersman MFL, Aparicio S, Liébana JC, Anaya JJ, Gonzalez M. Capabilities of sonic tomography to assess historic masonry deformability properties, in situ stress level and damage evolution (2023)</p>
DocumeNDT Uniaxial Compression Strength (UCS) tests – tomographic inspections dataset
<p>DocumeNDT Uniaxial Compression Strength (UCS) Tests - tomographic inspections dataset</p> <p>This repository contains data from the sonic tomography inspections carried out during the cyclic Uniaxial Compression Strength (UCS) tests performed on six stone masonry walls at the laboratory of the Eduardo Torroja Institute for Construction Sciences (IETCC), from the Spanish National Research Council (CSIC). </p> <p>A first sonic tomography inspection was carried out before starting the test (C0) with no loading. Then, cycles of increasing loading were imposed to the wall. Two cycles are performed for each loading level. After reaching the maximum load in each cycle, the load is sustained and a sonic tomography inspection is carried out. </p> <p>The data set is structured in 3 levels of folders:<br> - At first level, the 6 folders correspond to the 6 tested stone masonry walls (Wall 1-6).<br> - At second level, for each wall, there are two folders and a readme file:<br> - The readme file contains specific details about the inspection, e.g., number of emission and reception points or maximum load corresponding to each cycle<br> - The folder 'Coordinates' contains two diagrams of the emission and reception locations in elevation<br> - The folder 'Loading Cycles' contains the sonic raw data recorded in each cycle<br> - At third level, for each loading cycle carried out during the UCS test, there is one folder. Each folder contains:<br> - The folder 'Coordinates' contains the exact coordinates of the emission and reception points in *.txt files<br> - The folder 'Emission raw signal' contains the recorded emission signal for each emission location<br> - The folder 'Reception raw signal' contains the recorded reception signal for each emission location</p> <p>Sonic data are presented in *.csv files, structured in columns. Each column correspond to a reception location. The values correspond to the voltage recorded. Specific details about the csv can be found in the readme file of each wall.</p> <p>The frequency of acquisition is 256000 samples/s.</p> <p>The detailed geometry of all walls (including the inner position of each stone) is publicly available and can be found in https://doi.org/10.5281/zenodo.7713700</p> <p>The experimental results of the UCS test are also publicly available and can be found in https://doi.org/10.5281/zenodo.8341725. </p> <p>Please cite the following related publication:</p> <p>Ortega J, Meersman MFL, Aparicio S, Liébana JC, Anaya JJ, Gonzalez M. Capabilities of sonic tomography to assess historic masonry deformability properties, in situ stress level and damage evolution (2023)</p>
Data Accompanying "Fracturing process of concrete under uniaxial and triaxial compression: insights from in-situ x-ray mechanical tests"
<p>These are the datasets analysed in "Fracturing process of concrete under uniaxial and triaxial compression: insights from <em>in-situ</em> x-ray mechanical tests" by Stamati <em>et. al.</em> (submitted on June 2020 in Cement and Concrete Research)</p> <p>The datasets contain the reconstructed x-ray 3D images of selected tests and the corresponding DVC analysis.</p> <p>Note that details regarding the DVC analysis can be found in the paper.</p> <ul> <li>Each folder contains a separate test; uniaxial compression ("<em>C-02"</em>) and triaxial compression at 5MPa ("<em>TX5-01"</em>), 10MPa ("T<em>X10-01</em>") and 15MPa ("<em>TX15-01</em>") confining pressures.</li> <li>For each test, folder 01 contains the first scan, where 01 is the reference state for the DVC analyis. Folder 01 also contains the image of the labelled largest aggregates used for the discrete DVC. Folrders 02-XX contain the scans at intermediate loading steps and the corresponding DVC analysis; "<em>reg</em>" contains the registration result in downscaled 2-binning images. "<em>ddic</em>" contains the discrete DVC computation. "<em>ldic</em>" contains the local DVC computation, before and after the merge and filtering of the grid and discrete DVC fields. "<em>strains</em>" contains the strain fields coming from the corrected merged DVC field.</li> <li>Folder "<em>stressStrain</em>" contains the stress-strain curves measured during the tests after subtracting the displacement corresponding to the loading system.</li> <li>Folder "<em>doubleScanUniaxial</em>" contains the two reconstructed images of the "repeated scan" of the uniaxial tests, from which the DVC measurement uncertainties were evaluated.</li> </ul>
Dataset: Quasi-static shear-compression tests on stone masonry walls with plaster: Influence of load history and axial load ratio
<p>This repository contains the results of six quasi-static cyclic shear-compression tests performed on single-leaf stone masonry walls made of limestone blocks and lime-based mortar joints. Of the six walls, four are tested under different axial load ratios, performing a cyclic load history with two cycles per increasing drift demand. Three are tested under the same axial load ratio but are subjected to different load histories, namely, one monotonic loading, one cyclic loading with two cycles per drift level and one cyclic loading with one hundred cycles per drift level.</p> <p>Results and details of the tests are reported in:</p> <blockquote> <p>Godio M, Vanin F, Zhang S, Beyer K (2019). “Quasi-Static Shear-Compression Tests on Stone Masonry Walls with Plaster: Influence of Load History and Axial Load Ratio.” Engineering Structures 192: 264–78. <a href="https://doi.org/10.1016/j.engstruct.2019.04.041">https://doi.org/10.1016/j.engstruct.2019.04.041</a> </p> </blockquote>
Quasi-static cyclic shear-compression tests on plastered rubble stone masonry walls - Experimental data
<p>This dataset contains quasi-static cyclic shear-compression tests on six large-scale rubble stone masonry walls plus two example point clouds created from two specimens.</p> <p> </p>
Cyclic tensile-compressive tests on thin concrete boundary elements with a single layer of reinforcement prone to out-of-plane instability
<p>The growing need for residential housing in Latin American countries has led to the construction of reinforced concrete buildings with wall thicknesses as low as 8-10 cm. Such walls have typically only a single layer of vertical rebars and are therefore particularly susceptible to out-of-plane failure. To investigate the response of the corresponding wall boundary elements, twelve reinforced concrete columns with a single layer of vertical rebars were tested under tension-compression cycles. The objective of this test series was to gain insights into parameters triggering wall instability and out-of-plane failure. The experimental tests investigate the effect of thickness, reinforcement ratio, and eccentricity of the longitudinal rebars with respect to the element axis. This paper summarises the results of the test campaign. The specimen response is analysed at the global and local level, and the influence of the crack pattern on the out-of-plane response of the column and the conditions leading to out-of-plane failure are described. Furthermore, the differences between members with a single layer of vertical rebars to members with two layers are discussed. The influence on the response of the parameters analysed in the experimental campaign is addressed, showing that section with small thickness and large reinforcement content are more prone to out-of-plane failures. Finally, the predictions of existing models are compared to the new experimental data. The entire data set is publically available.</p>
Supporting information for: Discrimination ability of central visual field testing using stimulus size I, II, and III and relationship with macular ganglion cell thickness in chiasmal compression
<p><strong>Purpose</strong><strong>: </strong>To compare the relationship between macular ganglion cell layer (mGCL) thickness and 10-2 visual field (VF) sensitivity using different stimulus sizes in patients with temporal hemianopia from chiasmal compression.</p> <p><strong>Methods:</strong><strong> </strong>A cross-sectional study was conducted involving 30 eyes from 25 patients with temporal VF loss on 24-2 SITA standard automated perimetry due to previous chiasmal compression and 30 healthy eyes (23 controls). Optical coherence tomography (OCT) of the macular area and 10-2 VF testing using Goldmann stimulus size I (GI), II (GII), and III (GIII) were performed in the Octopus 900 perimeter. For the sake of analysis, mGCL thickness and VF data were segregated into four quadrants (two temporal and two nasal) and two halves (temporal and nasal) centered on the fovea, and the groups were compared using generalized estimated equations. The discrimination ability of GI, GII, and GIII was evaluated, as was the correlation between mGCL and 10-2 VF sensitivity using GI, GII, and GIII. </p> <p><strong>Results:</strong><strong> </strong>All mGCL parameters were significantly reduced in patients compared to controls. 10-2 VF test sensitivity using GI, GII, and GIII was significantly lower in patients than in controls (p≤0.008) for all parameters, except the three nasal divisions when using GI (p=0.41, 0.07 and 0.18) Significant correlations were found between temporal VF sectors (all stimulus sizes) and the corresponding nasal mGCL measurements, with similar discrimination ability. Significant correlations were also observed between all three nasal VF divisions and the corresponding temporal mGCL thickness when using stimulus sizes I and II, but not stimulus size III.</p> <p><strong>Conclusions</strong><strong>:</strong> On 10-2 VF testing, GII outperformed GI and GIII with regard to discrimination ability and structure-function correlation with mGCL thickness in chiasmal compression. Our findings suggest that the use of GII can enhance the diagnostic power of 10-2 VF testing, although further studies are necessary to support this conclusion.</p>
Compression test results of asphalt samples
<p><span>The record contains 7 files, each file contains the results of a strained controlled compression test performed on asphalt samples. The tests were carried out at different temperatures, with varying strain rates, and some of them have unloading-reloading cycles too. </span></p>
Supporting information for: Discrimination ability of central visual field testing using stimulus size I, II, and III and relationship with macular ganglion cell thickness in chiasmal compression
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Results of Room temperature compression tests
<p>The results of room temperature compression tests carried out on porous H-X alloys</p>
Abdominal and Lower Extremity Compression During Tilt Table Testing in Adolescent POTS Patients
ClinicalTrials.gov study NCT01795469. IPD Sharing: Not stated. Countries: 1. Publications: 1.
Original data of compression test for cracked specimen
<p>To explore the crack propagation and failure process of surrounding rock with deep cracks under external stress adjustment, the failure of cracked specimens under external load was studied. The required test pieces were prepared by using a self-developed mold and using cement mortar as a similar material. Through the uniaxial compression test, the basic mechanical properties of the material and the specimen were obtained, and the crack propagation process and the failure evolution mechanism of the specimen under different crack inclination angles and loading rates were revealed. The test results show that the presence of cracks can significantly affect the overall strength of the specimen, and the strength and failure mechanism of the specimen vary with the change in the crack angle and rate of loading. The larger the crack inclination angle, the lower the strength of the specimen, and the two are linearly related. With the increase in the loading rate, the failure mode of the specimen gradually changes, the dynamic effect is enhanced, and typical characteristics of a rockburst appear. Furthermore, the reasons for the modes of failure and changes in strength of the specimens were analyzed from the energy point of view, and the non-contact full-field strain measurement system (DIC) was used to explain the macroscopic failure modes of the specimens from a meso-level perspective. Combining this with the failure behavior of the specimen, reasonable suggestions are proposed for the smooth construction of the actual project in the later stage.</p>
Test database for bearing capacity of circular concrete-filled steel tube (CFST) under axial compression, eccentric compression, and pure bending stress states
<p><span>The constitutive relations and failure criterion were developed for circular concrete-filled steel tube (CFST) with high precision and wide applicability based on the fiber model method to overcome the limitations of existing constitutive relations and failure criteria</span> <span>for circular CFST </span><span>flexural</span><span> members</span><span>.</span><span> Then,</span><span> on the basis of </span><span>the test database including the parameters of circular CFST such as "length", "Diameter", "Thickness", "Yield strength", and "Compressive strength",</span><span> the bearing capacity was calculated by the fiber model method. Finally, </span><span>the accuracy and validity of the proposed constitutive relations and failure criterion were verified </span><span>by comparing the calculated values with the "Test values" of the </span><span>test database</span><span>.</span></p> <p><span>The test database consists of three tables. Table 1 is the axial compression test database, containing a total of 516 data sets. Table 2 is the pure bending test database, comprising 121 data sets. Lastly, Table 3 is the flexural compression test database, encompassing 365 data sets.</span></p>
Original data of compression test for cracked specimen
Open the record for dataset details and reuse information.
Test database for bearing capacity of circular concrete-filled steel tube (CFST) under axial compression, eccentric compression, and pure bending stress states
Open the record for dataset details and reuse information.
Balloon Test for Iliac Vein Compression
ClinicalTrials.gov study NCT02584374. IPD Sharing: Not stated. Countries: 1. Publications: 0.
Clinical Applications for Time-Compressed Speech Tests
ClinicalTrials.gov study NCT00371839. IPD Sharing: Not stated. Countries: 0. Publications: 0.
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