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Behavior of Concrete Under Compressive Load01:23

Behavior of Concrete Under Compressive Load

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Concrete exhibits specific behaviors under different compressive loads. Understanding this is crucial for understanding its structural integrity. When concrete undergoes uniaxial compression, it tends to develop cracks that run parallel to the direction of the force. These parallel cracks stem from localized tensile stresses that occur perpendicular to the compression direction. Additionally, angled cracks may appear due to the formation of shear planes.
As the concrete specimen fractures under...
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A Coupled Experiment-finite Element Modeling Methodology for Assessing High Strain Rate Mechanical Response of Soft Biomaterials
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基于微观结构的3D有限元素模拟冷喷涂Al-Al2O3复合涂层在准静态压缩和缩负载下的复合涂层

Saman Sayahlatifi1, Chenwei Shao1, André McDonald1

  • 1Department of Mechanical Engineering, University of Alberta, Edmonton, T6G 1H9 Canada.

Journal of thermal spray technology
|April 16, 2024
PubMed
概括
此摘要是机器生成的。

这项研究开发了有限元模型来模拟压缩下冷喷涂的-涂层. 经过验证的模型准确地预测了材料行为和故障机制,有助于未来的材料设计.

关键词:
在 Al-Al2O3 MMC 涂层中使用 Al-Al2O3.合金合金的使用情况.压缩试验 压缩试验损伤机制 损伤机制有限元模拟器有限元模拟器基于微观结构的模型

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相关实验视频

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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
  • 计算建模 计算建模

背景情况:

  • 冷喷涂金属矩阵复合材料 (MMC) 涂层,如- (Al-Al2O3) 对于各种工程应用至关重要.
  • 了解它们在负载下的机械行为对于性能预测和材料设计至关重要.
  • 现有的模型可能无法完全捕捉这些涂层对变形和故障的复杂微观结构影响.

研究的目的:

  • 为Al-Al2O3 MMC涂层开发和验证基于微结构的有限元素 (FE) 模型.
  • 研究这些涂料在缩入和准静态压缩下的机械反应.
  • 为预测变形和故障机制提供计算框架.

主要方法:

  • 在Digimat中基于微观结构特征 (粒子分数,大小,多孔性) 的3D代表体积元素 (RVE) 的生成.
  • 在ABAQUS/Explicit中实现基于物理的建模,包括粒子裂变,接口解锁和矩阵延展性故障.
  • 在准静态压缩下对Al-Al2O3涂层的实验数据进行FE模型的验证.

主要成果:

  • FE模型成功地捕获了冷喷涂Al-Al2O3涂层的应力-应变行为.
  • 计算框架准确地预测了故障机制,包括矩阵延展性故障.
  • 该模型证明了与实验结果的数量和质量一致,无论是压缩还是缩.

结论:

  • 开发的基于微结构的FE模型是分析冷喷涂Al-Al2O3 MMC涂层的机械行为的可靠工具.
  • 这个经过验证的计算框架对材料设计和预测在各种现实世界的负载条件下,如侵蚀和疲劳等性能有影响.
  • 该研究提供了一种强大的方法来理解和优化先进复合材料涂料的性能.