| Summary: | 碩士 === 中原大學 === 機械工程學系 === 88 === In this research, a preliminary study is made to identify physical parameters that characterize the resistance of ceramic composite armors to ballistic impact. A broad literature review of previous research works is made, including one-dimensional theories, empirical observations, numerical simulations, and phenomenological studies. The FEM-based hydrocode, Zeus, is invoked to simulate the penetration of ceramic composite armors by long rods. Based on the simulation, the effects of impact parameters on the ballistic efficiency of ceramic composite armors are further investigated using a parametric analysis. The present research shows the apparent dependence of ballistic performance of ceramic composite armors on impact velocity, penetrator’s density, confinements of targets and thickness of ceramic tiles.
Another Ballistic performance of ceramic composite armor is investigated based on the one-dimensional eroding-mushrooming penetration model developed by Jones, et al. With the DOP test data reported by Anderson and Morris, the model is used to evaluate the penetration resistance and erosion efficiency of AD90 ceramic tile, erosion rate of penetrator and residual penetration depth. It is concluded that the ceramic resistance is about 2.4 times lower than those reported in literature and is conceptually equivalent to the dynamic shear strength. The residual penetration depths predicted by the Jones-Wilson model also show good agreement with the experimental data.
This research is expected to provide a basic understanding of penetration mechanics of ceramic composite armors as well as useful information for composite armor design.
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