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Updated: Jun 27, 2025

Production of a Strain-Measuring Device with an Improved 3D Printer
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Production of a Strain-Measuring Device with an Improved 3D Printer

Published on: January 30, 2020

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混合BOFDA/BOCDA系统用于分布式静态和动态应变测量

Raffaele Vallifuoco, Luigi Zeni, Aldo Minardo

    Optics letters
    |May 1, 2024
    PubMed
    概括

    这项研究引入了一种新的混合传感器,用于测量光纤中的应变. 该系统能够使用高空间分辨率进行静态和动态应变分析,从而推进分布式传感能力.

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    相关概念视频

    Measurements of Strain01:27

    Measurements of Strain

    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...
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    Transformation of Plane Strain01:12

    Transformation of Plane Strain

    When analyzing elongated structures like bars subjected to uniformly distributed loads, it is essential to understand the transformation of plane strain when coordinate axes are rotated. This transformation helps to assess how material deformation characteristics vary with orientation, which is crucial in materials science and structural engineering.
    Under plane strain conditions, typical for members where one dimension significantly exceeds the others, deformations and resultant strains are...
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    Three-Dimensional Analysis of Strain01:29

    Three-Dimensional Analysis of Strain

    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...
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    Deformation of Member under Multiple Loadings01:11

    Deformation of Member under Multiple Loadings

    When a rod is made of different materials or has various cross-sections, it must be divided into parts that meet the necessary conditions for determining the deformation. These parts are each characterized by their internal force, cross-sectional area, length, and modulus of elasticity. These parameters are then used to compute the deformation of the entire rod.
    In the case of a member with a variable cross-section, the strain is not constant but depends on the position. The deformation of an...
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    Relation between Poisson's ratio, Modulus of Elasticity and Modulus of Rigidity01:15

    Relation between Poisson's ratio, Modulus of Elasticity and Modulus of Rigidity

    Deformation occurs in axial and transverse directions when an axial load is applied to a slender bar. This deformation impacts the cubic element within the bar, transforming it into either a rectangular parallelepiped or a rhombus, contingent on its orientation. This transformation process induces shearing strain. Axial loading elicits both shearing and normal strains. Applying an axial load instigates equal normal and shearing stresses on elements oriented at a 45° angle to the load axis.
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    Applications of Stress01:04

    Applications of Stress

    Consider a structure made of a boom and a rod designed to support a load. These two components are connected by a pin and stabilized by brackets and pins. The boom and the rod are detached from their supports to assess the different stresses imposed on this structure, and a free-body diagram is drawn. Then, all the forces applied, including the load acting on the structure, are identified. The reaction forces exerted on both the boom and the rod are computed using the equilibrium equations.
    The...
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