Journal
COMPOSITE STRUCTURES
Volume 138, Issue -, Pages 335-341Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.compstruct.2015.12.001
Keywords
Peridynamics; PD rate-dependent constitutive model; Composite laminates; Impact velocity; Damage
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Funding
- National Natural Science Foundation of China [11172130]
- Research Fund of State Key Laboratory of Mechanics and Control of Mechanical Structures (Nanjing University of Aeronautics and Astronautics) [0215G01]
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Based on combination of the prototype microelastic brittle (PMB) model and the viscoelastic Kelvin-Voigt model, we propose a peridynamic (PD) rate-dependent constitutive equation and a new interlayer bond describing interlayer interactions of fiber reinforced composite laminate. They are used to simulate total process from low-velocity collision to high-velocity penetration appearing in composite laminate. The influences of impacting velocity on the damage pattern and damaged area of composite laminate are analyzed and discussed. The results reveal that impacting damage in composite laminate is caused by the stretching strain. With the impacting velocity increasing gradually, the damage firstly occurs at the fixed edges, subsequently on the bottom and finally on the top surface of composite laminate. Meanwhile, owing to competition between damage and damping, the damaged area of composite laminate firstly rises with an increase in impacting velocity and reaches a peak, and then decreases rapidly. (C) 2015 Elsevier Ltd. All rights reserved.
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