Aerospace

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https://dspace.lib.cranfield.ac.uk/handle/1826/20713

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Browsing Aerospace by Subject "'Aerospace Materials'"

Now showing 1 - 5 of 5
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    ItemOpen Access
    Data for the paper "Inter-fibre failure of through-thickness reinforced laminates..."
    (Cranfield University, 2018-06-18 13:00) Cui, Hao; Yasaee, Mehdi
    Data used in the paper " Hao Cui, Antonio R. Melro, Mehdi Yasaee, Inter-fibre failure of through-thickness reinforced laminates in combined transverse compression and shear load, Composites Science and Technology, 2018 "
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    ItemOpen Access
    Data supporting: 'Development of a thermal excitation source used in an active thermographic UAV platform'
    (Cranfield University, 2022-08-31 16:49) Deane, Shakeb; Tsourdos, Antonios; Avdelidis, Nico; Zolotas, Argyrios; P. V. Maldague, Xavier; Ibarra-Castanedo, Clemente; Genest, Marc; Pant, Shashank; Williamson, Alex; Withers, Stephen; Ahmadi, Mohammadali
    This work aims to address the effectivenessand challenges of using active infrared thermography (IRT) on-board an unmannedaerial vehicle (UAV) platform. The work seeks to assess the performance ofsmall low powered forms of excitation which are suitable for activethermography and the ability to locate subsurface defects on composites. Anexcitation source in the form of multiple 250 W lamps are mounted onto a UAVand are solely battery powered with a remote trigger to power cycle them.Multiple experiments address the interference from the UAV whilst performing anactive IRT inspection. The optimal distances and time required for a UAV inspection using IRT is calculated. Multiple signal processing techniques areused to analyse the composites which helps locate the sub-surface defects. It was observedthat a UAV can successfully carry the required sensors and equipment for anActive thermographic NDT inspection which can provide access to difficult areas. Most active thermographic inspection equipment is large, heavy, and expensive. Furthermore, using such equipment for inspection of complexstructures is time-consuming. For example, a cherry picker would be required toinspect the tail of an aircraft. This solution looks to assist engineersinspecting complex composite structures and could potentially significantly reduce the time and cost of a routine inspection.
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    ItemOpen Access
    Dataset for the publication: "Coupon scale Z-pinned IM7/8552 delamination tests under dynamic loading"
    (Cranfield University, 2019-08-27 15:00) Cui, Hao; R. Hallett, Stephen; Mahadik, Yusuf; K. Patridge, Ivana; Allegri, Giuliano; Anusuya Ponnusami, Sathiskumar; Petrinic, Nik
    Datasets for a paper published in Composites Part A: Applied Science and Manufacturinghttps://doi.org/10.1016/j.compositesa.2019.105565The quasi-static tests were done at velocity of around 0.01mm/sDynamic tests were conducted at norminal velocity of around 4m/s, some of the WDCB tests were done at 7m/s.
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    ItemOpen Access
    Experimental data for the dynamic inter-fibre failure of composite laminates with through-thickness reinforcement
    (Cranfield University, 2019-04-10 12:14) Cui, Hao
    Experimental data as published in "Dynamic inter-fibre failure of unidirectional composite laminates with through-thickness reinforcement" DOI: 10.1016/j.compscitech.2019.04.004
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    ItemOpen Access
    Pulsed and Vibro Thermographic results
    (Cranfield University, 2020-01-20 08:58) Deane, Shakeb; Ibarra-Castanedo, Clemente; Avdelidis, Nico; Tsourdos, Antonios; Zhang, Hai; P. V. Maldague, Xavier; Williamson, Alex; MacKley, Timothy; Yazdani Nezhad, Hamed; Davis, Maxwell
    The CFRP specimens were manufactured and purposely damaged via impact, in the Cranfield composite centre. Sample A4 was manufactured via manual woven, and the other twosamples were unidirectional. The composites consist of laying up pre-pregpiles to form a laminate stack, the material is then autoclave processed at 180oCand 7 bars for a few hours suitable for the thermoset resin cure, this isaccording to the supplier’s specification (Hexcel). There were three specimens,one that was undamaged, and two that had been impacted with a force of 15 and20 J of energy. The infrared camera used in this experiment was a FLIR Phoenix,with inSb sensor material, 3-5 mm, 640x512 pixels and allows data acquisitionat 50Hz. Thesurface of the specimens were positioned parallel to the camera lens. The data was acquired for 40 seconds with a 1.5millisecond integration time, that includes 10 frames before the flashes, plus1990 frames during cooling a total of 2000 frames where recorded. The softwareused to acquire the data was RDac from FLIR. For signal processing MATLAB andIr_view from Visiooimage inc were employed. Two advanced processing techniqueswere used; PCT (principal component thermography) and PPT (pulsed phasethermography).