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  • BSI
    BS ISO 4965-1:2012 Metallic materials. Dynamic force calibration for uniaxial fatigue testing - Testing systems
    Edition: 2013
    $435.35
    / user per year

Description of BS ISO 4965-1:2012 2013

This part of ISO 4965 describes two methods (see Introduction) for determining the relationship between the dynamic force range (ΔFt) applied to a test-piece in a uniaxial, sinusoidal, constant amplitude test and the force range indicated (ΔFi) by the testing system.

These methods are applicable to dynamic testing systems operating away from system resonant frequencies and are relevant to testing systems where the dynamic force measurement errors are either unknown or where they are expected to exceed 1 % of the applied force range.

The dynamic force measurement errors are determined by comparison of the peak forces indicated by the dynamic testing system with those measured by the strain gauged dynamic calibration device (DCD). This DCD has previously undergone static calibration (see 5.2.1) against the testing system indicator.

For Method A (Replica test-piece method), the dynamic calibration is applicable over the validated range of frequencies for that type of test-piece only. A frequency-dependent correction factor is applicable for the correction of dynamic force measurement errors of up to 10 % of dynamic force range. By using such a correction factor, the actual test-specimen dynamic force measurement error will be reduced to less than 1 % of the dynamic force range.

For Method B (Compliance envelope method), the dynamic calibration is applicable over the range of test frequencies validated for test-pieces whose compliance lies between those of the two DCDs. No correction factor is applicable, as Method B does not permit dynamic force measurement errors above 1 % of the dynamic force range.

NOTE Annex A provides guidance on when the system should be re-calibrated by the methods described in this part of ISO 4965.



Standard NumberBS ISO 4965-1:2012
TitleMetallic materials. Dynamic force calibration for uniaxial fatigue testing - Testing systems
StatusUnder Review
Publication Date2013-01-31
ReplacesBS 7935-1:2004
CorrectsBS ISO 4965-1:2012
DescriptorsTest equipment, Test specimens, Mathematical calculations, Calibration, Dynamic testing, Force measurement, Stress analysis, Axial stress, Verification, Approval testing, Amplitude
ICS77.040.10 Mechanical testing of metals
CommitteeISE/101/6
ISBN978 0 580 82070 0
PublisherBSI
Pages24

About BSI

BSI Group, also known as the British Standards Institution is the national standards body of the United Kingdom. BSI produces technical standards on a wide range of products and services and also supplies certification and standards-related services to businesses.
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