ELASTO-PLASTIC ANALYSIS NEAR THE NOTCH INTRODUCED TO THE ALUMINA CERAMIC GREEN SHEET.

Hideharu Ohara, Toshimitsu Yokobori, Keiichi Nojiri, Shinji Naitoh

    Research output: Contribution to journalArticlepeer-review

    Abstract

    Elasto-plastic finite element analysis is carried out to clarify the mechanism of the microcrack initiation when a notch is introduced in an alumina green sheet, in order to break down an IC plate after sintering with the dimension designed. Microcrack initiation depends on the material constant H/E, where H is work hardening coefficient, and E is Young's modulus. When H/E value is small, remarkable tension-compression multi-axial stress field is caused at the elastoplastic boundary region in front of the notch tip, and the singularity of principal shearing stress becomes not so remarkable. Therefore, the effect of principal shear stress becomes small and the probability of microcrack initiation ahead of the notch tip becomes large due to tension-compression multi-axial stress field.

    Original languageEnglish
    Pages (from-to)81-88
    Number of pages8
    JournalYogyo Kyokai Shi/Journal of the Ceramic Society of Japan
    Volume93
    Issue number2
    Publication statusPublished - 1985 Jan 1

    ASJC Scopus subject areas

    • Engineering(all)

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