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A combined experimental analytical methodology for characterizing the thermoviscoplastic deformation of a metal matrix composite.

机译：一种组合的实验分析方法，用于表征金属基复合材料的热粘塑性变形。

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摘要

This dissertation research investigates the response of a fiberless thirteen layer hot isostatically pressed Ti-15-3 laminate to creep, constant strain rate, and cyclic constant strain rate loading at temperatures ranging from 482{dollar}spcirc{dollar}C to 649{dollar}spcirc{dollar}C. Creep stresses from 48 to 260 MPa and strain rates of.0001 to.01 m/m/sec were used. Material parameters for three unified constitutive models (Bodner Partom, Miller, and Walker models) were determined for Ti-15-3 from the experimental data.; Each of the three models was subsequently incorporated into a rule of mixtures and evaluated for accuracy and ease of use in predicting the thermoviscoplastic response of unidirectional metal matrix composite laminates (both 0{dollar}spcirc{dollar} and 90{dollar}spcirc).{dollar} The laminates were comprised of a Ti-15-3 matrix with 29 volume percent SCS{dollar}sb6{dollar} fibers. The predicted values were compared to experimentally determined creep and constant strain rate data. It was found that the three models generally agreed with the 0{dollar}spcirc{dollar} data, but a suspected weak fiber-matrix interface caused the models to overestimate the stiffness of the laminates in the transverse direction.
机译：本论文研究了无纤维十三层热等静压Ti-15-3层压板在482spdol {dol} C至649 {dollar的温度下对蠕变，恒定应变率和循环恒定应变率载荷的响应。 } spcirc {dollar} C。使用的蠕变应力为48到260 MPa，应变速率为.0001到0.01 m / m / sec。从实验数据中确定了Ti-15-3的三个统一本构模型（Bodner Partom，Miller和Walker模型）的材料参数。随后将这三个模型中的每一个都纳入混合规则，并评估其准确性和易用性，以预测单向金属基复合材料层压板（0 sp spcirc dol和90 sp spcirc）的热粘塑性响应。 {叠层}层压板由具有15％体积百分比的SCS {dollar} sb6 {dollar}纤维的Ti-15-3基质组成。将预测值与实验确定的蠕变和恒定应变率数据进行比较。发现这三个模型通常与0 {dollar} spcirc {dollar}数据一致，但是怀疑的弱纤维-基体界面导致模型高估了层压材料在横向上的刚度。

著录项

  • 作者

    Rogacki, John Robert.;

  • 作者单位

    University of Washington.;

  • 授予单位 University of Washington.;
  • 学科 Engineering Mechanical.; Engineering Metallurgy.; Engineering Materials Science.
  • 学位 Ph.D.
  • 年度 1992
  • 页码 248 p.
  • 总页数 248
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 机械、仪表工业;冶金工业;工程材料学;
  • 关键词

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