We use cookies to improve your browsing experience. By continuing to use our site, you accept our cookie policy.

close Close Cookie Notification
Instron
  • Back
  • Home
  • Produkty
    Urządzenia testujące
    Maszyny Wytrzymałościowe - Zrywarki
    Wytrzymałość strukturalna
    Automatyczne systemy testujące
    Dynamiczne i zmęczeniowe systemy testujące
    Symulatory zderzeń
    Testery skręcania
    Reometry i Plastometry (MFT)
    Młoty zrzutowe i młoty wahadłowe
    HDT i Vicat
    Produkty poprzednich generacji
    AKCESORIA
    Oprogramowanie
    Głowice pomiarowe
    Oddzieranie, tarcie, przebicie
    Komory temperaturowe i Piece
    Uchwyty do rozciągania
    Uchwyty do badania ugięcia
    Płyty kompresyjne
    Systemy i akcesoria biomedyczne
    Ekstensometry
    Composite Fixtures
    Uchwyty do badania elektroniki
    Pomiary i przygotowanie próbek
    All Accessories
    Katalog akcesoriów
  • Rozwiązania branżowe
    Search by Material Search by Standard Search by Test Type
    Industries
    Automotive
    Biomedical
    Electronics
    Materials
    Composites
    Metals
    Plastics
  • Serwis i wsparcie
    Instron Remote Technical Support CYKL ŻYCIA PRODUKTU Historie serwisowe Szkolenia
    USŁUGI
    Kalibracja i weryfikacja
    Usługi wdrożeniowe Instron
    Instalacja i przeniesienie
    WSPARCIE TECHNICZNE
    FAQ Często zadawane pytania
    Usługi aktualizacji oprogramowania
    ZASOBY
    Instrukcje
    Lokalizator numerów seryjnych
  • Nasza firma
    KARIERA Informacje prasowe NEWSLETTERY
    O NAS
    Nasza historia
    Lokalizacje
    Akredytacje i certyfikaty
    ZASOBY
    Słownik
    Typy testów
    Biuletyny
    Literatura
    Aktualności
    Poradnik
    Webinaria
    Studia przypadku
  • Skontaktuj się z nami
  • Polska
Testing Solutions » By Test Type » Low Cycle Fatigue » NADCAP Alignment Standards

Tensile Testing To NADCAP Alignment Standards

Standard

  • NADCAP
  • ASTM E1012

Materials

  • Metale
  • Kompozyty

Test Types

  • Rozciąganie
  • Zmęczenie niskocykliczne/TMF
  • Zmęczenie wysokocykliczne
Contact usView Accessories Catalog
8000084Pjpg
Servohydraulic systems with Alignpro
alignment cell under load in hydraulic grips
  • 8000084Pjpg
  • Servohydraulic systems with Alignpro
  • alignment cell under load in hydraulic grips
  • Description
  • Literature

NADCAP is an acronym for the National Aerospace Defense Contractors Accreditation Program. It is "the leading worldwide cooperative program of major companies designed to manage a cost-effective consensus approach to special processes and products and provide continual improvement within the aerospace and automotive industries". NADCAP, as applied to mechanical testing, is not a standard but an audit checklist which must be passed in order for an aerospace supplier to be NADCAP compliant. There are two main audit checklists that apply to mechanical testing: AC7101 for metallic materials, and AC7122 for non-metallic materials. Each of these checklists are dozens of pages long, but the main item of concern for mechanical testing laboratories is alignment and allowable bending.

For metals, the maximum allowable bending for static tests is 10% (non-brittle materials, <5% elongation to failure) and 8% (brittle materials, >5% ETF). The maximum allowable bending for all dynamic tests is 5%. For composites, the maximum allowable bending is 8%.

Percent bending strain is calculated in accordance with ASTM E1012, and is defined as "the greatest difference in axial strain under load between the average strain (of 3 or 4 strain gauges in any circumferential set) and any individual gage in that set, divided by the average strain, times 100. Furthermore, in order to ensure that the bending is measured in a way that is meaningful to the actual tests, the strain gaged specimens must represent those that will be tested, and use the actual load train that will be used for tensile testing. It is not appropriate to remove the grips that will be used for actual testing. For all these reasons, achieving the desired bending requirements can be challenging. Only the most rigid and quality-made mechanical testing systems and grips can meet the bending requirements of NADCAP.

Performing a proper alignment verification to NADCAP involves the following measurement procedures:

  • Producing an alignment "cell" (strain-gauged specimen) that represents the specimen to be tested
  • Inserting the cell in the actual grips to be used for tensile testing
  • Applying a load (defined by NADCAP) and measuring the bending
  • Remove the cell and reinsert it in a reverse position (rotated 180 degrees around the longitudinal axis)
  • Apply the proof load and measure the bending
  • Remove the cell and reinsert it in the inverted position (rotated 180 degrees around the horizontal axis)
  • Apply the proof load and measure the bending
  • Finally, remove the cell and reinsert it, inverted, this time reversed as well.
  • In the end, none of the bending strains may exceed the allowable strain limits.

 

If any of the bending strains exceed the limits, it is necessary to adjust the load string and redo the process. This can be done "manually" by loosening/tapping/retightening the load string, shimming, or other mechanical "empirical" means. Alternatively, Instron offers an AlignPro kit which fits between the load cell and the crosshead of the machine, which allows one to adjust the angular and axial alignment of the system while under load. The strain gauge outputs are monitored live to provide real time precise adjustment of the grip string to achieve minimum bending. Fitting AlignPro kits to Electromechanical or Servohydraulic systems is highly recommended for any laboratory wishing to meet the demanding requirements of NADCAP.

 

The challenges of testing to this standard are:

  • System and load string stiffness and alignment
  • Verifying alignment of a system

 

Instron's Solution:

  • Instron has a number of testing frames, grips, and fixtures that are designed with NADCAP in mind, and combined with the AlignPro fixture, maintaining alignment on a system is as easy as ever.
  • Instron Service will perform an ASTM E1012 verification to ensure the system meets NADCAP requirements

 

It is important to review NADCAP and ASTM standards in order to fully understand the test setup, procedure, and results requirements.

.

AlignPRO™ Alignment System

Compliant with ASTM E 1012 standards, the New AlignPRO™ system is designed to assist you in the measurement, adjustment and verification of load string alignment.

  • Products
  • 8/9/2013
  • 0.8 MB

Alignment Calibration

With increasing recognition that testing systems must be properly aligned for the best test results, Instron's alignment calibration service is now offered for most types of testing machines. A comprehensive characterization of the load frame alignment is provided per ASTM E 1012 using a strain gaged specimen. The brochure lists standards that require alignment and a sample calibration report.

  • Services
  • 3/24/2006
  • 0.9 MB

Region Selector

Dismiss Region Selector

Americas

  • North America
  • Brasil
  • South America

All Other Countries

  • Global Site

Europe

  • France
  • Deutschland
  • Italia
  • Polska
  • España
  • Türkçe
  • United Kingdom

Asia Pacific

  • 中国
  • India
  • 日本
  • 대한민국
  • 台灣
  • ประเทศไทย
Instron Logo White
Dane kontaktowe

Dział handlowy: +48 603 779 585

Serwis: +48 691 016 100

PRZYDATNE LINKI
  • Systemy testujące
  • Oprogramowanie
  • Akcesoria
  • Katalog
  • Słownik
  • Biblioteka
  • Rozwiązania do badań i testów
  • Newsletter
  • Webinaria
  • Studia przypadku
  • Wydarzenia
  • Kariera
Policies / Legal
  • Polityka prywatności i plików cookie
  • Warunki korzystania
  • Dostępność
  • Kontrola eksportu
  • Informacja o danych RODO
Skontaktuj się z nami
ZAPISZ SIĘ DO NASZEGO NEWSLETTERA
ADRES E-MAIL
© Illinois Tool Works Inc. All rights reserved.
[email protected]
  • Polityka prywatności i plików cookie
  • Warunki korzystania
  • Dostępność
  • Kontrola eksportu
  • Informacja o danych RODO