,POIR.01.01.01-00-0690/15,IV. Do badań odporności na czynniki powodujące korozję wybrano po jednej oprawce z poszczególnego rodzaju.,Badanie w rozpylonej solance wykonano w komorze solnej do testów korozyjnych SALT-CAB 150 (rys.V.1) wg EN ISO9227:2012. Rozpylano kwaśny roztwór solanki o stężeniu 5% z dodatkiem miedzi jako przyspieszacza (CASS) w temperaturze 50°C ± 2°C. Badanie w komorze przeprowadzono w czasie 48h, wskazanym w wymaganiach obejmujących dany przedmiot..,Do badania użyto urządzenia Power Clamp Comfort NG firmy Haimer (rys. IV.1). Oprawki nagrzewano do temperatury 350°C, a następnie chłodzono do temperatury otoczenia. Operację tą powtarzano dziesięciokrotnie. Wykonano 3 powtórzenia dla poszczególnych rodzajów oprawek niewyważanych.,V. Do badań odporności na czynniki powodujące korozję wybrano po jednej oprawce z poszczególnego rodzaju.,Badanie w rozpylonej solance wykonano w komorze solnej do testów korozyjnych SALT-CAB 150 (rys.V.1) wg EN ISO9227:2012. Rozpylano kwaśny roztwór solanki o stężeniu 5% z dodatkiem miedzi jako przyspieszacza (CASS) w temperaturze 50°C ± 2°C. Badanie w komorze przeprowadzono w czasie 48h, wskazanym w wymaganiach obejmujących dany przedmiot.,VI. Pomiar twardości oprawek dokonano metodą Rockvella, zgodnie z normą ISO 6508- 1:2002 za pomocą stacjonarnego twardościomierza Struers Duramin – 500,VII. Badania przeprowadzono zgodnie z normą PN-EN ISO 148-1:2010. Metale - próba udarności sposobem Charpy'ego - część1: metoda badania.,U = m×r [gmm],gdzie:,m – masa niewyważenia, r – promień,,

,Celem projektu było opracowanie i przeprowadzenie badań wentylatorów promieniowych dużej mocy wyposażonych w innowacyjne energooszczędne systemy regulacji w szerokim zakresie parametrów przepływowych takich jak wydajność, spiętrzenie, pobór mocy i sprawność.,

A collaborative study to compare the long-term measurement performance between guarded-hot-plate facilities at the Laboratoire national de métrologie et d'essais (LNE) in France and the National Institute of Standards and Technology (NIST) in the United States is presented. Thermal conductivity data were compiled from three international comparisons organized from 1997 to 2014. Measurements were conducted in accordance with standardized test methods (ISO 8302 or ASTM C 177) over a temperature range from 280 K to 320 K. Nine thermal insulating materials (either mineral fiber or expanded polystyrene) were examined covering broad ranges of bulk densities (13 kg/m3 to 200 kg/m3) and thicknesses (13 mm to 70 mm). A different set of specimens was utilized for each comparison. Results of this study indicate that, over a 17 year interval, the majority of test data from LNE and NIST agreed to within ±1.0%, or less, for mineral fiber materials and to within ±0.5%, or less, for expanded polystyrene. The long-term variability limit of 1% between the two laboratories is in good agreement with their current measurement uncertainties. Regression coefficients and their standard uncertainties for a straight-line model relating thermal conductivity to temperature from 280 K to 320 K were computed by material and laboratory. Graphical analysis of the data and corresponding fits exhibit consistent behavior by material type between the two laboratories. Sources of measurement variability are addressed. See also related: "Data from: Collaborative Guarded-Hot-Plate Tests between the National Institute of Standards and Technology and the National Physical Laboratory," accessible at https://doi.org/10.18434/M32106

고강도 생분해성 섬유 방사 공정 실험 정보 [개요] ㅇ 대상기간 : 2022~2024년 ㅇ 방사 공정 실험 정보 ㅇ PLA 장섬유 방사 실험(압출-방사-고화-권취) 온도 및 시간 등 [특징] ㅇ 방사, 열처리, 가공 공정에서의 온도, 시간, 압력 조건. 친환경 공정 도입 및 탄소 배출 저감 기술 [활용사례] [최적 공정 레시피 설계] ㅇ PLA 섬유의 방사 공정 최적화를 통해 대량 생산 공정 적용 가능성 검토 ㅇ 기존 합성 섬유 대비 취약한 가공성을 높이기 위한 압출·방사·고화 공정 개선

A bilateral study to compare guarded-hot-plate measurements at extended temperatures between laboratories at the National Institute of Standards and Technology (NIST) and the National Physical Laboratory (NPL) is presented. Measurements were conducted in accordance with standardized test methods (ISO 8302 or ASTM C177) over a temperature range from 20 °C to 160 °C (293 K to 433 K). Following a blind round-robin format, specimens of non-woven fibrous glass mat, approximately 22 mm thick and having a nominal bulk density of 200 kg/m3, were prepared and studied. Results of the study show that the thermal conductivity measurements agree over the temperature range of interest to within ±1.0 %, or less. See also related "Data from: Collaborative Guarded-Hot-Plate Tests between the Laboratoire national de métrologie et d'essais and the National Institute of Standards and Technology," accessible at https://doi.org/10.18434/T4XK5G

These measurements were performed as part of the 2018 Additive Manufacturing Benchmark Test Series (AM-Bench). This dataset and the associated experiments are part of a continuing series of controlled benchmark tests, in conjunction with a conference series, with two initial goals, 1) to allow modelers of Additive Manufacturing processes to test their simulations against rigorous, highly controlled additive manufacturing benchmark test data, and 2) to encourage additive manufacturing practitioners to develop novel mitigation strategies for challenging build scenarios. More information regarding the AMBench 2018 study can be found at www.nist.gov/ambench. For this year's challenge, numerous metal parts of the same geometry were created using an identical processing condition using a commercial powder bed fusion machine. The eight parts in total were manufactured in two builds. In situ thermal measurements of a select region on one of the parts within each build were acquired at 1800 frames per second. The part is a bridge structure geometry that has 12 legs of varying size (5 mm x 5 mm, 5 mm x 2.5 mm, and 0.5 mm x 5 mm), each leg is 5 mm tall, then uses a 45-degree overhang to transition into the bridge structure with a constant cross section. Each part is manufactured using 0.02 mm layer thickness, a programmed laser power of 195 W traveling at a scan speed of 800 mm/s, and the hatch spacing is 0.1 mm. The part is manufactured in 624 layers and the total build time nearly 9.5 hours. Details on the experiment can be found at www.nist.gov/ambench/amb2018-01-description, while related post-process measurement results can be found at www.nist.gov/ambench/benchmark-test-data.This dataset consists of thermal videos and MATLAB data structures for each layer. These are provided for each layer of the build and are grouped ten layers at a time in the provided zip files. The thermal videos provide an overview of the radiant temperature (not accounting for emissivity) measured during each layer, while the MATLAB structures contain the measurement data along with information on the camera timing, calibration, and process information. Two MATLAB functions are also provided. The first allows the measured radiant temperature to be converted into true temperature based on an assumed emissivity correction factor. The second function recreates the thermal video files. The second MATLAB function helps to provides context on how to interact with the MATLAB structures.For a detailed description of the dataset, please refer to the NIST Journal of Research publication, "Thermography of the Metal Bridge Structures Fabricated for the 2018 Additive Manufacturing Benchmark Test Series (AM-Bench 2018)." (in press)