On behalf of Dantec Dynamics, we are pleased to announce the upcoming webinar on Thursday the 25th of July, 2024, entitled;
“Fatigue testing & Thermoelastic Stress Analysis (TSA): In-situ, high-fidelity measurement imaging”
Agenda
Welcome & Introduction,
Overview of Dantec Dynamics & Solid Mechanics Portfolio,
Introduction to Thermoelastic Stress Analysis (TSA),
Application Examples of TSA,
Live Demonstration,
Introduction to the ThermoESA system,
Advantages of TSA & the ThermoESA system,
Q&A Session,
Conclusion
REGISTRATION
Follow the link to sign up for the Morning session (0830-1000 CET).
Morning Session Registration Link https://zoom.us/webinar/register/WN_WFxJHc3NTNGg7QiWxCOg5w
Follow the link to sign up for the Afternoon session (1530-1700 CET)
Afternoon Session Registration Link https://zoom.us/webinar/register/WN_8C7kLRRvRx6lJVrxKfdyqw
About TSA:
Thermoelastic Stress Analysis (TSA) is an optical, non-contact measurement technique, meaning it requires no mechanical connection to the test object surface. TSA employs a thermal imaging sensor with an advanced image processing algorithm to convert thermo-elastically induced temperature changes into an image of surface stress.
TSA has four major advantages compared to other Experimental Measurement Techniques, including;
- High Sensitivity In-Situ Measurement Capability
- Optical, Full-Field Measurements Technqiue
- Minor Surface Preparation
- Easy Finite Element Model Validation
TSA provides in-situ (semi, real-time) measurements of (progressively improving) stress images. Typically, after several minutes the sensor has achieved a thermal sensitivity sufficient to generate a high-fidelity stress field image (down to 1 millikelvin), akin to a Finite Element model simulation (depending on the load amplitude). Generally, the image quality improves as a function of the square-root of the observation time, e.g. if the processing time is quadrupled, the signal-to-noise (SNR) ratio of the measurement improves by a factor of two.
TSA requires a non-reflective (high-emissivity) surface for the generation of measurements, since high-emissivity improves thermal exitance and reduces reflection. Some objects require no supplementary coating, e.g. primed aircraft components, and 3D printed plastic (i.e. Nylon PA12) Compared to DIC, which requires a stochastic speckle pattern to be applied to the surface, TSA only requires minor surface preparation (material-surface dependant).
Since TSA only measures temperature change using one IR-camera, it can be applied to structural features of almost arbitrary complexity. This gives it a unique advantage compared to DIC, which requires the projection to be calibrated in two or more cameras, in order to retrieve 3D-strain. For TSA, the measured equivalent change in surface principle stress that allow FEA models to be easily refined and validated. Conversely to other experimental measurement techniques, that typically provide displacement and strain information, TSA provides stress information, which is better reflected in FEA modelling. TSA sensors can produce stress images that can be easily mistaken for a numerical simulation (but without all the uncertainty!)
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