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相关概念视频

Prismatic Beams: Problem Solving01:15

Prismatic Beams: Problem Solving

108
In the design of a supported timber beam subjected to a distributed load, both the beam's physical dimensions and the timber's characteristics, such as its grade and species, are critical. These factors determine the allowable stress values, which are crucial for calculating the necessary beam depth to ensure structural integrity and safety.
The design begins with analyzing the beam as a free body to identify moments and force balances, thereby determining support reactions. Next, the...
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Design of Prismatic Beams for Bending01:23

Design of Prismatic Beams for Bending

220
The design of prismatic beams, structural elements with a uniform cross-section, focuses on ensuring safety and structural integrity under load. The design process begins by determining the allowable stress, either from material properties tables, or by dividing the material's ultimate strength by a safety factor. This safety factor is essential for accommodating uncertainties, and varies depending on the material—timber, steel, or concrete—with each having unique strength and...
220
Beams with Unsymmetric Loadings01:17

Beams with Unsymmetric Loadings

113
Analyzing a supported beam under unsymmetrical loadings is essential in structural engineering to understand how beams respond to varied force distributions. This analysis involves calculating the deflection and identifying points where the slope of the beam is zero, which are crucial for ensuring structural stability and functionality.
The first moment-area theorem determines the slope at any point on the beam. This theorem indicates that the change in slope between two points on a beam...
113
Shearing Stresses in a Beam: Problem Solving01:14

Shearing Stresses in a Beam: Problem Solving

173
A cantilever beam with a rectangular cross-section under distributed and point loads experiences shearing stresses. The analysis begins by identifying the loads acting on the beam. Then, the reactions at the beam's fixed end are calculated using equilibrium equations. The vertical reaction is a combination of the distributed and point loads, while the moment reaction is the sum of their moments. The shear force distribution along the beam, resulting from these loads, is established by...
173
Beams01:30

Beams

1.3K
Beams are integral components of structural engineering and construction, designed to support loads applied at various points along their length. These long, straight members can be classified based on geometry, cross-section, support type, and equilibrium condition.
Based on geometry, beams can be straight, tapered, or curved. Straight beams are the most common type and have a constant cross-section throughout their length. Tapered beams, on the other hand, have a varying cross-section along...
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Bending of Members Made of Several Materials01:08

Bending of Members Made of Several Materials

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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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传感器增强的厚层复合体梁:制造,测试和数值分析

Mustafa Basaran1,2, Halit Suleyman Turkmen3, Mehmet Yildiz4

  • 1Department of Material Science and Engineering, Ayazaga Campus, Istanbul Technical University, Maslak 34469, Istanbul, Türkiye.

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概括

这项研究开发了用于汽车叶弹的超厚复合体梁,集成了纤维支架格子 (FBG) 传感器用于结构健康监测和验证非线性有限元素模型.

关键词:
固化和后固化的分析.动态和静态测试 动态和静态测试复合材料中的外热反应纤维布朗格 (FBG) 传感器的传感器有限元素分析 (FEA) 的方法很大的偏移偏移.在材料工程中集成传感器.压力 压力 压力 压力结构性健康监测 (SHM) 是一种结构性健康监测.厚层复合材料梁 厚层复合材料梁三点曲疲劳测试试验 曲疲劳测试

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科学领域:

  • 材料科学与工程 材料科学与工程
  • 机械工程 机械工程
  • 结构健康监测 结构健康监测

背景情况:

  • 开发用于汽车应用的高性能聚合物矩阵复合材料 (PMC) 叶弹需要了解超厚复合材料梁的行为.
  • 在复合材料制造过程中监测内部应变和外热反应对于质量控制至关重要.

研究的目的:

  • 研究超厚PMC光束的制造,测试和分析.
  • 开发和验证一个非线性有限元素 (FE) 模型,用于预测这些光束的大偏斜行为.
  • 探索纤维支格 (FBG) 传感器在复合结构中用于结构健康监测 (SHM) 的应用.

主要方法:

  • 制造超厚层压 PMC 梁.
  • 集成纤维支格 (FBG) 传感器和热电偶 (TCs) 进行现场监控.
  • 静态三点曲试验,以使用张力计 (SG) 确定校准系数 (CC).
  • 开发一个几何非线性FE模型 (GNA) 来分析大偏差 (LD) 效应.
  • 使用FBG传感器进行疲劳测试,用于SHM在三点曲下.

主要成果:

  • 一个经过验证的FE模型准确地预测了超厚复合体梁的变形行为和内部应变分布.
  • FBG 传感器数据与 FE 分析和 SG 测量有很好的相关性.
  • 随着位移范围的增加,疲劳性能显著下降,突出显示了SHM的重要性.
  • FBG传感器显示了复合材料中增强SHM的潜力.

结论:

  • 使用先进的监测和建模技术,可以制造和分析超厚复合体梁.
  • 开发的非线性FE模型为复合梁的大偏斜行为提供了有价值的见解.
  • FBG传感器为结构健康监测和复合结构的智能维护提供了有希望的方法,特别是在疲劳负荷下.