Abstract
In this contribution, we summarize and extend the experimental and numerical investigation of the shock response of lightweight adobe masonry, previously published in [C. Sauer et al., J. Dyn. Behav. Mater. (submitted)]. It is demonstrated that inverse planar plate impact (PPI) experiments are feasible for lightweight adobe. From the obtained free surface velocity time curves, a linear shock velocity vs. particle velocity relation is derived within the measured range of particle velocities. Numerical simulations of these curves show that the employed homogenous numerical model is capable of properly treating the shock response of this porous, inhomogeneous, and low-strength material. This numerical model is then applied to the example of the ballistic impact of steel spheres on targets consisting of one lightweight adobe brick. The experimentally obtained penetration craters are properly reproduced by the simulated target damage. Moreover, we find good agreement of the measured and simulated residual velocities within the presented range of impact velocities.
Highlights
The investigation of the shock properties of lightweight adobe [1] is mainly motivated by applications to impact [2, 3] and blast scenarios [4]
It is demonstrated that inverse planar plate impact (PPI) experiments are feasible for lightweight adobe
This numerical model is applied to the example of the ballistic impact of steel spheres on targets consisting of one lightweight adobe brick
Summary
The investigation of the shock properties of lightweight adobe [1] is mainly motivated by applications to impact [2, 3] and blast scenarios [4]. Inverse PPI experiments with lightweight adobe specimens are described and the obtained free surface velocity time data is discussed. The simplified representation of these PPI experiments in numerical simulations is introduced and the simulated free surface velocity time curves are compared to the experimental data. In this example, a good reproduction of the experimental results is achieved by the numerical simulations. A good reproduction of the experimental results is achieved by the numerical simulations This application demonstrates the predictive capabilities of the numerical model derived in Reference [1] towards ballistic impact in the given velocity range
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