StrainMaster Digital Image Correlation Systems for Full Field Shape, Displacement and Strain

Optical Technology for Full Field Strain Measurement LaVision StrainMaster products are versatile optical measurement systems for surface displacement, strain, and shape analysis based on digital image correlation (DIC). Application areas include, but are not limited, to classical material testing (tension, compression, fatigue), dynamic material response (impact / blast loading, cyclic testing), complex deformation states (shrinkage, multi-axial loading), thermomechanical testing, and fluid-structure interaction (FSI). Providing there is optical access, StrainMaster systems offer a contactless,...

StrainMaster Product Family The StrainMaster system follows a modular concept that allows you to retrofit individual hardware and software components according to your requirements at any time. In combination with a Device Control Unit and one or more cameras, you have complete control over the acquisition and recording parameters. Alternatively, the standard software package, StrainMaster DIC, is available as a powerful standalone product capable of importing and processing images from external sources such as scanning electron microscopes. Software licenses are available as single- or multi-user...

How does Digital Image Correlation work? DIC tracks the movement and deformation of a random surface pattern as the object undergoes some sort of loading (mechanical, thermal, etc). The surface pattern may be a naturally occurring structure or an artificially created speckle pattern. The recorded images of the object surface are discretized into smaller subsets and the displacement of the pattern in each subset is tracked over time. To find the best match between the initial subset pattern and the same pattern in the deformed state, the pixel greyscale values are correlated. This is typically...

In 3D stereoscopic DIC systems two cameras view the surface of the specimen. The camera system is calibrated such that the relationship between raw and world space is known. By matching the pattern between cameras and using the calibration model, the height and z-displacement of the surface can be calculated. This depth perception system works like our eyes do. Through the two views of the object surface and calibration, the Stereo-DIC system calculates the surface shape, displacement and strains. It gives the real strain on the surface even if the object moves towards or away from the camera...

StrainMaster DIC alone, or in Combination with the DaVis 10 Platform LaVision‘s StrainMaster DIC software module is available as a standalone package or in conjunction with the research orientated DaVis 10 platform. StrainMaster DIC allows the user to acquire and process full field surface shape, displacement, and strain data. It is an easy-to-use application for routine industrial measurement or education. The software package contains all necessary modules for material analysis based on digital image correlation. StrainMaster DIC with graphical user interface Calibration At the heart of the...

Strain With the system calibrated and sequence of images collected during the test you are now able to perform the full field displacement and strain calculation. 4calculate data for the whole, or just part of the sequence 4select regions of interest or use AutoMask to automatically isolate the material surface from the background image 4test your processing scheme 4choose calculation modes which optimize displacement (and strain) precision or spatial resolution As part of the calculation process you can choose different display and strain calculation modes depending upon the test and investigation...

When is StrainMaster DIC suitable? StrainMaster DIC includes all functionality for typical quasi-static DIC testing including: 4tensile 4compression 43 and 4 point bend 4fatigue The platform supports the StrainMaster Compact and StrainMaster Portable (M-lite cameras) hardware which are perfect for quasi-static test scenarios. StrainMaster DIC includes the functionality required by most industrial users and is designed to provide a very straightforward workflow arriving at quick and accurate results. Flexure fixture, photo courtesy of Instron® A Range of Materials and Scales StrainMaster DIC is...

When do I need to add the DaVis platform? With DaVis 10 the system expandability increases allowing the user to add-on other LaVision software modules such as fluidstructure interaction (FSI) and 3D volume strain analysis (digital volume correlation). The advanced hardware management in DaVis allows control and synchronization of up to 8 cameras, triggering of multiple light sources, 8 channel analogue/digital converter and various other devices such as motorized stages. Advanced Processing Dialog Batch processing offers the possibility to evaluate several data records with identical structure...

StrainMaster DIC - DCU X - Compact Our simplest 3D DIC configuration for repeat testing, teaching, and difficult access areas. 4 StrainMaster DIC software (supports Compact hardware only; upgrade to support Portable) 4 DCU X with keyboard and mouse (optionally DCU X plus laptop for use with remote desktop) (optionally desktop PC based system incl. PTU and ADC, plus adapter) 4 StrainMaster Compact 3D DIC head StrainMaster DIC - DCU X - Portable Flexible and portable 2D or 3D DIC - a system suitable for most quasi-static test scenarios. 4 StrainMaster DIC software 4 StrainMaster Portable hardware...

DaVis - PTU X-HS - High-speed DIC Building on the flexible DaVis platform these systems have kHz temporal resolution Typically includes 4 StrainMaster DIC software 4 StrainMaster Portable hardware support module 4 upgrade to include extra capabilities of the DaVis 10 platform 4 desktop PC 4 internal PCIe or external USB PTU X 4 PTU X high-speed upgrade 4 1.25 MHz internal PCIe or external USB ADC 4 fully integrated support for Phantom, Photron, and PCO high-speed cameras 4 several kHz pulsed light sources are available 4 choice of f-mount lenses Selection of options 4 twin tripod mounting system...