使用高速3D DIC用于旋转组件的位移和应变测量
Kamil Pazur1, Paweł Bogusz2, Wiesław Krasoń2
1Łukasiewicz Research Network, Institute of Aviation, Al. Krakowska 110/114, 02-256 Warsaw, Poland.
Materials (Basel, Switzerland)
|September 13, 2025
概括
3D数字图像相关性 (DIC) 精确地测量螺旋在旋转过程中的位移,尽管应变测量有局限性. 这种非接触式方法为监控复杂的旋转元件提供了潜力.
科学领域:
- 机械工程 机械工程
- 材料科学 材料科学 材料科学
- 实验力学 实验力学 实验力学
背景情况:
- 传统的张力计在测量旋转元件方面存在局限性,包括物理干扰和受限制的测量点.
- 精确的应变和位移测量对于了解螺旋等旋转结构的性能和完整性至关重要.
研究的目的:
- 评估3D数字图像关联 (DIC) 在角运动期间测量螺旋的位移和应变的有效性.
- 为了将3D DIC应变测量与旋转部件的传统应变仪数据进行比较.
- 为了解决在旋转结构中延展测量的未经探索的领域.
主要方法:
- 使用非接触式3D DIC技术与高速摄像机捕捉表面位移和变形.
- 对模型飞机螺旋进行实验,在定制的测试台上进行部分角运动.
- 将3D DIC应变测量与应变仪数据进行比较,以评估准确性和可靠性.
主要成果:
- 3D DIC实现了精确的位移测量,噪声水平为±10微米.
- 使用3D DIC进行的应变测量显示噪声范围在26至174μm/m之间,这表明有局限性.
- 张力计数据用于验证和校准DIC测量程序.
结论:
- 3D DIC显示了监控旋转元件的巨大潜力,特别是对位移的监控.
- 在旋转部件上使用3D DIC进行延展测量的准确性需要进一步的研究和潜在的改进.
- 这项研究强调了非接触式方法对于分析工程元件中复杂动态行为的重要性.
相关概念视频
Three-Dimensional Analysis of Strain
587
Three-dimensional strain analysis is crucial for understanding how materials deform under stress, particularly in elastic, homogeneous materials. This method employs principal stress axes to simplify complex stress states into more understandable forms. Subjected to stress, a small cubic element within a material either expands or contracts along these axes, transforming into a rectangular parallelepiped. This transformation effectively illustrates the material's deformation. The principal...
587
Measurements of Strain
2.5K
Strain quantifies the deformation of a material under force, typically measured as normal strain, which represents the change in length when compared with the original length. Electrical strain gauges are used for enhanced accuracy. These devices consist of a conductive wire mounted on a paper backing that adheres to the material's surface. These gauges operate on the piezoresistive effect, where the wire's electrical resistance changes in response to mechanical deformation. The strain...
2.5K
Relative Motion Analysis using Rotating Axes-Problem Solving
704
Consider a crane whose telescopic boom rotates with an angular velocity of 0.04 rad/s and angular acceleration of 0.02 rad/s2. Along with the rotation, the boom also extends linearly with a uniform speed of 5 m/s. The extension of the boom is measured at point D, which is measured with respect to the fixed point C on the other end of the boom. For the given instant, the distance between points C and D is 60 meters.
Here, in order to determine the magnitude of velocity and acceleration for point...
Here, in order to determine the magnitude of velocity and acceleration for point...
704
Relative Motion Analysis using Rotating Axes
881
Consider a component AB undergoing a linear motion. Along with a linear motion, point B also rotates around point A. To comprehend this complex movement, position vectors for both points A and B are established using a stationary reference frame.
However, to express the relative position of point B relative to point A, an additional frame of reference, denoted as x'y', is necessary. This additional frame not only translates but also rotates relative to the fixed frame, making it...
However, to express the relative position of point B relative to point A, an additional frame of reference, denoted as x'y', is necessary. This additional frame not only translates but also rotates relative to the fixed frame, making it...
881
Relative Motion Analysis using Rotating Axes - Acceleration
754
Consider a component AB undergoing a linear motion. Along with a linear motion, point B also rotates around point A. To comprehend this complex movement, position vectors for both points A and B are established using a stationary reference frame. The absolute velocity of point B is determined by adding the absolute velocity of point A, the relative velocity of point B in the rotating frame, and the effects caused by the angular velocity within the rotating frame.
Time differentiation is...
Time differentiation is...
754
Deformation in a Circular Shaft
874
One of the distinctive characteristics of circular shafts is their ability to maintain their cross-sectional integrity under torsion. In other words, each cross-section continues to exist as a flat, unaltered entity, simply rotating like a solid, rigid slab. To understand the distribution of shearing stress within such a shaft, consider a cylindrical section inside this circular shaft. This section has a length of L and a radius of R, with one end fixed. The radius of the cylindrical section is...
874


