Dynamic Analysis of Ladder Chassis Made of Composites with Different Lay-Up Sequence

The chassis of a heavyweight vehicle aids as a mainstay for supporting the body and its various parts. It contracts with the static and dynamic loads, deprived of excessive deflection or malformation. Weight lessening is now the main concern in automobile industries with growth of new composite materials and various reinforcement structures. In the present work, the proportions of an existing heavyweight vehicle frame of a TATA 1109 EX vehicle is taken for modeling and analysis. The chassis frame is primarily modeled by taking ‘C’ cross section in modeling software and then analyzed using finite element analysis. The dynamic performance is acquired for the Carbon/Epoxy composite material. Several mode shapes and their respective natural frequencies are determined so that the flaws caused by vibrations can be eliminated. Through harmonic analysis of different lay-ups such as, [0/90/45/-45], [90/0/0/90], [0/45/-45/90] and [90/0/45/45] the frequency and amplitude of vibration are determined. Then the results are compared to finalize the best lay-up sequence among them.