بررسي تجربي و شبيه سازي لهيدگي محوري لوله هاي جدار نازك شياردار

Experimental and simulation investigation of axial crushing of grooved thin-walled tubes

Application of impact energy absorption systems in different industries especially in automotive industries as a solution to minimize the incoming impact effect to the passengers and increase the safety of vehicle, are especially significant. Thin-walled tubes due to lightness, high value of impact energy absorption, long crushing length and high ratio of energy absorption into weight have ever-increasing application as one of the effective energy absorption. In this research by carrying out experiments and finite element simulation, crushing manner, energy absorption value, mean crushing load and initial buckling load of grooved thin-walled tubes with different geometric dimensions have been investigated and compared. Simulation of tested specimens has been executed by ABAQUS 6.6 software in 3-dimensional model and explicit method. Experimental and simulation results are in a good agreement. Results demonstrate that crushing manner and absorbed energy value in axial crushing of grooved thin-walled tubes could be controlled by introducing different groove distances.