A52 长度计量 标准查询与下载

ASTM E111-04 杨氏弹性模量、正切模量和弦切模量的标准试验方法

The value of Youngrsquo;modulus is a material property useful in design for calculating compliance of structural materials that follow Hookersquo;law when subjected to uniaxial loading (that is, the strain is proportional to the applied force). For materials that follow nonlinear elastic stress-strain behavior, the value of tangent or chord modulus is useful in estimating the change in strain for a specified range in stress. Since for many materials, Youngrsquo;modulus in tension is different from Youngrsquo;modulus in compression, it shall be derived from test data obtained in the stress mode of interest. The accuracy and precision of apparatus, test specimens, and procedural steps should be such as to conform to the material being tested and to a reference standard, if available. Precise determination of Youngrsquo;modulus requires due regard for the numerous variables that may affect such determinations. These include (1) characteristics of the specimen such as orientation of grains relative to the direction of the stress, grain size, residual stress, previous strain history, dimensions, and eccentricity; (2) testing conditions, such as alignment of the specimen, speed of testing, temperature, temperature variations, condition of test equipment, ratio of error in applied force to the range in force values, and ratio of error in extension measurement to the range in extension values used in the determination; and (3) interpretation of data (see Section 9). When the modulus determination is made at strains in excess of 0.25 %, correction should be made for changes in cross-sectional area and gage length, by substituting the instantaneous cross section and instantaneous gage length for the original values. Compression results may be affected by barreling (see Test Methods E 9). Strain measurements should therefore be made in the specimen region where such effects are minimal. FIG. 2 Load-Deviation Graph1.1 This test method covers the determination of Young's modulus, tangent modulus, and chord modulus of structural materials. This test method is limited to materials in which and to temperatures and stresses at which creep is negligible compared to the strain produced immediately upon loading and to elastic behavior.1.2 Because of experimental problems associated with the establishment of the origin of the stress-strain curve described in 8.1, the determination of the initial tangent modulus (that is, the slope of the stress-strain curve at the origin) and the secant modulus are outside the scope of this test method.1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory requirements prior to use.

Standard Test Method for Young's Modulus, Tangent Modulus, and Chord Modulus

KS B ISO 4706:2003 可重复充气焊接钢气瓶

이 규격은 시험 압력이 75 bar를 초과하지 않으며 내용적이 1~150 L 이하인 상

Refillable welded steel gas cylinders

JJG 981-2003 阿贝折射仪标准块

Standard Blocks for Abbe Refractometers

JJF 1108-2003 石油钻具接头螺纹工作量规、圆螺纹套管工作量规和油管螺纹工作量规校准规范

Calibration Specification for Working Gauge of Rotary Shouldered Connections,Round Thread Casing and Tubing

JJG 703-2003 光电测距仪

Electro-optical Distance Meter (EDM Instruments)

JJG 100-2003 全站型电子速测仪

Electronic Tachometer Total Station

JJF 1105-2003 触针式表面粗糙度测量仪校准规范

本规范适用于触针式表面粗糙度测量仪的校准。

Calibration Specification for Contact (Stylus) Instruments of Surface Roughness Measurement by the Profile Method

JJG 24-2003 深度千分尺

Depth Micrometers

JJG 219-2003 铁路轨距尺

Track Gauging Rule for Standard Gauge Railway

ASME MFC-14M-2003 用小孔径精确孔板流量计法测量液体流量

This Standard specifies the geometric and method of use (installation and flowing conditions) for orifice meters of 6 mm to 40 mm (1/4 in. to 1 Alt+0189 in.) line size when they are inserted in a conduit running full. It also gives necessary information for calculating flow rate and its associated uncertainty. It applies only to differential pressure devices in which the flow remains subsonic throughout the measuring section, flow is steady or varies only slowly with time, and the fluid is considered single-phase. In addition, the uncertainties are given in the appropriate sections of this Standard for each of these devices within the pipe size and Reynolds number limits, which are specified. This Standard covers devices for which sufficient calibrations have been made to enable the specification of coherent systems of application and to enable calculations to be made within certain predictable limits of uncetainty. The devices introduced into the pipe are called primary devices. The term primary device also includes the pressure taps and the associated upstream and downstream piping. All other instruments or devices required for the measurement or transmission of the differential pressures are known as secondary elements, and in combination are referred to as the secondary devices. This Standard covers primary devices; the secondary devices will be mentioned only occasionally, as and when necessary for the proper operation of the primary device. The different primary devices covered in this Standard are (a) orifice plates used with corner pressure taps, (b) orifice plates used with flange pressure taps, (c) specially designed orifice meters with integral fittings.

Measurement of Fluid Flow Using Small Bore Precision Orifice Meters

JJG 425-2003 水准仪

Levels

JJG 332-2003 齿轮渐开线样板

Gear Involute Masters

JJG 177-2003 圆锥量规

Taper Gauges

ASTM E2262-03(2009) 评定瑟斯顿识别距离的标准实施规程

Under the assumptions of the model, the Thurstonian model approach to measuring the perceived difference between two samples (whether overall or for a specific attribute) is independent of the sensory method used to collect the data. Converting results obtained from different test methods to d'' values permits the assessment of relative differences among samples without requiring that the samples be compared to each other directly or that the same test methods be used for all pairs of samples. Thurstonian scaling has been applied to: Creating a historical database to track differences between production and reference samples over periods in which different test methods were used to measure the difference, Comparing the relative sensitivities of different user groups and consumer segments, Comparing trained panels that use different measuring techniques, Comparing the relative sensitivities of consumers versus trained panels, Comparing different methods of consumer testing (for example, CLT versus HUT, preference versus hedonic scales, etc.), and Comparing different discrimination test methods.1.1 This practice describes procedures to estimate Thurstonian discriminal distances (that is, d'' values) from data obtained on two samples. Procedures are presented for four forced-choice methods (that is, the triangle, the duo-trio, the 3-alternative-forced-choice (or 3-AFC) and the 2-AFC (also called the directional difference test)), the A/Not-A method, the Same-Different method and for data obtained from ordered category scales. Procedures for estimating the variance of d'' are also presented. Thus, confidence intervals and statistical tests can be calculated for d''. 1.2 The procedures in this document pertain only to the unidimensional, equal-variance model. Other, more complicated Thurstonian models, involving multiple dimensions and unequal variances exist but are not addressed in this standard. The procedure for forced-choice methods is limited to dichotomous responses. The procedure for the A/Not-A method assumes equal sample sizes for the two samples. The procedure for the Same-Different method assumes equal sample sizes for the matched and unmatched pairs of samples. For all methods, only unreplicated tests are considered. (Tests in which each assessor performs multiple (that is, replicated) evaluations require different analyses.) 1.3 Thurstonian scaling is a method for measuring the perceptual difference between two samples based on a probabilistic model for categorical choice decision making. The magnitude of the perceived difference, δ, can be estimated from the assessors'' categorical choices using the methods described in this practice (See Appendix X3 for a more detailed description of Thurstonian scaling). 1.4 In theory, the Thurstonian δ does not depend on the method used to measure the difference between two samples. As such, δ provides a common scale of measure for comparing samples measured under a variety of test conditions. For example, Thurstonian scaling can be used to compare products measured under different test conditions, to compare panels (trained, consumer or both) that have evaluated the same samples (using the same or different test methods) and to compare test methods on their ability to discriminate samples that exhibit a fixed sensory difference. 1.5 This standard may involve hazardous materials, operations and equipment. This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establ......

Standard Practice for Estimating Thurstonian Discriminal Distances

JJF 1110-2003 建筑工程质量检测器组校准规范

Calibration Specification for Construction Quality Tester Sets

JJF 1103-2003 万能试验机计算机数据采集系统评定

Evaluation for Computerized Data Acquisition Systems of Universal Testing Machines

ASME MFC-1M-2003 管道中液体流量测量用术语汇编

This Standard consists of a collection of definitions of those terms that pertain to the measurement of fluid flow in pipes. Only those terms of general usage have been included. Terms having unique meaning when applied to specific meters should be included in a glossary within the specific flowmeter standard.

Glossary of Terms Used in the Measurement of Fluid Flow in Pipes

JJF 1102-2003 内径表校准规范

本规范适用于分度值为0.01mm、0.001mm，测量范围为（2～450）mm的内径表的校准。

Calibration Specification for Bore Dial Indicators

ASME MFC-11M-2003 用科氏质量流量计法测量液体流量

This Standard gives guidelines for the selection, installation, calibration, and operation of Coriolis meters for the determination of mass flow, density, volume flow, and other related parameters of flowing fluids. It also gives appropriate considerations regarding the fluids to be measured. The content of this Standard is primarily applied to the metering of liquids. This Standard also gives guidance, within specified limits, to the metering of other fluids, mixtures of solids or gas in liquids. Although Coriolis meters may be used for gas measurement, specific guidance for gas measurement is not within the scope of this Standard.

Measurement of fluid flow by means of Coriolis mass flowmeters

JJF 1100-2003 平面等厚干涉仪校准规范

Calibration Specification for Flat Equal Thickness Interferometers