The DIC (Digital Image Correlation) 3D full-field strain measurement system calculates displacement and strain fields based on changes in the speckle pattern on a specimen's surface. In materials testing, DIC technology is primarily used to evaluate mechanical performance under various environmental conditions, analyzing parameters such as strength, stiffness, plasticity, elasticity, and ductility. By enabling continuous, comprehensive measurement of deformation and strain during loading, DIC technology allows for the accurate acquisition of mechanical performance data.
DIC technology offers significant advantages in specialized applications, such as measuring the mechanical properties of flexible materials, testing in high-temperature and high-pressure environments, measuring large deformations and complex deformation processes, and analyzing strain in micro-specimens. Its non-contact measurement method enables high-precision, full-field surface strain measurement, allowing for the accurate identification of points of maximum deformation and intuitive analysis of failure processes, thereby providing robust support for material performance evaluation and optimized design.
Applications of DIC technology in materials testing:
Tensile Testing
DIC technology records material elongation during tensile testing and determines strength criteria and plastic mechanical characteristics, enabling the calculation of performance indicators such as tensile strength, elongation at break, Young's modulus, and Poisson's ratio.
Compression Testing
In compression testing, DIC technology provides a clear, detailed record of the material's deformation process and calculates full-field surface strain. It is well-suited for specialized applications involving flexible materials, high-temperature and high-pressure environments, large deformations, complex deformation processes, and micro-specimen strain measurement.
Bending/Shear Testing
DIC technology is applied in 3-point and 4-point bending tests to determine parameters such as shear modulus and to observe phenomena like notch crack propagation. It offers distinct advantages, particularly when measuring high strain levels within small areas.
Interlaminar Fracture Toughness Testing
By utilizing full-field measurement and recording crack propagation behavior, DIC technology overcomes the limitations of traditional interlaminar fracture toughness testing methods, providing reliable and comprehensive data for material performance evaluation. Buckling Tests of Composite Structural Components
Using DIC technology for buckling tests on material panels yields comprehensive results, including data on geometric and material nonlinear instability.
Ultra-High Temperature Testing
DIC technology measures displacement and strain fields on specimen surfaces, making it suitable for tensile testing of aerospace materials at ultra-high temperatures up to 2600°C.
Ultra-High-Speed Testing
When paired with high-speed cameras, DIC technology enables the measurement of high-speed dynamic 3D displacement and strain fields for applications such as high-speed impact, explosions, fatigue, vibration, rotation, and trajectory tracking.
Micro-Scale Testing
DIC technology is suitable for testing micro-scale specimens (as small as 1.5 mm). Deformation images are captured via the stereomicroscope of the DIC microscopic measurement system, followed by computational analysis within the DIC software.
DIC 3D Full-Field Strain Measurement System – Materials Mechanics Testing
The XTOP3D DIC 3D full-field strain measurement system is based on Digital Image Correlation (DIC) technology. It offers non-contact measurement, provides comprehensive data results, and captures the material's deformation behavior in real-time throughout the test, making it ideal for various mechanical property tests in civil engineering materials and structures.
Tensile Testing of Concrete Materials
Tensile mechanical property testing is widely applied in fields such as material standardization, research and development, quality assurance, and structural design and analysis. Conducting tensile tests with the DIC 3D full-field strain measurement system yields a wealth of data.
The DIC 3D full-field strain measurement system allows for the acquisition of full-field strain distributions, visualizing strain variations across different regions of the material. It generates stress-strain curves to illustrate the relationship between stress and strain during loading and calculates Young's modulus and Poisson's ratio—parameters that describe material stiffness, elasticity, and deformation behavior—thereby helping researchers gain deep insight into the material's deformation mechanisms and mechanical behavior.
Tensile test of UHPC (Ultra-High Performance Concrete)
Compression Testing of Fiber-Reinforced Concrete
Fiber-reinforced concrete incorporates various fibers to enhance its properties, playing a significant role in improving the overall crack resistance and load-bearing capacity of concrete structures. Compression testing is essential for material standardization, quality assurance, and structural design and analysis.
A 3D Digital Image Correlation (DIC) full-field strain measurement system can acquire data on the material's compressive properties while recording and analyzing information such as global strain magnitudes and crack propagation paths, enabling researchers to gain a clear understanding of the material's compressive mechanical behavior.
Bending and Shear Testing of Concrete Materials
Bending and shear tests on concrete materials serve as methods to determine material performance under specified conditions. These tests provide a basis for quality control in concrete structures and the establishment of material specifications, and they also support structural design work.
A 3D full-field strain measurement system based on Digital Image Correlation (DIC) is employed in 3-point and 4-point bending tests to determine parameters such as shear modulus and notch crack propagation. DIC non-contact strain measurement technology offers distinct advantages, particularly when measuring high strain levels within small areas.
Fatigue Testing of Composite Structural Components
Composite structures can sustain damage due to fatigue even under stress levels far below the material's static strength. Under repeated cyclic loading, material damage gradually evolves into cracks; these cracks propagate until they reach a critical length, leading to structural failure when the component can no longer withstand peak loads.
In composite fatigue testing, a 3D full-field strain measurement system (DIC) comprehensively records the processes of crack initiation and evolution—including the attainment of critical crack length and the moment of fracture. Simultaneously, it analyzes the relationship between material damage and external loading, providing visual results and extensive fatigue test data for material research.
The XTOP3D DIC 3D full-field strain measurement system is used for mechanical property testing of materials. It records material elongation during tensile testing and determines strength criteria and plastic mechanical characteristics, thereby establishing performance metrics such as tensile strength, elongation at break, Young's modulus, and Poisson's ratio. Additionally, it enables full-field measurement of strength and surface strain during deformation processes—including compression, bending, and shear—providing a robust basis for material design and analysis.
