Fraunhofer Institute for Mechanics of Materials IWMCrash Dynamics
Modern CAE-assisted developments require characteristic material parameters that correspond to specific load situations in order to produce designs and assess safety. Crash-relevant material values related to the strain rate or load speed are also needed to determine vehicle crash safety or accident-related impact loads on transportation containers: we determine the values for different materials and joins via high-speed tests that involve high-speed video and infrared cameras as well as optical evaluation processes. Our component crash tests are used to validate numerical simulations and provide conclusive assessments.
Vehicle safety and misused/crashed lightweight designs: crash-like material characterization and identification of crash parameters as the basis for crash simulation material cards as well as component crash tests for verification and assessment purposes
Container safety on impact: impact load tests on samples similar to the component or the components themselves including analysis and assessment
Plant safety in the event of an accident/breakdown (fracture dynamics): fracture dynamic material characterization at high crack stress rates for the analysis of thick-walled, cracked structures
Optimizing high-speed forming processes: dynamic Nakajima deep drawing tests with detailed optical 3D deformation analyses using high-speed video cameras and ARAMIS in order to determine forming limit diagrams
Development of testing methods with which to characterize materials and joins under complex single and multi-axial loads
The use of modern high-speed metrology such as high-speed infrared measurements and 3D high-speed video analysis of rapidly changing strain fields
Characterization and assessment of lightweight constructions, joins and innovative materials on impact and in crash situations
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How to work with the Fraunhofer IWM