Impact behavior of honeycombs under combined shear-compression. Part II: Analysis |
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Authors: | B. Hou S. Pattofatto Y.L. Li H. Zhao |
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Affiliation: | 1. School of Aeronautics, Northwestern Polytechnical University, 710072 Xi’an, China;2. Laboratoire de Mecanique et Technologie, ENS Cachan/CNRS UMR8535/UPMC Parisuniversitas/PRES UniverSud, 61 Avenue du président Wilson, 94235 Cachan Cedex, France |
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Abstract: | In this paper, a numerical virtual model of honeycomb specimen as a small structure is used to simulate its combined shear-compression behavior under impact loading. With ABAQUS/Explicit code, the response of such a structure made of shell elements is calculated under prescribed velocities as those measured in the combined shear-compression tests presented in Part I of this study.The simulated results agree well with the experimental ones in terms of overall pressure/crush curves and deformation modes. It allows for the determination of the separated normal behavior and shear behavior of honeycomb specimen under dynamic combined shear-compression. It is found that the normal strength of honeycombs decreases with increasing shearing load. Quasi-static calculations were also performed and a significant dynamic strength enhancement found in experiments was validated again in the numerical work. A crushing envelope in normal strength vs. shear strength plane was obtained on the basis of these simulations. |
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