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Acoustic emission for interlaminar toughness testing of CFRP: Evaluation of the crack growth due to burst analysis

  1. 1. 0481723 - UGN-S 2019 RIV GB eng J - Článek v odborném periodiku
    Lissek, F. - Haegerb, A. - Knoblauch, V. - Hloch, Sergej - Pude, F. - Kaufeld, M.
    Acoustic emission for interlaminar toughness testing of CFRP: Evaluation of the crack growth due to burst analysis.
    Composites Part B-Engineering. Roč. 136, č. 1 (2018), s. 55-62. ISSN 1359-8368
    Institucionální podpora: RVO:68145535
    Klíčová slova: DCB * interlaminar toughness testing * acoustic emission * CFRP * burst analysis
    Kód oboru RIV: JQ - Strojní zařízení a nástroje
    Impakt faktor: 4.920, rok: 2017

    The paper deals with interlaminar fracture toughness testing of three different types of specimens from unidirectional
    aerospace laminate M21/T800S (autoclaved and hot pressed) and the woven fabric ECG Carbon 12k
    with respect to the ASTM Standard D5582. Simultaneously the materials were monitored by acoustic emission to
    evaluate the results via burst analysis. CFRP-specimens were mounted in a CNC-machining center by a chopper
    wire. The lower wire was fixed at a load cell (KISTLER 9257 B) to measure the force development. Standard
    specification the movement speed in z-direction was set to 5 mm/min. The acoustic emission sensor iMPact XS
    with accuracy is±5% with a reference sensitivity of>1200 pC/N was fixed on the DCB-specimens with a twosided
    adhesive tape with thickness of 0,5 mm. The sensor iMPact XS has a frequency range from 1 mHz up to
    1 MHz limited to a maximum of 500 kHz. It has been found that the material properties correlate well with the
    results of the acoustic emission analysis. The burst rate reflects the manufacturing processes as it is influenced
    directly by the fibre bridging which occurs particularly for autoclaved composites. In contrast, the burst energy
    is not affected by the manufacturing process. It is only depending from the matrix properties.
    Trvalý link: http://hdl.handle.net/11104/0277228
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