Intelligent composite processing using variable frequency method: preliminary results

Yunchang Qiu, Valerie Adegbite, Martin Hawley

    Research output: Chapter in Book/Report/Conference proceedingChapter

    • 3 Citations

    Abstract

    An innovative variable frequency microwave processing (VFMP) method is demonstrated in this paper. An oscillator, a RF plug-in and a Travelling Wave Tube (TWT) were used to compose the variable frequency power source of the system. The output frequency ranges from 1.7 GHz to 4.3 GHz. This particular system makes use of a single mode tunable microwave cavity as an applicator. To study its electromagnetic behavior, the cavity was characterized in the frequency range of the power source. Experimental data are consistent with theoretical prediction. Placed in the fixed volume cavity, graphite/epoxy prepreg (Hercules AS4/3501-6) laminates were heated at different frequencies where empirical modes exist. These modes have a variety of heating patterns and heating rates. Some of them are complementary to each other. Four empirical modes were selected to do heating experiments using mode sweeping method, in which one mode was excited at a time in the programmable heating cycles. By selectively assigning the heating time for each mode, a very uniform heating was achieved. The temperature gradients were less than 5 °C at a temperature of 85 °C. In aid of the implementation of appropriate control algorithm, this method can provide fast, efficient and uniform microwave heating.

    Original languageEnglish (US)
    Title of host publicationInternational SAMPE Technical Conference
    PublisherSAMPE
    Pages173-183
    Number of pages11
    Volume27
    StatePublished - 1995
    EventProceedings of the 1995 27th International SAMPE Technical Conference - Albuquerque, NM, USA

    Other

    OtherProceedings of the 1995 27th International SAMPE Technical Conference
    CityAlbuquerque, NM, USA
    Period10/9/9510/12/95

    Profile

    Heating
    Accessory Nerve
    Common Bile Duct Diseases
    Acetanilides
    N-Acetylmuramoyl-L-alanine Amidase
    Keloid
    Microwave heating
    Bronchogenic Carcinoma
    Airway Obstruction
    Alkaloids
    Thermal gradients
    Buffers
    Microwaves
    Composite materials
    Traveling wave tubes
    Applicators
    Microwave frequencies
    Heating rate
    Laminates
    Graphite

    ASJC Scopus subject areas

    • Chemical Engineering(all)
    • Chemical Engineering (miscellaneous)
    • Building and Construction
    • Polymers and Plastics

    Cite this

    Qiu, Y., Adegbite, V., & Hawley, M. (1995). Intelligent composite processing using variable frequency method: preliminary results. In International SAMPE Technical Conference (Vol. 27, pp. 173-183). SAMPE.

    Intelligent composite processing using variable frequency method : preliminary results. / Qiu, Yunchang; Adegbite, Valerie; Hawley, Martin.

    International SAMPE Technical Conference. Vol. 27 SAMPE, 1995. p. 173-183.

    Research output: Chapter in Book/Report/Conference proceedingChapter

    Qiu, Y, Adegbite, V & Hawley, M 1995, Intelligent composite processing using variable frequency method: preliminary results. in International SAMPE Technical Conference. vol. 27, SAMPE, pp. 173-183, Proceedings of the 1995 27th International SAMPE Technical Conference, Albuquerque, NM, USA, 9-12 October.
    Qiu Y, Adegbite V, Hawley M. Intelligent composite processing using variable frequency method: preliminary results. In International SAMPE Technical Conference. Vol. 27. SAMPE. 1995. p. 173-183.

    Qiu, Yunchang; Adegbite, Valerie; Hawley, Martin / Intelligent composite processing using variable frequency method : preliminary results.

    International SAMPE Technical Conference. Vol. 27 SAMPE, 1995. p. 173-183.

    Research output: Chapter in Book/Report/Conference proceedingChapter

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