Metalliska material - Dynamisk kraftkalibrering vid enaxlig utmattningsprovning - Del 1: Provningssystem (ISO 4965-1:2012, IDT)
Status:
Gällande
Köp denna standard
StandardSvensk standard
·
SS-ISO 4965-1:2012
Metalliska material - Dynamisk kraftkalibrering vid enaxlig utmattningsprovning - Del 1: Provningssystem (ISO 4965-1:2012, IDT)
Prenumerera på standarder med tjänst SIS Abonnemang. Genom att prenumerera får du effektiv åtkomst till gällande standarder och säkerställer att ditt företag alltid har tillgång till senaste utgåvan.
Läs mer om SIS Abonnemang
This part of ISO 4965 describes two methods (see Introduction) for determining the relationship between the dynamic force range (?Ft) applied to a test-piece in a uniaxial, sinusoidal, constant amplitude test and the force range indicated (?Fi) 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.
Metalliska material - Dynamisk kraftkalibrering vid enaxlig utmattningsprovning - Del 1: Provningssystem (ISO 4965-1:2012, IDT)
Prenumerera på standarder med tjänst SIS Abonnemang. Genom att prenumerera får du effektiv åtkomst till gällande standarder och säkerställer att ditt företag alltid har tillgång till senaste utgåvan.
Läs mer om SIS Abonnemang