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Conditions for approval required by: Julien Gauther
Certification of Aerospace Products to international quality Standards
Certification of Aerospace Products to international quality Standards
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EN2549-120043F:
This bolt is long enough to be directly tensile tested. In CoC, why tensile tests have been carried out on specimens? (Tensile machine capacity? Other reasons?)
EN3740-060:
Additional fatigue tests: 3 tests show values below 130000 cycles and related bolts are not broken (without failure written in additional fatigue test report). Why these 3 tests have been stopped before reaching 130000 cycles?
EN3740-080026F:
Dimensional report for this reference apparently shows values for MJ6 and not MJ8. Could you please fix this?
Additional fatigue tests: 2 tests show values below 130000 cycles and related bolts are not broken (without failure written in additional fatigue test report). Why these 2 tests have been stopped before reaching 130000 cycles?
EN3820-080030:
This bolt is long enough to be directly tensile tested. In CoC, why tensile tests have been carried out on specimens? (Tensile machine capacity? Other reasons?)
Many thanks in advance,
Best regards
Julien
EN2549-120043F :
Sur l’ISO 9152 la traction ne s’applique pas si la longueur filetée < une fois et demie le diamètre nominal de filetage. Dans ce cas la longueur filetée (L3=11.5 mm) < 1.5 x le diamètre de filetage = 12 mm.
EN3740-080026F :
EN3740 est une norme d’un axe et en regardant le plan on voit que à partir de diamètre 8, on a le fut plus grand que le filetage, la raison de montrer les valeurs de MJ6.
Pour les tests de la fatigue, la machine s’arrête automatiquement une fois une chute de fréquence est détectée, à cause d’une propagation de fissure afin d’éviter la perte des outillages.
EN3820-080030 :
Sur l’ISO 9152 la traction ne s’applique pas si la longueur filetée (11.5 mm) < une fois et demie le diamètre nominal de filetage (12 mm).
Many thanks for all these answers.
All is clear for me now.
Approved from my side.
Best regards
Julien