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In this paper, the damage evolution and the relationship between damage
characterization and impact energy of Carbon/Epoxy composite laminates are discussed. To
achieve this purpose, low-velocity impact tests according to ASTM standard are conducted
and the data, like impact force, are obtained. Based on ABAQUS / Explicit, a finite element
model is established. In the model, the laminate is created by the solid element to better
descript the intra-laminar stress and the inter-laminar damage and the cohesive element are
introduced to model the interface. By comparing the experiment and simulation, the validity
of the simulation is verified. After simulating the impacts with a series of energy values, this
paper studies surface pit depth, delamination area and matrix damage area and provides
theoretical support for damage research and non-destructive testing.
Keywords: composite laminates; low-velocity impact; damage characterization. |
full paper (pdf, 1728 Kb)