Finite Element Analysis and Dynamic Response of Graphene-Based Nanocomposite: For Low Velocity Impacts Applications

Portable gadgets such as laptops, mobile phones, tablets, etc. suffer extreme damages during accidental falls while in handheld states. This paper presents the study of graphene composite based casing shell with application in mobile cover and laptop casing. Using the set of nine simulation studies and the alteration in critical parameters, i.e., drop height and shell thickness and angle of inclination are being tested to find the maximum principal strain and von Mises stresses. From the study it was found that the shell thickness less than 1 mm fails in the fracture tests has limited suitability under stress application. Layer thickness of 1.5 mm has protection up to a specific height of 900 mm, whereas 2 mm thickness has versatility in defining the stress and strain levels to check for the minimum damage with minimum von Mises stress of 0.62144 MPa. The interaction of these three parameters presents a preferable composite thickness selection with maximum drop height that the material can bear before collapsing. Measured local strains give an idea of change in the state of stress and strain with variation in the angle of fall. Results achieved from simulation experiments specify the existence of strain deformities is an essential characteristic to define minimum levels for calculating the shell thickness.