Optimization is an effective method for enhancing the crashworthiness of cars. In a series of simulations of crash tests at Linköping University in Sweden it was possible to reduce the penetration of passenger space by a third.
Every year 47,000 people are killed in automobile accidents in the EU. This is as if a jumbo jet were to crash every third day. Such horrendous figures cry out for ever greater investments in crashworthiness. Modern optimization technique, based on so-called finite element methods, can bring us safer cars at a considerably lower cost of development.
A study carried out at the Linköping University Division of Solid Mechanics in collaboration with SAAB Automobile AB shows that it is possible to cut calculation times to one fourth of the time using traditional optimization methods. In his doctoral dissertation, Marcus Redhe describes 26 assessments that he carried out on a collision model of a SAAB 9-3. The optimization technique he used is called Space Mapping. The basis for calculations was a crash test of an American model in which the car was driven straight into a steel barrier at 56 km/h.
Åke Hjelm | alfa
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A study led by scientists of the Max Planck Institute for the Structure and Dynamics of Matter (MPSD) at the Center for Free-Electron Laser Science in Hamburg presents evidence of the coexistence of superconductivity and “charge-density-waves” in compounds of the poorly-studied family of bismuthates. This observation opens up new perspectives for a deeper understanding of the phenomenon of high-temperature superconductivity, a topic which is at the core of condensed matter research since more than 30 years. The paper by Nicoletti et al has been published in the PNAS.
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