Embedded Files
Experimental Testing
Experimental Testing
The E3M Lab has numerous methods for experimentally characterizing material behavior over a wide range of strain rates and applied loading conditions:
split-Hopkinson bar (SHB) for high strain rate testing of materials under tension, compression, or direct shear loading
Servo-hydraulic axial-torsional load frame, for low and intermediate rate testing of materials under tension, compression, direct shear and torsional loading
Digital Image Correlation (DIC) system for obtaining full-field deformation and strain measurements
Shimadzu HPV-X2 high speed camera, with maximum frame rate of 1,000,000 fps
Telops FAST M3K high speed infrared (IR) camera, for obtaining full-field temperature measurements at frame rates up to 100,000 fps
Tension test performed using DIC to obtain full-field strains, and utilized to determine the strain localization within the necked region
Multiphysics Modeling
Multiphysics Modeling
The E3M Lab utilizes Ansys LS-DYNA to perform finite element analysis (FEA) simulations. This allows the lab to simulate the coupled mechanical, thermal, and at times electrochemical response of materials, structures, and components like batteries as they are subjected to dynamic loading. The experimental data is used to construct FEA models which are then validated through comparison to the real-world data, and can then be used for larger structural level design and analysis.
LS-DYNA model of an LR61 alkaline battery
Closing the Loop between Experimental and Numerical Analysis
Because the E3M Lab has expertise in both experimental mechanics and numerical modeling, we are able to utilize both in an entirely complementary manner. The experimental data we generate is used to construct numerical models of the coupled mechanical/thermal/electrical behavior, and the accuracy of these models can be verified in-house through simulations of the experiments. Once validated, these numerical models can be utilized for full-scale structural analysis and also used to identify gaps in the existing knowledge regarding material behavior. This in turn allows the E3M Lab to design new experiments capable of investigating the material response under never-before-tested conditions, to enhance our knowledge of material behavior and create increasingly accurate numerical models capable of capturing the real-world complexity inherent in actual applications.
Report abuse