Modeling of an Elastic Sphere Colliding Against an Elastic-plastic Plate Under a Continuing Action of an Outer Force.

Modeling of collision processes of colliding bodies with different properties is of particular theoretical and practical interest e.g. for modeling of plastic deformation processes. Best results regarding the parameters of the collision processes (forces, stress, strain, duration of contact, etc.) are obtained using the finite elements method (FEM). This paper presents the results of FEM modeling of the collision process after a free fall of a sphere on an elastic-plastic plate of specific dimensions under the additional application of an external force. Two cases are described: the application of an external force during the time of contact of the colliding bodies, and without application of an external force. Correlations were obtained for the change of the strength of the impact, the stress and strain as function of time for the sphere and the plate. The strain of the plate were defined for various values of the external force. These results allow us to define the conditions, necessary to perform the so called 'Combined Impact' leading to significant change of the deformation processes conditions. [ABSTRACT FROM AUTHOR]