Journal of Research of the National Institute of Standards and Technology最新文献_第6页

Linking Theory to Practice: Predicting Ballistic Performance from Mechanical Properties of Aged Body Armor. 理论联系实际:从老化防弹衣的力学性能预测弹道性能

IF 1.3 4区工程技术

Journal of Research of the National Institute of Standards and Technology Pub Date : 2020-08-24 eCollection Date: 2020-01-01 DOI: 10.6028/jres.125.026

Amanda L Forster, Dennis D Leber, Amy Engelbrecht-Wiggans, Virginie Landais, Allen Chang, Emilien Guigues, Guillaume Messin, Michael A Riley

{"title":"Linking Theory to Practice: Predicting Ballistic Performance from Mechanical Properties of Aged Body Armor.","authors":"Amanda L Forster, Dennis D Leber, Amy Engelbrecht-Wiggans, Virginie Landais, Allen Chang, Emilien Guigues, Guillaume Messin, Michael A Riley","doi":"10.6028/jres.125.026","DOIUrl":"10.6028/jres.125.026","url":null,"abstract":"It has long been a goal of the body armor testing community to establish an individualized, scientific-based protocol for predicting the ballistic performance end of life for fielded body armor. A major obstacle in achieving this goal is the test methods used to ascertain ballistic performance, which are destructive in nature and require large sample sizes. In this work, using both the Cunniff and Phoenix-Porwal models, we derived two separate but similar theoretical relationships between the observed degradation in mechanical properties of aged body armor and its decreased ballistic performance. We present two studies used to validate the derived functions. The first correlates the degradation in mechanical properties of fielded body armor to the degradation produced by a laboratory accelerated-aging protocol. The second examines the ballistic resistance and the extracted-yarn mechanical properties of new and laboratory-aged body armor made from poly(p-phenylene-2,6-benzobisoxazole), or PBO, and poly(p-phenylene terephthalamide), or PPTA. We present correlations found between the tensile strengths of yarns extracted from armor and the ballistic limit (V50) when significant degradation of the mechanical properties of the extracted yarns was observed. These studies provided the basis for a validation data set in which we compared the experimentally measured V50 ballistic limit results to the theoretically predicted V50 results. The theoretical estimates were generally shown to provide a conservative prediction of the ballistic performance of the armor. This approach is promising for the development of a tool for fielded armor performance surveillance relying upon mechanical testing of armor coupon samples.","PeriodicalId":54766,"journal":{"name":"Journal of Research of the National Institute of Standards and Technology","volume":null,"pages":null},"PeriodicalIF":1.3,"publicationDate":"2020-08-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10883353/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42025172","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A Toolbox for Isophase-Curvature Guided Computation of Metrology Hologram. 计量全息图等相曲率导向计算工具箱

IF 1.3 4区工程技术

Journal of Research of the National Institute of Standards and Technology Pub Date : 2020-08-13 eCollection Date: 2020-01-01 DOI: 10.6028/jres.125.024

Ulf Griesmann, Johannes A Soons, Gufran S Khan

引用次数: 0

Construction of a Dual Protease Column, Subzero (-30 °C) Chromatography System and Multi-channel Precision Temperature Controller for Hydrogen-Deuterium Exchange Mass Spectrometry 双蛋白酶柱、亚零度（-30°C）色谱系统和多通道精密温度控制器的构建

IF 1.5 4区工程技术

Journal of Research of the National Institute of Standards and Technology Pub Date : 2020-08-12 DOI: 10.6028/jres.125.025

J. W. Hudgens

引用次数: 4

Path-Integral Calculation of the Second Dielectric and Refractivity Virial Coefficients of Helium, Neon, and Argon. 氦、氖和氩的二次介电和折射率维里系数的路径积分计算

IF 1.3 4区工程技术

Journal of Research of the National Institute of Standards and Technology Pub Date : 2020-08-06 eCollection Date: 2020-01-01 DOI: 10.6028/jres.125.022

Giovanni Garberoglio, Allan H Harvey

{"title":"Path-Integral Calculation of the Second Dielectric and Refractivity Virial Coefficients of Helium, Neon, and Argon.","authors":"Giovanni Garberoglio, Allan H Harvey","doi":"10.6028/jres.125.022","DOIUrl":"10.6028/jres.125.022","url":null,"abstract":"We present a method to calculate dielectric and refractivity virial coefficients using the path-integral Monte Carlo formulation of quantum statistical mechanics and validate it by comparing our results with equivalent calculations in the literature and with more traditional quantum calculations based on wavefunctions. We use state-of-the-art pair potentials and polarizabilities to calculate the second dielectric and refractivity virial coefficients of helium (both 3He and 4He), neon (both 20Ne and 22Ne), and argon. Our calculations extend to temperatures as low as 1 K for helium, 4 K for neon, and 50 K for argon. We estimate the contributions to the uncertainty of the calculated dielectric virial coefficients for helium and argon, finding that the uncertainty of the pair polarizability is by far the greatest contribution. Agreement with the limited experimental data available is generally good, but our results have smaller uncertainties, especially for helium. Our approach can be generalized in a straightforward manner to higher-order coefficients.","PeriodicalId":54766,"journal":{"name":"Journal of Research of the National Institute of Standards and Technology","volume":null,"pages":null},"PeriodicalIF":1.3,"publicationDate":"2020-08-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11239192/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41326228","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

The Certification of Standard Reference Material 1979: Powder Diffraction Line Profile Standard for Crystallite Size Analysis. 标准参考物质1979的认证：用于晶粒尺寸分析的粉末衍射线轮廓标准

IF 1.3 4区工程技术

Journal of Research of the National Institute of Standards and Technology Pub Date : 2020-07-31 eCollection Date: 2020-01-01 DOI: 10.6028/jres.125.020

James P Cline, Marcus H Mendenhall, Joseph J Ritter, David Black, Albert Henins, John E Bonevich, Pamela S Whitfield, James J Filliben

{"title":"The Certification of Standard Reference Material 1979: Powder Diffraction Line Profile Standard for Crystallite Size Analysis.","authors":"James P Cline, Marcus H Mendenhall, Joseph J Ritter, David Black, Albert Henins, John E Bonevich, Pamela S Whitfield, James J Filliben","doi":"10.6028/jres.125.020","DOIUrl":"10.6028/jres.125.020","url":null,"abstract":"This rather long-standing project has resulted in a National Institute of Standards and Technology (NIST) Standard Reference Material (SRM) for the analysis of crystallite size from a consideration of powder diffraction line profile broadening. It consists of two zinc oxide powders, one with a crystallite size distribution centered at approximately 15 nm, and a second centered at about 60 nm. These materials display the effects of stacking faults that broaden specific hkl reflections and a slight amount of microstrain broadening. Certification data were collected on the high-resolution powder diffractometer located at beamline 11-BM of the Advanced Photon Source, and on a NIST-built laboratory diffractometer equipped with a Johansson incident beam monochromator and position sensitive detector. Fourier transforms were extracted from the raw data using a modified, two-step profile fitting procedure that addressed the issue of accurate background determination. The mean column lengths, 〈L〉area and 〈L〉vol, were then computed from the Fourier transforms of the specimen contribution for each reflection. Data were also analyzed with fundamental parameters approach refinements using broadening models to yield 〈L〉area and 〈L〉vol values. These values were consistent with the model-independent Fourier transform results; however, small discrepancies were noted for the 〈L〉area values from both machines and both crystallite size ranges. The fundamental parameters approach fits to the laboratory data yielded the certified lattice parameters.","PeriodicalId":54766,"journal":{"name":"Journal of Research of the National Institute of Standards and Technology","volume":null,"pages":null},"PeriodicalIF":1.3,"publicationDate":"2020-07-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11239193/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42386852","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

SysML Models for Discrete Event Logistics Systems. 离散事件物流系统的SysML模型。

IF 1.5 4区工程技术

Journal of Research of the National Institute of Standards and Technology Pub Date : 2020-07-29 eCollection Date: 2020-01-01 DOI: 10.6028/jres.125.023

Timothy Sprock, Conrad Bock

引用次数: 3

Thrombin: An Approach to Developing a Higher-Order Reference Material and Reference Measurement Procedure for Substance Identity, Amount, and Biological Activities. 凝血酶：一种开发用于物质识别、数量和生物活性的高阶参考物质和参考测量程序的方法

IF 1.3 4区工程技术

Journal of Research of the National Institute of Standards and Technology Pub Date : 2020-07-29 eCollection Date: 2020-01-01 DOI: 10.6028/jres.125.021

Craig M Jackson, Peter Esnouf, David L Duewer

引用次数: 0

PPDiffuse: A Quantitative Prediction Tool for Diffusion of Charged Polymers in a Nanopore. PPDiffuse:一种用于纳米孔中带电聚合物扩散的定量预测工具

IF 1.3 4区工程技术

Journal of Research of the National Institute of Standards and Technology Pub Date : 2020-06-19 eCollection Date: 2020-01-01 DOI: 10.6028/jres.125.018

David P Hoogerheide

引用次数: 0

Improvised Long Test Lengths via Stitching Scale Bar Method: Performance Evaluation of Terrestrial Laser Scanners per ASTM E3125-17. 通过缝合比例尺法改进的长测试长度：

IF 1.3 4区工程技术

Journal of Research of the National Institute of Standards and Technology Pub Date : 2020-05-28 eCollection Date: 2020-01-01 DOI: 10.6028/jres.125.017

Shendong Shi, Bala Muralikrishnan, Vincent Lee, Daniel Sawyer, Octavio Icasio-Hernández

{"title":"Improvised Long Test Lengths via Stitching Scale Bar Method: Performance Evaluation of Terrestrial Laser Scanners per ASTM E3125-17.","authors":"Shendong Shi, Bala Muralikrishnan, Vincent Lee, Daniel Sawyer, Octavio Icasio-Hernández","doi":"10.6028/jres.125.017","DOIUrl":"10.6028/jres.125.017","url":null,"abstract":"Periodic performance evaluation is a critical issue for ensuring the reliability of data from terrestrial laser scanners (TLSs). With the recent introduction of the ASTM E3125-17 standard, there now exist standardized test procedures for this purpose. Point-to-point length measurement is one test method described in that documentary standard. This test is typically performed using a long scale bar (typically 2 m or longer) with spherical targets mounted on both ends. Long scale bars can become unwieldy and vary in length due to gravity loading, fixture forces, and environmental changes. In this paper, we propose a stitching scale bar (SSB) method in which a short scale bar (approximately 1 m or smaller) can provide a spatial length reference several times its length. The clear advantages of a short scale bar are that it can be calibrated in a laboratory and has potential long-term stability. An essential requirement when stitching a short scale bar is that the systematic errors in TLSs do not change significantly over short distances. We describe this requirement in this paper from both theoretical and experimental perspectives. Based on this SSB method, we evaluate the performance of a TLS according to the ASTM E3125-17 standard by stitching a 1.15 m scale bar to form a 2.3 m reference length. For comparison, a single 2.3 m scale bar is also employed for direct measurements without stitching. Experimental results show a maximum deviation of 0.072 mm in length errors between the two approaches, which is an order of magnitude smaller than typical accuracy specifications for TLSs.","PeriodicalId":54766,"journal":{"name":"Journal of Research of the National Institute of Standards and Technology","volume":null,"pages":null},"PeriodicalIF":1.3,"publicationDate":"2020-05-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10871170/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48945430","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Improvised Long Test Lengths via Stitching Scale Bar Method: Interim Testing of Laser Trackers. 通过缝合刻度条方法改进长测试长度：激光跟踪仪的中期测试。

IF 1.3 4区工程技术

Journal of Research of the National Institute of Standards and Technology Pub Date : 2020-05-28 eCollection Date: 2020-01-01 DOI: 10.6028/jres.125.016

Vincent D Lee, Daniel Sawyer, Bala Muralikrishnan

{"title":"Improvised Long Test Lengths via Stitching Scale Bar Method: Interim Testing of Laser Trackers.","authors":"Vincent D Lee, Daniel Sawyer, Bala Muralikrishnan","doi":"10.6028/jres.125.016","DOIUrl":"10.6028/jres.125.016","url":null,"abstract":"Performance verifications of laser tracker systems (LTSs) often rely on calibrated length artifacts that are 2.3 m in length or more, as specified in International Standards Organization (ISO) and American Society of Mechanical Engineers (ASME) standards. The 2.3 m length is chosen as the minimum length that will sufficiently expose inaccuracy in LTSs. Embodiment of these artifacts often comes in the form of scale bars, fixed monuments, or a laser rail. In National Institute of Standards and Technology (NIST) Internal Report (IR) 8016, which was published in 2014 and discusses interim testing of LTSs, it was shown that a scale bar with three nests spaced 1.15 m apart was sufficient for exposing errors in LTSs. In that case, the LTS was placed symmetrically with respect to the scale bar so that both a 2.3 m symmetrical length and a 1.15 m asymmetrical length were presented to the LTS. This paper will evaluate whether a scale bar that is only 1.15 m in length can sufficiently expose errors within the LTS when it is stitched together to create a 2.3 m long test length.","PeriodicalId":54766,"journal":{"name":"Journal of Research of the National Institute of Standards and Technology","volume":null,"pages":null},"PeriodicalIF":1.3,"publicationDate":"2020-05-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11374359/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142301243","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0