LOW-VELOCITY IMPACT DAMAGE MECHANISM OF CARBON/EPOXY COMPOSITE LAMINATES

Abstract

Abstract: In this paper, the low-velocity impact response of unidirectional and woven carbon/epoxy laminates was compared by analyzing the mechanism of impact damage. All samples are circular specimen, the stacking sequence of unidirectional laminate are _2s and _2s. The results show that the spread of impact energy is associated with the stacking sequence of composite laminate, the direction and space structure of fiber in each layer can also influence the spread of impact energy. Impact energy spread quickly in straight fiber. Compared with the woven laminate, the unidirectional laminate has lower degree of damage in the center of impact area, but it has a wider range of damage. Fiber bending will lower the speed of impact energy along the fiber axial. In the woven laminate, weaving point makes the impact energy concentrated in the central area of impact, resulting in more fiber fracture. On the other hand, the more arrangement direction of fiber in each layer, the more evenly impact energy within each layer spread. And it is helpful to reduce the impact damage of the composite material.

Key words: composite materials, low-impact damage, finite element, energy spread

CLC Number:

TB332

WU Pan, YAN Jian-hua, YU Jian-yong, GU Hai-lin. LOW-VELOCITY IMPACT DAMAGE MECHANISM OF CARBON/EPOXY COMPOSITE LAMINATES[J]. Fiber Reinforced Plastics/Composites, 2016, 0(3): 31-37.

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