Proceedings

EVALUATION OF FORCE STANDARD MACHINES BY USING BUILD-UP SYSTEM

CALIBRATION OF STRAIN CYLINDERS FOR COMPRESSION TESTING MACHINE AT LNE

DEVELOPMENT AND CALIBRATION OF THE INRiM COMPOSITE 6-COMPONENTS DYNAMOMETERS AND THE RESULTS OF 20 YEARS OF INTERCOMPARISONS

ROUND TABLE ON MUTLICOMPONENT MEASUREMENT TO IMPROVE THE TRACEABILITY IN THE FORCE CHAIN

INVESTIGATION OF AUTOMATIC MEASUREMENT SYSTEM ON WEIGHING INSTRUMENTS

According to the test requirements of recommendation OIML R76 about non-automatic weighing instruments, an automatic measurement system on weighing instruments is studied and developed. The operators of the system can perform type evaluation tests of weighing instruments which maximum capacity are less than 3000 kg by means of mass standards combined automatically at random. The system includes automatic loading and unloading function without impact and adhesion. Therefore type evaluation tests of weighing instruments with the maximum capacity above 50 kg such as indication error test,...

RESULTS OF THE BRINELL HARDNESS PROFICIENCY TEST AND THE IMPORTANCE OF STANDARD INDENTATION

Measurement of indentation diameter is a very important factor in Brinell hardness as it can determine the reliability of the result. It is because of the ambiguous boundary line due to the pile up around the indentation. To evaluate the capability of indentation measurement, we prepared Brinell indentation hardness blocks and performed the proficiency test. Participating test laboratories have reported that deviation increases at the nominal diameter of 3 mm or larger. The result of this study indicates that this was because of the generation of up to 0.02 mm deviation or higher uncertainty...

INVESTIGATION OF TEST FORCE OF REFERENCE HARDNESS STANDARD OF CROATIA

Reference hardness standard with HV1 – HV50 measuring range was installed at LIMS (Laboratory for Testing Mechanical Properties) at the end of 2007 with the aim of providing continuous improvement of the metrology infrastructure of Croatia. The load is realised by means of weights and a lever. Measurements of test forces, both axial and radial, were carried out. In this paper the results of the measurements are presented and discussed.

EVALUATION OF UNCERTAINTY OF CONTACT POINT AND CONTACT DEPTH BY USING NON-LINEAR FITTING

The one of difficulties is how to evaluate the origin of depth from force-indenter displacement curve in instrumented indentation test (IIT). One of determination technique it is that using the fitting using some model function. How to evaluate the uncertainty of the fitted coefficients is another problem in this case. We have been developing the uncertainty evaluation software and the uncertainty of fitting of power-law is evaluated by using the final Jacobian matrix of iteration process. In this paper, we explained the uncertainty calculation for the non-linear function. We applied it to...

RESEARCH OF NEW INDUSTRIAL HARDNESS TESTING USING “EQUIVALENT INDENTATION DEPTH &Delta;<i>h</i>_e”

CURRENT STATUS OF REBOUND HARDNESS TEST BLOCKS IN JAPAN AND OUTLOOK

Currently, about 30,000 high-precision, standardized hardness blocks are supplied to the Japanese market each year, and are available in about 140 different types. The history of hardness blocks in Japan can be traced back more than 70 years to the development of the Shore hardness block (φ64×t 15 mm) by Shoichi Yamamoto. In Japan, the Shore block has the largest share of the market for rebound hardness test blocks. Recently, however, the Leeb hardness block has also been increasingly used for rebound hardness testing, and the R type (φ115×t 33 mm) and P type (φ90×t 56 mm) Leeb hardness...