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LaVision: Digital Volume Correlation (DVC) Systems

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LaVision: Digital Volume Correlation (DVC) Systems

LaVision’s DVC Systems provide a cutting-edge solution for 3D deformation and strain analysis within materials. Using non-destructive imaging techniques, Digital Volume Correlation (DVC) allows for precise measurement of internal deformation and strain fields, making it an ideal tool for advanced materials research and structural integrity evaluation.

  1. 3D Strain and Deformation Mapping:

    • Provides a comprehensive understanding of internal material behavior.
    • Visualizes and quantifies strain fields in 3D within the specimen.

  2. Non-Destructive Analysis:

    • Maintains specimen integrity while delivering detailed internal measurements.
    • Compatible with a variety of imaging modalities like CT scans, MRI, and optical imaging.

  3. Advanced Software:

    • Intuitive and efficient software for processing volumetric data.
    • Automated correlation algorithms for high-precision results.

  4. High-Resolution Imaging:

    • Integrates seamlessly with high-resolution imaging systems for accurate measurements.
    • Suitable for micro-scale to macro-scale volume analysis.

 

Category:

Digital Volume Correlation, 3D strain analysis, internal deformation mapping, non-destructive testing, LaVision DVC, volumetric imaging, material research, structural integrity evaluation, CT-based testing, strain fields in 3D.

LaVision: Digital Volume Correlation (DVC) Systems Overview

LaVision’s Digital Volume Correlation (DVC) Systems offer advanced 3D, non-contact analysis for the full-field measurement of displacements, strains, and deformations within three-dimensional volumes. DVC is an extension of traditional Digital Image Correlation (DIC), providing the ability to analyze complex 3D deformation behavior in materials and structures under load, making it an essential tool for various applications in materials science, mechanical engineering, and structural testing.

  1. Full-Volume Deformation Measurement

    • Unlike 2D or 3D DIC systems that only capture surface deformations, DVC systems measure internal and external deformations, offering detailed insights into the internal strain distribution within materials or structures.

  2. High Precision and Accuracy

    • The systems provide highly accurate measurements of 3D displacements and strain fields within a volume, with resolutions down to sub-micron levels. This precision is vital for critical applications, such as composite materials testing, fatigue analysis, and more.

  3. Advanced 3D Imaging

    • LaVision’s DVC systems use high-resolution 3D imaging techniques, typically combining multiple cameras or imaging setups, to capture volumetric data over a wide range of scales and from different perspectives.

  4. Non-Contact Measurement

    • As a non-contact measurement method, DVC allows for deformation analysis without physically interacting with the sample, preserving its integrity during testing.

  5. In-Depth 3D Strain and Stress Analysis

    • The system enables comprehensive analysis of not only displacements but also internal strain and stress distributions, including volumetric strain, shear strain, and more.

  6. Flexible Application

    • DVC systems can be used for a wide range of materials, including metals, polymers, composites, concrete, and biological tissues, among others.

  7. User-Friendly Software

    • LaVision’s software provides an intuitive interface for real-time data acquisition, visualization, and post-processing. It supports features like 3D visualization, automated calibration, and advanced strain mapping, making data analysis straightforward and efficient.

  8. Adaptable to Various Testing Environments

    • DVC systems can be employed in various environments, such as high-temperature testing, fatigue analysis, and dynamic load testing, offering versatility for different testing needs.
 
LaVision: Digital Volume Correlation (DVC) Systems Overview

LaVision’s Digital Volume Correlation (DVC) Systems are state-of-the-art tools for 3D volumetric strain and displacement analysis. DVC extends the capabilities of traditional 2D and 3D Digital Image Correlation (DIC) by providing full-field strain and displacement measurements throughout the entire volume of a sample, not just the surface. This allows for deeper insights into the internal behavior of materials and structures under stress or deformation, especially in complex, three-dimensional applications.

  • 3D Volumetric Measurement
    Unlike traditional 2D or 3D DIC systems, DVC measures the deformation throughout the entire volume of a test specimen, enabling the analysis of internal material behavior, including hidden cracks and internal defects.

  • Non-Contact Full-Field Analysis
    The DVC system uses high-resolution imaging to track the surface and internal deformations of a specimen without the need for physical contact, offering precise data without altering the sample.

  • High Spatial and Temporal Resolution
    Provides highly detailed measurements with both high spatial resolution for capturing small deformations and high temporal resolution for dynamic testing scenarios.

  • Advanced 3D Imaging Techniques
    Utilizes multiple high-definition cameras and laser scanners to capture comprehensive 3D volumetric data, ensuring accurate analysis even of complex geometries.

  • Real-Time Monitoring and Analysis
    DVC systems offer the ability to monitor and analyze deformations in real-time, which is valuable for immediate decision-making during experimental testing.

  • Advanced Correlation Algorithms
    LaVision’s DVC software applies sophisticated correlation algorithms that ensure precise tracking of internal deformations, even in challenging conditions like low-contrast materials or rapid testing environments.

  • Compatibility with Multiple Testing Scenarios
    The system is highly adaptable and can be used for a wide range of tests including tensile, compression, and fatigue testing, as well as for analyzing dynamic events like impact or vibration.

  • Multi-Scale and Multi-Resolution Capabilities
    Offers the ability to analyze multiple scales of deformation and adapt to varying resolutions, providing insights from both micro- and macroscopic perspectives.

  • Integrated Software for Visualization and Post-Processing
    Includes LaVision’s powerful software tools for 3D visualization, strain mapping, and advanced post-processing, enabling detailed analysis of volumetric deformation, strain distribution, and stress fields.

  • Flexibility and Customization
    The system can be tailored to fit specific experimental setups, with the flexibility to scale and adapt to different sizes and complexities of materials or specimens.

  • Dynamic Testing Support
    Designed to capture high-speed deformations, making it suitable for dynamic testing applications like impact, blast loading, and other high-rate testing scenarios.

LaVision: Digital Volume Correlation (DVC) Systems – Specifications
Core Features

  1. High Precision Displacement Measurement

    • Provides a 3D3C displacement field (3-dimensional, 3-component) across a complete volume, offering detailed material shift data.
    • Capable of yielding over one million displacement vectors per volume image pair for high-resolution analysis.

  2. Advanced Image Processing

    • Uses robust and highly accurate algorithms to calculate displacement by subdividing the volume image into interrogation volumes.
    • Advanced cross-correlation techniques with deformed interrogation volumes ensure precise displacement calculations.
    • Employs multi-pass iterations for refined results.

  3. Large Volume Reconstruction

    • Capable of handling extremely large volumes, with the system supporting reconstruction of volumes exceeding 2000 x 2000 x 2000 voxels.
    • Ideal for complex material testing involving large specimens or structures.

  4. Displacement Accuracy

    • Achieves displacement accuracy to 0.05 pixel, ensuring fine resolution even in subtle material shifts.
Software Integration and Management

  1. DaVis Software

    • Full data management and processing handled by the DaVis software platform, offering a comprehensive environment for acquisition, processing, and project management.
    • Supports both real-time and post-processing analyses, streamlining the workflow for users.

  2. User-Friendly Interface

    • The DaVis software provides intuitive tools for visualization, ensuring that users can easily interpret the displacement data across the volume.
    • It also integrates with other LaVision systems for a complete testing solution.

 

LaVision: Digital Volume Correlation (DVC) Systems – Applications

LaVision’s Digital Volume Correlation (DVC) Systems are powerful tools for three-dimensional, full-field measurement of displacement and strain, offering insights into material and structural behaviors under various test conditions. These systems are widely used across diverse scientific and industrial fields, providing accurate and comprehensive 3D deformation analysis in complex test environments.

1. Biological Research
    • Bone Research: Study of bone deformation and fracture under stress, essential for improving orthopedic implants.
    • Cell Deformation: Tracking the deformation of individual cells for tissue engineering and medical research.
    • Tissue Displacement: Monitoring soft tissue displacement for applications in surgery planning and medical device development.
  • Industries: Biomedical research, healthcare, and medical device manufacturing.
2. Geological Applications
    • Tectonic Plate Simulation: Study of deformation in geological samples to understand tectonic movements and plate boundaries.
    • Compression Tests: Monitoring rock and soil behavior under compression, valuable for earthquake and geotechnical research.
  • Industries: Earth sciences, geotechnical engineering, and environmental studies.
3. Metal Powder Characterization
    • Material Characterization: Understanding the properties of metal powders, including porosity and compaction behavior.
    • Compaction Processing: Detailed analysis of how metal powders behave under various compaction and deformation conditions.
  • Industries: Metal powder processing, additive manufacturing, and material science.
4. Structural Applications
    • Concrete Bend Tests: Monitoring the bending of concrete structures and tracking crack development for failure prediction.
    • Crack Analysis: High-resolution measurement of crack propagation and deformation in structural materials.
  • Industries: Civil engineering, structural health monitoring, and construction materials testing.
5. Composites Testing
    • Tensile Testing: Measuring the full-field deformation and strain distribution in composite materials under tensile stress.
    • Delamination Studies: Monitoring the delamination process in layered composites, crucial for aerospace, automotive, and manufacturing industries.
  • Industries: Aerospace, automotive, and materials engineering.
6. Polymers Testing
    • Rapid Prototypes: Studying the deformation behavior of 3D-printed polymers to optimize designs and manufacturing processes.
    • Transparent Media: Non-contact measurement of strain and displacement in transparent polymer materials, useful for films, foils, and packaging industries.
  • Industries: Plastics, manufacturing, and rapid prototyping.
1. What is Digital Volume Correlation (DVC)?

Digital Volume Correlation (DVC) is an advanced extension of Digital Image Correlation (DIC) that allows the measurement of full-field 3D strain and displacement inside a sample by analyzing a series of 3D images. It’s especially useful for non-destructive internal material testing and failure analysis.

DVC systems use multiple 3D images captured at different stages of deformation to analyze the changes in the internal structure of the sample. By tracking the displacement of voxel (3D pixel) patterns, DVC computes the strain fields and displacement vectors within the material volume.

LaVision DVC systems are widely used in:

  • Material testing (for understanding internal deformations under stress).
  • Aerospace (investigating internal damage in components).
  • Mechanical and civil engineering (testing of concrete, composites, and metals).
  • Biomechanics (assessing internal strain in biological tissues).
  • Research on internal fracture propagation.

While 3D DIC provides surface displacement and strain measurement using multiple cameras, DVC extends this concept by analyzing internal material behavior through 3D image stacks (volume data). DVC allows for the study of internal deformations and damage propagation inside solid objects, which 3D DIC cannot achieve.

LaVision DVC systems can test a broad spectrum of materials, including metals, polymers, ceramics, composites, concrete, and biological tissues, providing deep insight into internal deformations and failure mechanisms.

LaVision DVC systems often utilize micro-CT (Computed Tomography) or X-ray imaging techniques to capture 3D image stacks of the specimen, which are then analyzed for displacement and strain fields. The systems can also employ X-ray tomography or optical scanning to capture high-resolution volume data.

  • Non-destructive testing allows for real-time analysis without damaging the specimen.
  • Provides 3D full-field measurements of strain and displacement throughout the material.
  • Helps in predicting internal damage and failure propagation.
  • Works with complex geometries and irregular surfaces.

Enables the study of internal failure mechanisms such as cracks, voids, and delamination.

LaVision DVC systems use the DaVis Software Suite, which includes tools for:

  • Image acquisition and processing.
  • Correlation and strain analysis in 3D.
  • Visualizing internal deformations and stress distribution.

Generating displacement and strain maps.

Industries such as aerospace, automotive, civil engineering, biomechanics, and materials science benefit from LaVision DVC systems to study internal deformation, damage analysis, and structural integrity of various materials and components.

LaVision DVC systems offer high accuracy, often achieving sub-micron precision in displacement and strain measurement inside the material volume. The system’s accuracy depends on factors such as imaging resolution, sample material, and test setup.

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