CompMethGlass

Purpose and goal

Within the automotive industry there´s a clear trend towards larger glass surfaces. The impact of laminated safety glass on the overall behaviour of the vehicle in the crash situations has thereby increased significantly. It is therefore crucial to develop better material models of laminated glass and its bond line. The project has developed new numerical material models for simulation of laminated glass in crash situations. Some instability issues remains, why they haven´t yet been implemented in the simulation program LS-DYNA as originally planned.

Expected results and effects

The project was expected to produce numerical models of laminated safety glass and its bond line that provides a better match between simulation and reality in crash situations. The hope was to be able to use computer simulations in development to a greater extend without having to verify with large-scale crash tests. The project didn´t come so far that the new material models could be implemented in the simulation tools, but big improvements have been made and it is expected that the models can be used in the future.

Planned approach and implementation

The project was a bilateral research collaboration between SAFER and Fraunhofer EMI in Germany. The project was divided into a ´Swedish´ and an ´international´ project group. The Swedish group concentrated on quasi-static testing, while the international group was responsible for the dynamic testing. The development of the numerical material models was conducted in a joint effort. The experiment matrix that served as a basis for the new material models proved to be more extensive and complicated than originally planned, which led to delays within the project.