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مجله بین المللی جامدات و سازه ها
جزئیات رویداد
همایش ، رویداد ، ژورنال
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  • influence of applied in-plane strain on transverse thermal conductivity of 0°/90° and plain weave ceramic matrix composites

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    • تاریخ ارائه: 1392/01/01
    • تاریخ انتشار در تی پی بین: 1392/01/01
    • تعداد بازدید: 559
    • تعداد پرسش و پاسخ ها: 0
    • شماره تماس دبیرخانه رویداد: -
     a computationally economic finite-element-based stress analysis model, developed previously by the authors, has been extended to predict the thermal behaviour of ceramic matrix composites with strain-induced damage. the finite element analysis utilises a solid element to represent a homogenised orthotropic medium of a heterogeneous uni-directional tow. the non-linear multi-axial strain dependent thermal behaviour has been discretised by multi-linear curves, which have been implemented by a user defined subroutine, usdfld, in the commercial finite element package, abaqus. the model has been used to study the performance of two cmc composites: a sic (nicalon) fibre-calcium aluminosilicate (cas) matrix, 0°/90° cross-ply laminate nicalon-cas; and, carbon fibre-dual carbon-sic matrix (c/c-sic), plain weave laminate dlr-xt. the global through-thickness thermal conductivity degradation with composite uni-axial strain has been predicted. comparisons have been made between the predictions and experimental data for both materials, and good agreement has been achieved. for the nicalon-cas 0°/90° cross-ply the dominant mechanism of thermal conductivity degradation is combined fibre failure and associated wake debonding; and, for the dlr-xt plain weave the same mechanisms act in combination with out-of-plane shear failure.

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