Il nostro sito utilizza cookies per assicurare ai nostri utenti la miglior esperienza d’uso. Continuando a sfogliare il nostro sito, accettate l’utilizzo dei cookies. Ulteriori informazioni

chiuso Close Cookie Notification
Instron
  • Back
  • Home
  • Prodotti
    SISTEMI DI PROVA
    Sistemi di prova universali
    Durabilità strutturale
    Sistemi di prova automatizzati
    Sistemi di prova di fatica e dinamica
    Simulazione di collisione
    Sistemi per test di torsione
    Reometri e Melt Flow Tester
    Torri a caduta di grave e Pendoli
    HDT & Vicat
    sistemi fuori produzione
    ACCESSORI
    Software
    Celle di carico
    Peel, attrito, perforazione
    Camere climatiche e forni
    Morsetti di trazione
    Dispositivi di prova a flessione
    Piatti di compressione
    Dispositivi per il settore biomedico farmaceutico
    Estensometri
    Dispositivi compositi
    Dispositivi per microelettronica
    Misurazione e preparazione dei provini
    Tutti gli accessori
    Catalogo degli accessori
  • Soluzioni industriali
    PER MATERIALE PER STANDARD PER TIPO DI PROVA
    PER INDUSTRIA
    Automobilistico
    Biomedicale
    Elettronico
    MATERIALI
    Compositi
    Metalli
    Plastica
  • Assistenza e supporto
    Instron Remote Technical Support CICLO DI VITA DEL PRODOTTO
    ASSISTENZA
    Taratura e verifica
    Assistenza Instron all'implementazione
    Manutenzione preventiva
    Installazione e trasferimento
    Riparazione e Ammodernamento
    Aggiornamenti
    FORMAZIONE
    Segreti per prove affidabili
    SUPPORTO TECNICO
    DOMANDE FREQUENTI
    Servizi di aggiornamento software
    RISORSE
    Manuali
    Localizzatore del numero di serie
  • La nostra azienda
    CARRIERE SALA STAMPA ISCRIVITI ALLE NOSTRE NEWSLETTER
    CHI SIAMO
    La nostra storia
    Sedi
    Accreditamenti e certificazioni
    RISORSE
    Glossario
    Tipi di prove
    Newsletter
    Raccolta letteratura di settore
    Notizie
    Eventi
    Webinar
    Casi di studio
    Termini e Condizioni
    Accessibilità
    Avviso sui cookie
    Informativa sulla privacy dei dati GDPR
    Informativa sulla Privacy
    Termini & Condizioni
    Termini di utilizzo
  • Contattaci
  • Italia
Soluzione per prove » By Test Type » Fatica a basso numero di cicli/TMF » ISO 13001 & ASTM D3479

ISO 13001 and ASTM D3479 Improving Throughput in Composites Fatigue Tests

Specimen

  • Compositi

Standard

  • ASTM D3479
  • ISO 13001

Company

  • National Composites Certification and Evaluation Facility (NCCEF)

Materials

  • Compositi

Business Sector

  • Aerospace and Suppliers
  • Automotive

Test Types

  • Kurzzeit-Schwingfestigkeitsprüfung
Contact usView Accessories Catalog
Specimen Self Heating Control
  • Specimen Self Heating Control
  • Descrizione
  • Literature

In recent years, composites fatigue testing has rapidly moved from a research interest to a critical commercial requirement, but the cost - in terms of machine time - remains a significant challenge to commercial testing The wind energy industry has led this demand, but aerospace and automotive sectors are defining their own needs in this area and fatigue performance is expected to become an additional qualification requirement for their composite materials and assemblies.

Cyclic loading of composites dissipates a considerable amount of energy, which results in “self-heating” of specimens. Not only can this cause specimen temperature to rise by more than 20 °C in the wrong test conditions, but this varies during the course of a test, and is rarely repeatable from one specimen to the next. Standard practice demands a single low frequency (typically 3 to 5 Hz) for all tests in order to avoid overheating, but that means very long and expensive test schedules. Temperature has a major effect on results since the performance of these materials is far more temperature sensitive than that of metals. Unfortunately, the fact that specimens generate heat internally means that there is always an offset from the surrounding environment, so temperature rise is not actually controlled even when working in a chamber. In response to this demand, Instron® developed a unique control solution that typically gives more than a 25% time saving for a composite S-N dataset and can maintain specimen temperature to within ± 0.5 °C of a specified target.

Specimen Self-Heating Control in WaveMatrix™ dynamic test software accepts an input of specimen temperature, which is used in a sophisticated outer-loop control of test frequency*. The user sets the target test temperature and the system then automatically adjusts the live test frequency (within user-specified limits) to achieve it. This means that at low stress levels, where each specimen survives millions of cycles, the frequency can be increased to greatly reduce the test time. Conversely, at high stress levels (where each test is several orders of magnitude shorter) the frequency must often be reduced to prevent excessive heating, but this has little effect on the overall time for the S-N dataset.

Instron asked the UK National Composites Certification and Evaluation Facility at Manchester University (NCCEF) to assess the comparability of results by producing an S-N data set using their standard method followed by a complete repetition on the same batch of material using Specimen Self-Heating Control. In two separate trials on commercial epoxy pre-preg materials with carbon fiber and e-glass fibre reinforcement (respectively), NCCEF found that the logarithmic data fitting coefficients were almost identical and that specimen temperature variation was reduced from ± 4 °C during a test to a range of less than ± 0.5 °C. On the carbon fiber reinforced material, the batch time was reduced by 15 machine-days on a total time of 55 days.

For the test laboratory struggling to fulfil demand for composites S-N curve generation, Specimen Self-Heating control offers exceptional value – the price of this small software extension can enable each machine to handle over 35% more tests.

*Thermocouples or non-contact transducers can be used.

WaveMatrix™ Brochure

WaveMatrix™ is intelligent software designed for fatigue and dynamic testing of materials and components. It delivers flexibility - run everything from a simple static ramp, to cyclic waveforms through to complex multi-step, multi-axial tests The highly visual environment with integrated tabular screens, clear menu structures, time-based matrix test preview and configurable live test workspace is designed to be intuitive and instill confidence. Packed with intelligent features, such as data reduction and built-in project organization, designed to simplify your testing.

  • Prodotti
  • 2/2/2011
  • 1.0 MB

ElectroPuls™ E1000 All-Electric Dynamic Test Instrument

The ElectroPulsTM E1000 is a state-of-the-art, all-electric test instrument designed for dynamic and static testing on a wide range of materials and components. It includes Instron® advanced digital control electronics, DynacellTM load cell, Console software, and the very latest in testing technology – hassle-free tuning based on specimen stiffness, electrically operated crosshead lifts, a T-slot table for flexible test set ups, and a host of other user-orientated features. Powered from a single-phase supply it requires no additional utilities for basic machine operation (for example, pneumatic air, hydraulics, or water).

  • Prodotti
  • 3/3/2017
  • 0.7 MB

WaveMatrix Specimen Self-Heating Control

Increase the throughput and consistency of your composites and polymers testing by optimizing the test frequency with the Specimen Self-Heating Control. This powerful add-on is specific for WaveMatrix™ Software. Composites and various other materials are prone to significant self-heating effects during cyclic loading, but their performance also shows strong temperature dependence. This has traditionally led to fatigue testing at very low frequencies to minimize specimen heating and the resultant degradation in mechanical properties. A test run for a single S/N dataset could mean weeks of machine time. Specimen Self-Heating Control can significantly reduce this, while providing previously unachievable confidence in test temperature. This patented system achieves and maintains a specified test temperature by varying test frequency in response to a specimen temperature input.

  • Prodotti
  • 2/19/2013
  • 1.1 MB

Seleziona Paese

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
INFORMAZIONI SUI CONTATTI

Via Airauda,
12 10044 Pianezza
TO Italy

Generale:  +39 011 9685 511

COLLEGAMENTI UTILI
  • Sistemi di prova
  • Software
  • Accessori
  • Catalogo
  • Biblioteca
  • Soluzioni di Prova
  • Webinar
  • Casi di studio
  • Eventi
  • Carriere
  • News
  • Glossario
Policies / Legal
  • Informativa sulla privacy e sui cookie
  • Termini di utilizzo
  • Controllo esportazioni
  • Avviso sui dati GDPR
METTITI IN CONTATTO CON NOI
REGISTRATI ALLA NOSTRA NEWSLETTER
INDIRIZZO EMAIL
© Illinois Tool Works Inc. Tutti i diritti riservati.
[email protected]
  • Informativa sulla privacy e sui cookie
  • Termini di utilizzo
  • Controllo esportazioni
  • Avviso sui dati GDPR