在曲负荷下,在板中导向波的分析和实验分析
Jonas Brettschneider1, Peter Kraemer1
1Chair of Mechanics with focus on Structural Health Monitoring, University of Siegen, Paul-Bonatz-Straße 9-11, 57076 Siegen, Germany.
Ultrasonics
|May 17, 2024
概括
这项研究模型引导波在曲负荷下的传播,扩展声弹性理论. 开发了一种使用压电传感器测量曲负荷的创新方法,该方法对温度变化具有稳定性.
科学领域:
- 结构健康监测 结构健康监测
- 材料科学 材料科学 材料科学
- 声学 声学 在声学上.
背景情况:
- 由于环境影响,解释来自压电传感器的引导波信号具有挑战性.
- 之前的研究重点是温度和单向或双向负荷;曲负荷需要进一步研究.
研究的目的:
- 扩展声弹性模型,包括非均的弹性曲负荷.
- 开发一种创新的测量方法,用于使用引导波曲负荷.
- 研究曲预应力对引导波传播的影响.
主要方法:
- 审查了声弹性的分析基础.
- 使用部分波方法扩展了对非均弹性曲负荷的衍生方程.
- 在板上使用压电传感器和不同曲负载进行实验分析,重点关注S0和A0Lamb波形.
主要成果:
- 分析结果与实验数据进行了验证.
- 证明了曲预应力对引导波传播的显著影响.
- 在分析理论和实验发现之间取得了良好的一致性.
结论:
- 开发的模型准确地预测在曲负载下引导波的行为.
- 成功开发了一种用于曲负荷的创新测量方法.
- 新的方法显示了对微小的温度波动的稳定性.
相关概念视频
Stresses under Combined Loadings
150
When analyzing a bent tube with a circular cross-section subjected to multiple forces, it is crucial to determine the stress distribution in order to maintain structural integrity under varied load conditions.
The process begins by slicing the tube at critical points and analyzing the internal forces and stress components at these sections, focusing on the centroid. Normal stresses, generated by axial forces and bending moments, are either compressive or tensile and vary across the section from...
The process begins by slicing the tube at critical points and analyzing the internal forces and stress components at these sections, focusing on the centroid. Normal stresses, generated by axial forces and bending moments, are either compressive or tensile and vary across the section from...
150
Shear and Bending Moment Diagram: Problem Solving
1.4K
When analyzing a beam supporting concentrated loads and a distributed load, drawing the shear and bending moment diagrams is essential. These diagrams help understand the internal forces and moments acting on the beam, which is crucial for designing safe and efficient structures. Follow these steps to create the shear and bending moment diagrams:
Draw a Free-Body Diagram: Start by drawing a free-body diagram of the entire beam, including the concentrated loads, distributed load, and reaction...
Draw a Free-Body Diagram: Start by drawing a free-body diagram of the entire beam, including the concentrated loads, distributed load, and reaction...
1.4K
Elastic Curve from the Load Distribution
171
The structural behavior of beams under distributed loads is critical for engineering analysis, which focuses on predicting how beams bend and react under such conditions. Different types of beams (e.g., cantilever, supported, or overhanging) behave differently under distributed load conditions.
For all beams, the analysis of the beam's reaction to distributed loads begins by understanding the relationship between a beam's load and the resulting shear forces and bending moments.
For all beams, the analysis of the beam's reaction to distributed loads begins by understanding the relationship between a beam's load and the resulting shear forces and bending moments.
171
Unsymmetric Bending - Angle of Neutral Axis
302
Unsymmetrical bending occurs when a structural member is subjected to bending moments in a plane that does not align with the member's principal axes. This scenario typically arises in beams and other structural components when loads are applied at non-ideal angles, introducing complexities in stress analysis.
When a bending moment is applied at an angle θ concerning the vertical axis of a symmetrical member, it can be resolved into components along the member's principal...
When a bending moment is applied at an angle θ concerning the vertical axis of a symmetrical member, it can be resolved into components along the member's principal...
302
Fluid Pressure over Curved Plate of Constant Width
1.6K
When a curved plate of constant width is submerged in a liquid, the pressure acting normal to the plate varies continuously both in magnitude and direction. Calculating the magnitude and location of the resultant force at a point is often challenging for such cases. One of the methods to determine the resultant force and its location involves separately calculating the horizontal and vertical components of the resultant force. This complex calculation can be simplified by representing the...
1.6K
Flexural Stress
243
When analyzing bending in symmetric members, it's crucial to understand how stresses distribute when subjected to bending moments. This stress distribution is effectively described by applying fundamental mechanics and material science principles, particularly Hooke's Law for elastic materials.
Hooke's Law states that within the material's elastic limits, stress is directly proportional to strain. In a member experiencing a bending moment, the strain at any point is relative to...
Hooke's Law states that within the material's elastic limits, stress is directly proportional to strain. In a member experiencing a bending moment, the strain at any point is relative to...
243


