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168 results for “Epoxy”
Data for: Low velocity impact resistance of thin and toughened carbon fibre reinforced epoxy
<p><em><strong>Version v2:</strong> <br></em>Added tiff-image stacks</p> <p><em><strong>Version v1:</strong><br></em>The data is supplementary to the publication "Low velocity impact resistance of thin and toughened carbon fibre reinforced epoxy", DOI: <a href="https://doi.org/10.1016/j.compscitech.2022.109362">10.1016/j.compscitech.2022.109362</a> as well as to the dissertation: "Morphology and Fracture of Block Copolymer and Core-Shell Rubber Particle Modified Epoxies and their Carbon Fibre Reinforced Composites", urn: <a href="https://nbn-resolving.org/urn:nbn:de:hbz:386-kluedo-63437">urn:nbn:de:hbz:386-kluedo-63437</a></p> <p>Key words: Polymer-matrix composites (PMCs), Impact behaviour, Low velocity impact, Barely visible impact damage, Damage tolerance, X-ray computed tomography, Fractography, Carbon fibre reinforced composite (CFRP)</p> <p>The data set is a collection of TXRM data of several low energy impact damages in CFRP specimens. The data was acquired via XCT (X-Ray Computed Tomography).</p> <p>Material details:</p> <ul> <li>Carbon fibre reinforced composite</li> <li>Thickness: ~ 1.65mm</li> <li>Matrix polymer: Epoxy-based (DGEBA): Sika CR144 + Anhydride curing agent (Huntsman Aradur917) + 1-Methylimidazole</li> <li>Carfon-fibre fabric: ECC Carbon fabric Style 763, based on Toho Tenax HTA40 E13, 140g/m²</li> <li>Layup: 13 layers, stacking sequence (45/-45/45/-45/90/0/90)s, (15% 0°/23% 90°/62% ± 45°) </li> <li>the average carbon fibre volume content was 52.5 ± 1.8 vol.-%</li> <li>cured ply-thickness: 126.1 μm</li> <li>Impact energies: 1J, 3J, 7J, 9J, 13J</li> <li>manufactured via autoclaving</li> </ul> <p>The reasearch received funding from the German Academic Exchange Service (DAAD) within the funding program “Kurzstipendien fuer Doktoranden” (grant number: 57438025).</p>
Confocal Microscopy Visualizes Particle-Crack Interactions in Epoxy Composites with Optical Force Probe-Crosslinked Rubber Particles
<p>Data (*.csv and *.lif) corresponding to Figures 2-7 of the manuscript and Figures S1-S2 of the Supporting Information.</p>
Fatigue properties of wind turbine rotor blade hybrid epoxy adhesives
<p>This dataset includes the tensile data at two different strain rates and tensile-tensile fatigue data of epoxy adhesives used in wind turbine rotor blades. SPABOND™ 820HTA (non-toughened) and SPABOND™ 840HTA (toughened) epoxy adhesives are combined at different weight proportions to develop the hybrid adhesives. The hybrid and ASTM D638-22 tensile specimen geometry (Type I and Type II) effects on fatigue performance are determined through instrumented experiments. </p>
Dataset for "Effect of particle contact on the electrical performance of NTC-epoxy composite thermistors"
<p>Datasets and code underpinning the publication entitled "Effect of particle connectivity on the electrical performance of NTC-epoxy composite thermistors", the SEM micrographs used to determine interparticle distances and the MATLAB code required to calculate the average interparticle distance of each micrograph.</p> <p>Pre-print article can be found at: <a href="https://arxiv.org/abs/1911.07468">https://arxiv.org/abs/1911.07468</a> </p> <p>Peer reviewed journal article can be found in <em>Materials Research Express</em> at: <a href="https://doi.org/10.1088/2053-1591/ab706d">https://doi.org/10.1088/2053-1591/ab706d</a> .</p>
Dataset and Jupyter worksheet interpreting the (results from) small- and wide-angle scattering data from a series of boehmite/epoxy nanocomposites. Accompanies the publication "Competition of nanoparticle-induced mobilization and immobilization effects on segmental dynamics of an epoxy-based nanocomposite"
<p>Dataset and Jupyter worksheet interpreting the (results from) small- and wide-angle scattering data from a series of boehmite/epoxy nanocomposites. Accompanies the publication "Competition of nanoparticle-induced mobilization and immobilization effects on segmental dynamics of an epoxy-based nanocomposite", by Paulina Szymoniak, Brian R. Pauw, Xintong Qu, and Andreas Schönhals.</p> <p>Datasets are in three-column ascii (processed and azimuthally averaged data) from a Xenocs NanoInXider SW instrument. Monte-Carlo analyses were performed using McSAS 1.3.1, other analyses are in the Python 3.7 worksheet. Graphics and result tables are output by the worksheet. </p>
FIGURE 5 in Comparison of methods: Micro-CT visualization method and epoxy cast-embedding reveal hidden details of bioerosion in the tube walls of Cretaceous polychaete worms
FIGURE 5. Pyrgopolon (Septenaria) cf. tricostata (Goldfuss, 1841), longitudinal section of a tube from Kaňk "Na Vrších", no. NM O8728. A. SEM image of the resulting cast providing a three-dimensional view of three bi-camerate specimens of Entobia isp. and numerous shafts of Trypanites isp. cut by the longitudinal boring Maeandropolydora isp.; galleries are duplicated, more or less parallel, partially touching each other. B. The same view to the specimen by using micro-CT. C. detail of the resin cast showing a pair of bi-camerate Entobia isp. D. micro-CT scan from the same view, details of Entobia chambers are below the lower limit of micro-CT resolution.
ANIMATION 1 in Comparison of methods: Micro-CT visualization method and epoxy cast-embedding reveal hidden details of bioerosion in the tube walls of Cretaceous polychaete worms
ANIMATION 1. Three-dimensional animation of specimen Cementula sp., a coiled tube, no. CZ2, from Velim locality, the Czech Republic.
FIGURE 3 in Comparison of methods: Micro-CT visualization method and epoxy cast-embedding reveal hidden details of bioerosion in the tube walls of Cretaceous polychaete worms
FIGURE 3. Cementula sp., a coiled tube, no. CZ2, from Velim. A–C. Scanning electron microscope images of resin cast, B–C insets in A showing microbioerosion beneath D–F. Micro-CT images. A, D and E. Identical views using different methods. B. SEM image of resin cast shows branching stolons of Iramena isp., below lower limit of micro-CT resolution. C. Detail showing microbioerosion beneath tube surface and shaft incompletely filled with epoxy resin. D. 2D section through both tubes. E. Semi-transparent rendering of 2D section. F. Volume reproduction image, 3D view to smooth inner surfaces of the tubes.
FIGURE 1. A in Comparison of methods: Micro-CT visualization method and epoxy cast-embedding reveal hidden details of bioerosion in the tube walls of Cretaceous polychaete worms
FIGURE 1. A. Simplified geographic map of Bohemian Cretaceous Basin indicating locations of the studied sites (in rectangle). B. Geographic position of nearshore deposits at Velim, Kaňk "Na Vrších" and Kamajka, where samples were taken (black pentangles).
FIGURE 4 in Comparison of methods: Micro-CT visualization method and epoxy cast-embedding reveal hidden details of bioerosion in the tube walls of Cretaceous polychaete worms
FIGURE 4. Placostegus zbyslavus (Ziegler, 1984), longitudinal section of a tube from Kamajka near Chotusice, no. NM O8727. A. SEM image of the resin cast showing a high degree of silicification that led to incomplete dissolution of the tube wall in HCl; image shows only indeterminate non-branching shafts. B. The same view of the specimen using micro-CT clearly shows relatively frequent Maeandropolydora isp. and shallow shafts of Trypanites isp.
FIGURE 2 in Comparison of methods: Micro-CT visualization method and epoxy cast-embedding reveal hidden details of bioerosion in the tube walls of Cretaceous polychaete worms
FIGURE 2. Stratigraphic provenance of serpulid tubes from Velim, Kamajka, and Kaňk. 1 - crystalline basement; 2 - basal Cenomanian conglomerate; 3 - redeposited Turonian conglomerate; 4 - bioclastic limestone with calcitic-clayey matrix; 5 - organodetritic clayey limestone; 6 - marly siltstone with intercalations of phosphatized horizon; 7 - sponge 'meadows'; 8 - limestone layer with nodule-like bodies; 9 - calcareous claystone (modified from Košťák et al., 2010; Kočí, 2012). Full filled circles indicate position of serpulid fauna.
ANIMATION 2 in Comparison of methods: Micro-CT visualization method and epoxy cast-embedding reveal hidden details of bioerosion in the tube walls of Cretaceous polychaete worms
ANIMATION 2. Three-dimensional animation of specimen Placostegus zbyslavus (Ziegler, 1984), from Kamajka locality, the Czech Republic, no. NM O8727.
Translaminar Fracture in a Mini-Protruded Compact Tension Specimen: A Dataset of Micro-Scale Tomograms of a Thin-Ply Carbon Fibre-Epoxy Composite acquired via Synchrotron Radiation Computed Tomography During In-Situ Loading
<p>In this study, we developed a scaled-down “mini-protruded compact tension specimen” to facilitate in-situ tensile testing coupled with synchrotron radiation computed tomography (SRCT). This innovative design provides valuable insights into in-situ translaminar damage mechanisms, significantly enhancing the accuracy of data used in finite element models.</p> <p>The specimen is made of HS40 carbon fibres and ThinPreg<sup>TM </sup>736LT epoxy resin, with the layup of [90<sub>2</sub>/0/90<sub>2</sub>/0/90<sub>2</sub>/0/90<sub>2</sub>]. The translaminar fracture experiments were conducted under continuous loading and scanning using ultra-fast SRCT at the Swiss Light Source (SLS) TOMCAT beamline (Paul Scherrer Institut in Villigen, Switzerland). A polychromatic beam with an energy of 24 keV was used. The achieved voxel size was 800 <em>nm</em>, and 1000 projections per scan and 2 <em>ms</em> exposure time were acquired per scan. The GigaFRoST camera served as the detector. The scans were reconstructed into 3D volumes using the SLS’s in-house absorption-based algorithm (Gridrec) for critical loading steps during a test—both before and after a load drop (detailed in the accompanying Excel file). The tensile loading was exerted on the specimen at a rate of 0.2 <em>mm/min</em> until failure during scanning with the Deben CT500.</p>
OBR-strain- and temperature-data of curing epoxy in moulds of different length
<p>These files contain the data/software that was obtained/used in a research project using an<br> Optical Backscatter Reflectometer (OBR) to obtain strain data of curing epoxy.</p> <p>Moulds of different length's were filled with liquid epoxy. In the middle of the epoxy, along the<br> longest axis of the mould, the optical fibre sensed the strain acting upon the fibre due to the<br> volume shrinkage.</p> <p>Additionally temperature probes were used to monitore the temperature in the epoxy.<br> For the 40 cm and the 60 cm experiments these probes were arranged along the fibre, for the<br> other experiments the probes were distributed randomly in the epoxy.</p> <p>Two Differential Scanning Calorimetry experiments were performed with temperature programs like the mean temperature of the 10 cm and the 60 cm curing experiments.</p> <p><br> See "001_Explanation of the data.txt" for a detailed description of the data.<br> Please, see the "*.txt"-files in the respective subfolders for additional information.</p> <p>ATTENTION: The archives that contain the raw-measurement files are several GB big. It may take a while to open these.</p> <p>The results are to be published and the journal/article-title will be added as soon as possible.</p> <p>The software is published under the GNU General Public License, version 3.<br> For the data the stated license is valid.</p>
Fig. 4 in Response to enantiomers of (Z3Z9)-6,7-epoxy-octadecadiene, sex pheromone component of Ectropis obliqua Prout (Lepidoptera: Geometridae): electroantennagram test, field trapping, and in silico study
Fig. 4. Pan trap catches of male Ectropis obliqua Prout baited with binary blends of racemic and enantiomers of Z3Z9-6,7-epo-18:Hy with triene in XianNing County, China. (A) Z3Z9-6S,7R-epoxy-18:H (6 μg) + Z3Z6Z9-18:H (4 μg); (B) Z3Z9-6R,7S-epoxy-18:H (6 μg) + Z3Z6Z9-18:H (4 μg); (C) blank lure (control). Data are mean ± SD (n = 8) of male E. obliqua trap catches in Xian-Ning County, China, May 2016 by 3 different combinations compared with water pan trap.
Fig. 1 in Response to enantiomers of (Z3Z9)-6,7-epoxy-octadecadiene, sex pheromone component of Ectropis obliqua Prout (Lepidoptera: Geometridae): electroantennagram test, field trapping, and in silico study
Fig. 1. Sex pheromone components of Ectropis obliqua Prout. (A) sex pheromone components; (B) enantiomers of Z3Z9-6,7-epo-18:Hy.
Fig. 5. Modeled 3D in Response to enantiomers of (Z3Z9)-6,7-epoxy-octadecadiene, sex pheromone component of Ectropis obliqua Prout (Lepidoptera: Geometridae): electroantennagram test, field trapping, and in silico study
Fig. 5. Modeled 3D structure and validation of EoblPBP1. (A) Sequence alignment of EoblPBP1 and template 1DQE_A. α-helices are displayed as squiggles. Identical residues are highlighted in white letters with deep blue background. (B) Overall structure of the EoblPBP1. Three disulfide bonds are in red. N-terminus, C-terminus, and α-helices are labeled. Two potential key residues: Thr117 and Arg 121 are in orange. (C) Ramachandran plot of EoblPBP1.
Experimental and simulation results of cure-induced strains for a cure study of an conventional epoxy resin
<p>Datasets of a number of case studies were investigated experimentally in an unconstrained setup. monitoring the temperature development and cure-induced shrinkage of an epoxy thermoset. Simulations using a 2D finite element thermomechanical model are used to elaborate on the thermal behaviour as well as the cure-induced strains seen experimentally for the cases provided. </p> <p>Please cite this folder of shared data and scripts alongside the original publication: <a href="https://doi.org/10.3390/polym16172435">doi.org/10.3390/polym16172435</a></p> <p>Cure cases published:</p> <p>C1 - [40_L]80_L</p> <p>C2 - [50_L]80_L</p> <p>C3 - [50_M]80_M</p> <p>C4 - [50_S70_S]80_M</p> <p>C5 - [50_S60_M]80_M</p> <p>C6 - [50_S60_L]80_M</p> <p>C7 - [50_S30_S]80_M</p> <p>C8 - [50_S30_M]80_M</p> <p> </p> <p>Model file: 1D_CASH.cae - This file contains the model with FE mesh and BC</p> <p>Python script: CASH_1D.py - This file contains the scripting, linking the cure profile with the model and other modifications necessary. The model calls the immediately important state-dependent variables (SDV) to the .odb file. The script then analyses the results from relevant nodal values and saves as an '_FEA_data.csv' file. </p> <p>CKP2_Submit.sh - Shell script for submitting jobs on a remote cluster if necessary. </p> <p> </p>
Fig. 2 in Response to enantiomers of (Z3Z9)-6,7-epoxy-octadecadiene, sex pheromone component of Ectropis obliqua Prout (Lepidoptera: Geometridae): electroantennagram test, field trapping, and in silico study
Fig. 2. Field trial of Ectropis obliqua Prout. (A) Water pan trap; (B) male moths captured.
Data for: Sequential trial-curing of off-stoichiometric amine-epoxy thermosets with ionic liquids
<p>Data for the journal paper "Sequential trial-curing of off-stoichiometric amine-epoxy thermosets with ionic liquids".</p>
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