S Halimi - Graduate M.S. Student, Department of Mechanical engineering, University of Tabriz, Tabriz, ۵۱۶۶۶-۱۴۷۶۶, Iran
H Biglari - Assistant professor, Department of Mechanical engineering, University of Tabriz, Tabriz, ۵۱۶۶۶-۱۴۷۶۶, Iran

In this paper, contact force history in low velocity impact on laminated composite with simply-supported boundary condition, using three different spring-mass models is investigated, analytically. Using two degree of freedomspring-mass model, modified spring-mass model and static model, the dynamic force of impact is calculated and then imposed on impacted place in the plate. To insure the accuracy of the present models, the contact force historyvalidated with experimental results available in literature. The results indicated that changing the mass of impactor and velocity has significant effect on impact response and three models are in a good agreement with each other.

Impact force history, Dynamic response, Spring-mass model, Static model, linearized Hertzian contact law