Analytical and experimental studies on the low-velocity impact response and damage of composite laminates under in-plane loads with structural damping effects

作者：Choi Ik Hyeon^*; Kim In Geol; Ahn Seok Min; Yeom Chan Hong

来源：Composites Science and Technology, 2010, 70(10): 1513-1522.

DOI：10.1016/j.compscitech.2010.05.007

• Laminate
• Impact behavior
• Plate theory
• Finite element analysis (FEA)
• Damage mechanics

In this paper, low-velocity impact response and damage of composite laminates under in-plane loads are analytically and experimentally investigated. The authors recently proposed a modified displacement field of plate theory, considering the effect of initially loaded in-plane strain, and used a finite element program to analyze the structural behavior of the composite laminate. In this study, the program is upgraded to account for the structural damping effect of the laminate. A pendulum type impact test system and an in-plane loading fixture are constructed for the experimental study. The analytical and experimental impact behaviors are compared at different impact energy levels for cases with an initial in-plane tensile load and a compressive load, as well as cases without the initial in-plane load. The results show good correspondence between the analytical and experimental impact force histories. The effect of the initial in-plane load reduces for higher impact energies. The numerical estimation of the damaged area is in good agreement with the results from C-scanning experiments.

• 出版日期2010-9-30