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Experimental investigation of the crushing characteristics in sandwich panels in the application of light vehicles using three-point bending tests


S.Chahardoli, Trong Nhan Tran, Sayed Mahdi Hossaeini Marashi, Farshid Masoumi, Subbotina Tatyana Yu

Source title: 
Engineering Failure Analysis, 129: 105725, 2021 (ISI)
Academic year of acceptance: 

In this study, a novel type of sandwich panel with an extensive application in light vehicles is investigated.. Despite existing studies and research about the application of sandwich panels in light vehicles, there is fragmented information and data are available to address their crushing characteristics. The radiators for cooling purposes of automobiles are considered as the second involved part in frontal collisions after the bumper. These radiators, which are composed of two main parts including the tube and thin-walled fin, can be responsible for the absorption of impact energy in low-velocity crashes besides their main cooling responsibility. To determine the crushing characteristics in this study, three-point bending tests are carried out on the healthy specimens in two directions. Moreover, the crushing properties of the smallest cubic component in the radiator with the dimensions of 39 mm, were extracted experimentally. The studied specimens were used as the core of sandwich panels to absorb crushing energy with the capability of providing high efficiency. Two groups were investigated for three-point bending including Y specimens and Z specimens (Y and Z show the direction of loading in a Cartesian coordinate system). The main difference between the two groups was the arrangement of layers under the bending load. The obtained results revealed the highest energy absorption of group Y specimens under three-point bending. In this study, it was found that the crushing parameters were increased with increasing the number of cores. Also, it was observed that the crushing length of Y1 to Y4 specimens was shorter than the Z1 to Z4 specimens. In addition, it was found that the core cubic components in the radiator, attained the highest energy absorption in the case of collapsing along the Y direction. Finally, the obtained result demonstrated that the position of a radiator is playing a vital role to absorb frontal collisions as well as changing the location of the radiator helped to apply B-shaped tubes horizontally and enhanced the crushing characteristics.