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مجله بین المللی جامدات و سازه ها
جزئیات رویداد
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  • impact behavior of honeycombs under combined shear-compression. part i: experiments

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    • تاریخ ارائه: 1392/01/01
    • تاریخ انتشار در تی پی بین: 1392/01/01
    • تعداد بازدید: 708
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     this paper presents a combined shear-compression impact test for soft cellular materials designed in order to investigate their behavior under impact multiaxial loadings. a large-diameter nylon split hopkinson pressure bar system (shpb) with beveled ends of different angles is used to apply the desired shear-compression combinations. the data processing methods are studied and validated by virtual testing data generated with fem simulations. a series of experiments on an aluminum honeycomb were performed at the impact velocity of about 15 m/s with the loading angles ranging from 0° (corresponding to the pure compression) to 60°. it shows a strong effect of the additional shear loading because both the initial peak and the crush strength decrease with increasing loading angles. the quasi-static shear-compression experiments were also performed using the same beveled ends on a universal instron machine and a notable strength enhancement under impact loading is observed. images captured during quasi-static and impact tests permit for the determination of the two co-existing deforming patterns under combined shear-compression and reveal the influence of the loading rate on the occurrence of these two patterns.

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