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首頁(yè)> 外文學(xué)位 >Incorporating the plastic deformation into a micromechanical damage model for brittle materials.
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Incorporating the plastic deformation into a micromechanical damage model for brittle materials.

機(jī)譯：將塑性變形納入脆性材料的微機(jī)械損傷模型中。

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摘要

The objective of this thesis is to improve a micromechanics-based constitutive model (DCA), which was recently developed for the mechanical response of brittle materials (e.g., ceramics), by incorporating the plastic deformation of the materials. The new model (Plastic-DCA) was formulated using a general, three-dimensional continuum mechanics framework. It now accounts for not only the elastic and the crack strains, but also for the plastic deformation in the materials.;A set of computer routines has been developed to numerically implement the Plastic-DCA model. As an example, it was applied to predict the response of silicon carbide (SiC) subjected to different loading paths. The new results are compared with those predicted by the DCA model. The new model can now be applied to model the damage and failure of quasi-brittle materials which also display plastic deformation in addition to brittle damage.
機(jī)譯：本論文的目的是通過(guò)結(jié)合材料的塑性變形來(lái)改進(jìn)基于微力學(xué)的本構(gòu)模型（DCA），該模型最近被開發(fā)用于脆性材料（例如陶瓷）的機(jī)械響應(yīng)。新模型（Plastic-DCA）是使用通用的三維連續(xù)體力學(xué)框架制定的?，F(xiàn)在，它不僅考慮了彈性應(yīng)變和裂紋應(yīng)變，還考慮了材料中的塑性變形。；已經(jīng)開發(fā)了一套計(jì)算機(jī)程序來(lái)數(shù)字地實(shí)現(xiàn)Plastic-DCA模型。例如，它被用于預(yù)測(cè)碳化硅（SiC）在不同加載路徑下的響應(yīng)。將新結(jié)果與DCA模型預(yù)測(cè)的結(jié)果進(jìn)行比較?，F(xiàn)在可以將新模型應(yīng)用于模擬準(zhǔn)脆性材料的損壞和破壞，除了脆性損壞之外，準(zhǔn)脆性材料還顯示塑性變形。

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  • 作者

    Disilvestro, Daniel.;

  • 作者單位

    The University of Alabama in Huntsville.;

  • 授予單位 The University of Alabama in Huntsville.;
  • 學(xué)科 Engineering Mechanical.;Engineering Materials Science.
  • 學(xué)位 M.S.E.
  • 年度 2008
  • 頁(yè)碼 79 p.
  • 總頁(yè)數(shù) 79
  • 原文格式 PDF
  • 正文語(yǔ)種 eng
  • 中圖分類 機(jī)械、儀表工業(yè);工程材料學(xué);
  • 關(guān)鍵詞

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