Related Experiment Video
Updated: Feb 22, 2026
08:28
Monitoring the Wall Mechanics During Stent Deployment in a Vessel
Published on: May 8, 2012
9.7K
A three-dimensional strain measurement method in elastic transparent materials using tomographic particle image
Azuma Takahashi1, Sara Suzuki2, Yusuke Aoyama1
1Department of Integrative Bioscience and Biomedical Engineering, Graduate School of Advanced Science and Engineering, Waseda University, Shinjuku, Tokyo, Japan.
Plos One
|September 15, 2017
Summary
This study introduces a novel method using tomographic particle image velocimetry (Tomo-PIV) to measure 3D strain distribution in elastic materials. The technique accurately quantifies large deformations, crucial for understanding medical device interactions with blood vessels.
Area of Science:
- Biomedical Engineering
- Materials Science
- Optical Measurement Techniques
Background:
- Mechanical interactions between medical devices and blood vessels can cause vascular strains.
- Understanding these strains is vital for identifying causes of vascular complications.
Purpose of the Study:
- To develop and validate a method for measuring the three-dimensional (3D) strain distribution in elastic materials.
- To compare the accuracy of this new method with traditional gauge strain measurements.
Main Methods:
- Utilized tomographic particle image velocimetry (Tomo-PIV) with fluorescent tracer particles in silicone specimens.
- Reconstructed 3D particle images using multiplicative algebraic reconstruction technique (MART) and calculated displacements via digital volume correlation.
- Validated accuracy using gauge strain and video-extensometry, optimizing particle density and interrogation voxel size.
Main Results:
- Established optimal parameters for Tomo-PIV: 0.014 particles/pixel density and 40x40x40 voxels with 75% overlap.
- Achieved a maximum measurement error of less than 2.5% within a 4-mm region.
- Demonstrated successful measurement of 3D strain distribution in elastic silicone under large deformation.
Conclusions:
- Successfully developed an experimental method for 3D strain measurement in elastic materials using Tomo-PIV.
- This is the first application of Tomo-PIV for 3D strain measurements in large deformation elastic materials, with validated accuracy.
Related Concept Videos
01:29Three-Dimensional Analysis of Strain
650
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...
650
01:27Measurements of Strain
2.6K
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...
2.6K
01:07Electron Microscope Tomography and Single-particle Reconstruction
2.9K
Transmission electron microscopy (TEM) can be used to determine the 3D structure of biological samples with the help of techniques such as electron microscope tomography and single-particle reconstruction. While single-particle reconstruction can examine macromolecules and macromolecular complexes in vitro conditions only, tomography permits the study of cell components or small cells in vivo.
Electron Tomography
Electron tomography can be performed either in TEM or STEM (scanning transmission...
Electron Tomography
Electron tomography can be performed either in TEM or STEM (scanning transmission...
2.9K
01:20Elastic Strain Energy for Shearing Stresses
544
As discussed in previous lessons, strain energy in a material is the energy stored when it is elastically deformed, a concept crucial in materials science and mechanical engineering. This energy results from the internal work done against the cohesive forces within the material. When a material undergoes shearing stress and corresponding shearing strain, the strain energy density, which is the energy stored per unit volume, is calculated. Within the elastic limit, where the stress is...
544