Journal
POLYMERS
Volume 14, Issue 23, Pages -Publisher
MDPI
DOI: 10.3390/polym14235200
Keywords
low-velocity impact; compression after impact; composite; delamination
Categories
Funding
- National Defense Basic Research Program of China
- National Natural Science Foundation of China
- [JCKY2019205C002]
- [51875026]
- [52275231]
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A full-scale model for predicting low-velocity impact damage and compression after impact strength was established. The study found that as the impact energy reaches a certain value, the compression strength no longer decreases with the increase in impact energy, while reducing the ply thickness can effectively improve damage resistance and compression strength.
A full-scale model for predicting low-velocity impact (LVI) damage and compression after impact (CAI) strength was established based on a subroutine of the material constitutive relationship and the cohesive elements. The dynamic responses of the laminate under impact load and damage propagation under a compressive load were presented. The influences of impact energy and ply thickness on the impact damage and the CAI strength were predicted. The predicted results were compared with the experimental ones. It is shown that the predicted value of the CAI strength is in good agreement with the experimental result. As the impact energy reaches a certain value, the CAI strength no longer decreases with the increase in the impact energy. Decreasing the ply thickness can effectively improve the damage resistance and CAI strength.
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