StrainMaster Portable Full Field Measurement and Characterization of Materials, Components and Structures

Whole Surface Measurements StrainMaster systems are based around the technique known as Digital Image Correlation (DIC), which utilizes images taken using advanced CCD and CMOS Cameras of the material or component undergoing some sort of loading process. This is a non-contacting optical technique – as long as the surface is visible we are able to acquire images. Surface Pattern The optimum pattern for the technique is a random, rich in contrast, speckle pattern which is typically created with standard aerosol paints. In some cases the natural surface pattern may be suitable (e.g. concrete). By...

Advanced Hardware Synchronized with the Test Machine The StrainMaster system can be used in combination with any test machine – all that it requires is optical access to the specimen being tested. Custom mounts for test frames can be provided. The StrainMaster Controller fully synchronizes to your test machine: 4sequence start trigger 4individual data point trigger 4record analogue signals including load, cross-head displacement StrainMaster gives accurate full field results for all types of test including: Environmental Chambers The system is extremely versatile and will work in challenging...

High Temperature Testing StrainMaster is applied to many different types of materials and components. It has the flexibility to be useful in many situations, even in challenging environments. DIC measurements of a hot (800°C) exhaust manifold - with filter (left) and without filter (right) Acknowledgement: images taken during a project with KTH Royal Institute of Technology (Sweden) and Scania. With high temperature paints to pattern the surface, and through special hardware add-ons we are able to see through the infra-red glow from the hot component. Displacement and strain maps can be calculated...

Challenging environments are not restricted to high temperatures alone. It can refer to difficult optical access, or even samples contained in liquids such as saline solution for biomedical tissues. Analysis of implant-supported dental restorations (Courtesy of Dr Rodrigo Tiossi et al, Dental School of Ribeirao Preto, University of Sao Paulo, Brazil) An area where it is difficult to use strain gauges, and where the understanding of the material characteristics remains challenging is biomechanics. The example here shows the deformation of false teeth during loading which simulates chewing. Other...

::::Calibration Recording At the heart of the system the StrainMaster DIC software gives complete control and management over your data collection, processing, and reporting. The software is extremely intuitive with a logical data and menu structure. Like any device, the StrainMaster system must be calibrated for the test. This is not something that LaVision has to do though - there is no manufacturer system calibration required. You will be trained to calibrate the system; a process which typically takes less than 5 minutes when using our special calibration plates. Having focussed on the sample...

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...

Depending on the application LaVision‘s StrainMaster systems integrate different light sources and cameras: StrainMaster PortableSystem Components Standard camera * depending on system configuration LaVisionUK Ltd 2 Minton Place / Victoria Road Bicester / Oxon / OX26 6QB / United Kingdom E-Mail: [email protected] www.lavisionUK.com Phone: +44-(0)-870-997-6532 Fax: +44-(0)-870-762-6252 LaVision GmbH Anna-Vandenhoeck-Ring 19 D-37081 Gottingen / Germany E-Mail: [email protected] www.lavision.com Tel.: +49-(0)5 51-9004-0 Fax: +49-(0)551-9004-100 LaVision Inc. 211 W. Michigan Ave. / Suite 100 Ypsilanti,...