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JJF 1728-2018 English PDF

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JJF 1728-2018: Calibration Specification for Ultrasonic Testing Instruments for Resin Matrix Composites
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JJF 1728-2018English789 Add to Cart 6 days [Need to translate] Calibration Specification for Ultrasonic Testing Instruments for Resin Matrix Composites Valid JJF 1728-2018

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Standard similar to JJF 1728-2018

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Basic data

Standard ID JJF 1728-2018 (JJF1728-2018)
Description (Translated English) Calibration Specification for Ultrasonic Testing Instruments for Resin Matrix Composites
Sector / Industry Metrology & Measurement Industry Standard
Classification of Chinese Standard A59
Word Count Estimation 34,372
Date of Issue 2018-12-25
Date of Implementation 2019-03-25
Regulation (derived from) State Administration of Markets, Announcement No. 34 of 2018
Issuing agency(ies) State Administration for Market Regulation

JJF 1728-2018: Calibration Specification for Ultrasonic Testing Instruments for Resin Matrix Composites


---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
(Resin-based composite ultrasonic detector calibration specification) National Metrology Technical Specification Resin-based composite ultrasonic detector calibration specification Published on.2018-12-25 2019-03-25 implementation State Market Supervisory Administration released Resin-based composite Ultrasonic detector calibration specification Focal Point. National Acoustic Metrology Technical Committee Drafting unit. AVIC Composites Co., Ltd. China Aviation Industry Corporation Basic Technology Research Institute China Institute of Metrology This specification entrusts the National Acoustic Metrology Technical Committee to explain Drafters of this specification. Liu Songping (China Aviation Composite Materials Co., Ltd.) Liu Feifei (China Aviation Industry Corporation Basic Technology Research Institute) Bian Wenping (China Institute of Metrology) Xing Guangzhen (China Institute of Metrology) Fu Tianhang (China Aviation Composite Materials Co., Ltd.) Li Legang (China Aviation Industry Corporation Basic Technology Research Institute) Shi Junwei (China Aviation Industry Corporation Basic Technology Research Institute)

table of Contents

Introduction (III) 1 Scope (1) 2 References (1) 3 Terms and units of measurement (1) 3.1 Longitudinal resolution (1) 3.2 Near surface resolution (1) 3.3 Near-surface resolution (2) 3.4 Number of pulse echo cycles (2) 3.5 Scanning sensitivity (2) 4 Overview (2) 5 Measurement characteristics (4) 5.1 Horizontal linearity error (4) 5.2 Vertical linearity error (5) 5.3 Longitudinal resolution (5) 5.4 Near surface resolution (5) 5.5 Near-surface resolution (5) 5.6 Number of pulse echo cycles (5) 5.7 Detection sensitivity (5) 5.8 Baseline electrical noise (5) 5.9 Scanning range (5) 5.10 Scanning sensitivity (5) 5.11 Glue defect detection sensitivity (5) 6 Calibration conditions (5) 6.1 Environmental conditions (5) 6.2 Measurement standards and other equipment (5) 7 Calibration items and calibration methods (6) 7.1 Calibration Project (6) 7.2 Calibration method (6) 8 Calibration result expression (16) 8.1 Calibration Data Processing (16) 8.2 Measurement uncertainty of calibration results (16) 8.3 Calibration Certificate (16) 9 re-study interval (16) Appendix A Calibration Test Blocks (17) Appendix B Inner Page Format of Calibration Certificate (22) Appendix C Example of Measurement Uncertainty Evaluation (25)

Introduction

This specification is based on the requirements of JJF 1071-2010 "Rules for the preparation of national metrological calibration specifications". In the formulation of this specification, the technical reference mainly refers to JJG746-2004 Ultrasonic Flaw Detector and ASTM. E317-16 "Standard Practice for Evaluating PerformanceCharacteristics of Ultrasonic Pulse-Echo Testing Instruments and Systems without the Use of Electronic MeasurementInstruments (Ultrasonic Pulse Echo Detector and Systematic without Other Electronic Measuring Instruments) Performance parameter standard practice) Ultrasonic detector vertical linear, horizontal linear and other performance parameters and test method. This specification gives a composite ultrasonic inspection based on JJF 1059.1-2012 "Measurement Uncertainty Evaluation and Representation" An example of the evaluation of the measurement uncertainty of the test sensitivity of the tester. This specification is the first release. Resin-based composite ultrasonic detector calibration specification

1 Scope

This specification applies to the use of comparative test block pairs without the need for other specialized electronic measuring instruments. Resin-based composite ultrasonic detectors may affect the calibration of the performance of defects detection, positioning and analysis.

2 reference files

This specification refers to the following documents. JJG746 Ultrasonic Flaw Detector Verification Procedure JJF 1001 General Measurement Terms and Definitions JJF 1059.1 Measurement Uncertainty Evaluation and Representation GB/T 3102.7 Amount and unit of acoustics GB/T 12604.1 Non-destructive testing terminology ultrasonic testing For dated references, only dated versions apply to this specification; undated quotations The latest version (including all amendments) applies to this specification.

3 terms and units of measure

This specification uses the quantities and units specified in GB/T 3102.7. The following terms and definitions defined in JJF 1001, JJF 1059.1 and GB/T 12604.1 apply to this specification. 3.1 longitudinal resolution depth resolution, rangeresolution The resin-based composite ultrasonic detector is matched with the transducer, which distinguishes the direction of ultrasonic propagation (usually in use and The thickness of the composite material is consistent. The ability to adjoin two different depth defects, according to formula (1) or formula (2) Calculation. ΔhL=hD2-hD1 (1) ΔhL=Δnp×hp (2) In the formula. ΔhL---longitudinal resolution, mm; hD1, hD2--- respectively the depth of two defects adjacent in the thickness direction of the resin-based composite material, mm; Δnp---The difference in the number of layups of two defects adjacent in the thickness direction in the resin-based composite material, Δnp=1, 2, 3,,n; Hp---1 resin-based composite layup nominal thickness, mm. 3.2 Near-surface resolution near-surfaceresolution, entry-surfaceresolution The resin-based composite ultrasonic detector is matched with the transducer, and the ultrasonic wave is distinguished from the resin matrix composite incident table. The ability of a surface defect near the surface is calculated according to formula (3) or formula (4). ΔhE=hD (3) ΔhE=nE×hp (4)

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