Prediction of Nonlinear Dynamic Impact Force History by Finite Element Method
Prediction of Nonlinear Dynamic Impact Force History by Finite Element Method is a scholarly work, published in 2018 in ''Journal of Engineering Science and Technology Review''. The main subjects of the publication include reaction, structural engineering, Experimental data, nonlinear system, computer simulation, damper, bolted joint, Piston, Dynamic testing, Force dynamics, impact, contact force, engineering, finite element method, bending, Load cell, restoring force, mechanics, and sheet metal. The paper presents a new methodology for prediction of nonlinear dynamic impact force by experimental and numerical methods.Conventionally in numerical simulations contact force or reaction force outputs are used for prediction of impact loads, however those are not valid for dynamic cases.Therefore, unlike in literature, load cell is modelled by spring and damper elements.In numerical analyses Johnson-Cook material model is used since it is the most suitable model for impact.To measure the impact force for different velocities, an experimental setup was built.In the experimental setup, adjustable pneumatic piston which is used as an impactor hits a fixed pin and load cell on the piston rod collects the dynamic impact force.Measured impact force is compared with the numerical simulation results.A qualitative agreement was obtained between numerical predictions and the experimental results for the lateral impact conditions.The bending and partial failure of pin during the impact test and also post-test damage photos are compared with the simulation results.