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work in the additive manufactoring laboratory

Material modelling

Material characterization for Finite Element Simulation

Five metal samples

Finite Element Method (FEM) is the most commonly used numerical method to evaluate the performance and functionality of a design. The accuracy of an FE-simulation significantly depends on the accurate characterization of the material behaviour (e.g. plasticity, fracture etc).

At the LKR, material characterization of aluminium (sheet, and extrusion) is performed using a combined experimental-numerical approach. The experimental testing program includes: Uniaxial Tension, Shear, Plain Strain Tension, and Biaxial Tension experiments.

five simulated metal samples and diagrammes

Based on the testing program, appropriate material card for FE-simulation (in LS-DYNA) is calibrated.

Finally, the material card is validated at the component level (e.g. deep drawing, axial crushing, and 3-point bending test).