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相关概念视频

Bending of Members Made of Several Materials01:08

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In analyzing a structural member composed of two different materials with identical cross-sectional areas, it is crucial to understand how their distinct elastic properties affect the member's response under load. The analysis involves assessing stress and strain distributions using the transformed section concept, which accounts for variations in material properties.
Hooke's Law determines stress in each material, stating that stress is proportional to strain but varies due to each...
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Brittle materials, including glass, cast iron, and stone, exhibit unique characteristics. They fracture without considerable change in their elongation rate, indicating that their breaking and ultimate strength are equivalent. Such materials also show lower strain levels at the point of rupture. The failure in brittle materials predominantly results from normal stresses, as evidenced by the rupture created along a surface perpendicular to the applied load. These materials do not display...
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对不同材料的缩尺寸效应模型进行比较研究.

Peina Wang1, Yu Gao2, Peihuan Wang3

  • 1Department of Stomatology, Xi'an No. 3 Hospital, The Affiliated Hospital of Northwest University, Xi'an, 710018, Shaanxi, China.

Scientific reports
|August 28, 2024
PubMed
概括

本研究评估了使用正常,反向和过渡ISE数据的16个缩尺寸效应 (ISE) 模型. 尼克斯-加奥-和尼克斯-加奥-豪希尔德模型是有希望的,但需要修改以准确反向ISE预测.

关键词:
现有的模型模型.进口大小的影响 进口大小影响通常的ISE是正常的ISE.这是一个反向ISE.

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科学领域:

  • 材料科学 材料科学 材料科学
  • 机械工程 机械工程
  • 纳米技术纳米技术

背景情况:

  • 缩尺寸效应 (ISE) 在航空航天,核,微电子和医疗应用中至关重要.
  • 现有的ISE模型的复杂性和参数各不相同,需要进行比较分析以进行最佳选择.
  • 了解ISE对于小规模预测材料行为至关重要.

研究的目的:

  • 为了比较评估十六个缩尺寸效应 (ISE) 模型.
  • 为了确定正常,反向和过渡ISE现象最准确的模型.
  • 为开发改进的未来ISE模型提供见解.

主要方法:

  • 用三种类型的ISE测试数据对16个ISE模型进行评估:正常,反向和过渡.
  • 基于各种材料的确定系数 (DC) 分析模型性能.
  • 确定影响ISE模型准确性的关键因素.

主要成果:

  • 胡杰内特,尼克斯-加奥-芬格,尼克斯-加奥-豪希尔德,尼克斯-加奥-阿布-鲁布和尼克斯-加奥-基乌斯模型准确地预测了正常的ISE.
  • 具体的模型显示,对NiCSi,TC4合金和PED Ni.的逆ISE具有很高的准确性.
  • 尼克斯-加奥-尤安-,尼克斯-加奥-芬和尼克斯-加奥-豪希尔德模型在预测不同材料的正常转向逆转ISE的过渡方面表现出色.
  • 尼克斯-加奥-芬格模型实现了最高的平均直流,其次是尼克斯-加奥-豪希尔德,但两者都在逆向ISE预测方面扎.

结论:

  • 摩擦应力和塑性区域尺寸效应应应纳入未来的IEE模型.
  • 尼克斯-加奥-和尼克斯-加奥-豪希尔德模型需要进一步改进,以准确地捕捉反向ISE.
  • 在不同的材料类型和现象中全面了解ISE对于准确的材料表征至关重要.