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Verification of the results of the numerical simulation of the side impact of a vehicle with a three-point bending test
Last modified: 10. 05. 2023
Abstract
Abstract The vehicle certification is necessary before car introduction to the market. Thus, crash tests are provided in order to secure protection level of passengers by car body in case of accident. Crash tests are usually expensive and time consuming, so modified experimental tests are used instead and they appears to be cost and time effective. Likewise, they allow determining the deformation properties or energy absorption level at different stress-strain states that may occur in car accident. The energy absorption, usually described by stiffness and crashworthiness, is the key request for car body components considering the material from they were made of. Otherwise the energy dispersion into the car body in case of accident is important as well. When side impact occurs in B-pillar position, the car body is stressed by bending. The modified 3-point bending test with fixed ends has been developed in our department to assess the materials for car body parts. The strip is fixed at the ends with jaws and bent until the fracture. The force and punch path are measured and used for calculation of stiffness and crashworthiness of assessed material. Experiments were performed using high strength low alloyed steel H220PD and dual phase steel DP 600. Otherwise, the passenger’s compartment is better protected by applying dual phase steel for car body parts when side impact occurs.