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Structure-property stress state dependent relationships under varying strain rates.

机译:在变化的应变速率下结构性质应力状态的依赖关系。

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摘要

In this work, the microstructural effects of stress state and strain rate dependent plasticity, damage, and failure of aluminum and magnesium alloys were examined. Several experimental techniques were employed to implement the test data into a physics-based internal state variable plasticity-damage model. Effects arising from various strain rates, stress states, and material orientations were quantified and discussed within the framework of linking microstructural features to mechanical properties. The method developed for determining structure-property relations was validated by accurately capturing the effects for a variety of materials and loading conditions. The end result is a methodology capable of predicting the onset of damage and failure for a material loaded under complex dynamic conditions.
机译:在这项工作中,研究了应力状态和应变率相关的塑性,损伤和铝和镁合金破坏的微观结构效应。几种实验技术被用来将测试数据实现为基于物理的内部状态变量可塑性-破坏模型。在将微观结构特征与机械性能联系起来的框架内,对各种应变率,应力状态和材料取向所产生的影响进行了量化和讨论。通过精确捕获各种材料和载荷条件下的影响,验证了开发用于确定结构-特性关系的方法。最终结果是一种能够预测在复杂动态条件下加载的材料的损坏和破坏的开始的方法。

著录项

  • 作者

    Tucker, Matthew Taylor.;

  • 作者单位

    Mississippi State University.;

  • 授予单位 Mississippi State University.;
  • 学科 Engineering Mechanical.;Engineering Materials Science.
  • 学位 Ph.D.
  • 年度 2009
  • 页码 104 p.
  • 总页数 104
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 机械、仪表工业;工程材料学;
  • 关键词

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