Abstract

This paper describes the study about alignment test on testing machine. It is based on the standards of ASTM E1012-14 (Standard Practice for Verification of Testing Frame and Specimen Alignment Under Tensile and Compressive Axial Force Application) and Chinese calibration guideline. The strain-gauge specimens of ASTM and reference extensometer of Chinese guideline were both tested on one testing machine. The test results were analyzed and compared. The traceability about both methods were also discussed. Meanwhile the amplifier was calibrated before test. It is the first time in China to performance this comparison test.

Highlights

  • The alignment on testing machine is very important to obtain the right test results of material

  • Two laboratories in China, both own both equipment of ASTM E1012 and Chinese alignment guideline, decide to do the comparison test in 2019

  • ISO 23788:2012 (Metallic materials – Verification of the alignment of fatigue testing machines) [4] describes about alignment test, but it is very similar as ASTM E1012

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Summary

INTRODUCTION

The alignment on testing machine is very important to obtain the right test results of material. The methods are different, and the philosophy of traceability are not same To prove both methods reliable on testing the alignment at one testing machine, it is necessary to do a comparison test to see if there will be big tolerance by these two standards. ISO 23788:2012 (Metallic materials – Verification of the alignment of fatigue testing machines) [4] describes about alignment test, but it is very similar as ASTM E1012. The details and difference between ASTM E1012 and Chinese guideline are: the specimen, the procedure, the calculation, the classification (deviation) and the traceability.

THE EQUIPMENTS
According to ASTM E1012-14
According to Chinese guideline
DATA ANALYSISI
DISCUSSION
Findings
SUMMARY
Full Text
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