VPG-based simulation and analysis on vehicle side crash

Based on the explicit dynamic finite element theory,the virtual proving ground(VPG) based vehicle side crash is simulated.Under the VPG environment,the unit element meshes are determined for the entire vehicle CAD model,whereas the element types and material parameters,together with welding nodes,contacts and constraints,are defined.According to the ECE R95 safety regulations,a motional counterguard vehicle model,along with initial crash conditions,is established.By calling the LS-DYNA,the simulation model is calculated to attain the stress distribution,vehicle-body aberration nephogram,and energy and acceleration curves.Afterwards,the vehicle crash safety performance is obtained through simulation.Therefore,this approach sets a reference for vehicle mass assessment.