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Related Concept Videos

Measurements of Strain01:27

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...
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Three-Dimensional Analysis of Strain01:29

Three-Dimensional Analysis of Strain

567
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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Bending of Curved Members - Strain Analysis01:14

Bending of Curved Members - Strain Analysis

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The mechanics of deformation in curved members, such as beams or arches, under bending moments, involve complex responses. When such a member, symmetric about the y-axis and shaped like a segment of a circle centered at point C, is subjected to equal and opposite forces, its curvature and surface lengths change significantly. This alteration results in the shift of the curvature's center from C to C', indicating a tighter curve.
The important part of bending analysis for such a member...
472
Stress-Strain Diagram01:10

Stress-Strain Diagram

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A stress-strain diagram is a crucial tool that graphically displays a material's mechanical characteristics. This diagram is derived from a tensile test performed on a carefully prepared cylindrical specimen. The specimen has two gauge marks inscribed on its central part, and the distance between these marks is known as the gauge length. The cylindrical specimen is placed in a testing machine, which applies an increasing centric load. As this load grows, so does the gauge length. This...
2.2K
Transformation of Plane Strain01:12

Transformation of Plane Strain

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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...
472
Plastic Deformations01:14

Plastic Deformations

379
It is essential to understand how structural members behave under plastic deformation when the bending stress exceeds the material's yield strength. This state of deformation permanently alters the shape of the member, in contrast to the linear elastic behavior observed before yielding. The strain at any point in the member is expressed in terms of maximum strain. Notably, the neutral axis, which coincides with the centroid during elastic bending, shifts away from the centroid under plastic...
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Related Experiment Video

Updated: Jan 8, 2026

Production of a Strain-Measuring Device with an Improved 3D Printer
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Deformation and strain measurement on origami structures with depth-guided strain analysis method.

Tianyi Guo, Jie Li, Zhaosheng Chen

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    |December 19, 2025
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    This study introduces a novel depth-guided method to accurately measure strain in complex origami structures. This technique overcomes limitations of traditional digital image correlation (DIC) for precise mechanical analysis.

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    Area of Science:

    • Materials Science
    • Robotics
    • Smart Structures

    Background:

    • Origami structures and metamaterials are gaining prominence in materials science, smart structures, and robotics.
    • Accurate mechanical property measurement is crucial for origami structure analysis, design, and application.
    • Digital Image Correlation (DIC) is a non-contact method for 3D shape, deformation, and strain analysis, but faces accuracy issues with origami's complex geometry.

    Purpose of the Study:

    • To develop a depth-guided strain analysis method for accurate deformation and strain measurement on origami structures.
    • To address the limitations of traditional DIC caused by depth discontinuities in origami.

    Main Methods:

    • A novel depth-guided strain analysis approach is proposed.
    • Data points are selected from a continuous, smooth subset guided by a depth map.
    • This method enables accurate strain computation on 3D surfaces with complex geometric features.

    Main Results:

    • The proposed method accurately measures deformation and strain on complex origami structures.
    • Experiments on a Miura-ori structure validated the method's effectiveness.
    • The technique provides a feasible experimental approach for analyzing 3D structural behavior.

    Conclusions:

    • The depth-guided strain analysis method significantly improves the accuracy of DIC for origami structures.
    • This approach offers a reliable experimental tool for understanding the mechanical behavior of complex 3D origami.
    • It facilitates advanced analysis, design, and application of origami-based materials and systems.