Dynamic compressive properties of fiber mortar subjected to impact load

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Journal of Vibration and Shock ›› 2018, Vol. 37 ›› Issue (1) : 90-97.

TIAN Zhenghong1, JIANG Guilin1, SU Weihao1,Ni Jun2

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Abstract

The split Hopkinson pressure bar impact test was used to systematically study the dynamic compressive properties of fiber mortar doped with ultra-high molecular weight polyethylene (UHMWPE) and polyvinyl alcohol (PVA). The effects of strain rate and fiber type on mortar’s strength and toughness were analyzed according to the stress-strain curves during the specimen’s failure process. The results show that the comprehensive performance of UHMWPE fiber mortar is the best, that of the Japanese PVA fiber mortar is the second, and that of the domestic PVA fiber mortar is slightly poor. A simplified constitutive model with four parameters of the fiber mortar was proposed based on the theory of traditional viscoelastic damage. Comparing with the test results, it is shown that the model can well simulate the dynamic compressive stress-strain relationship of the fiber mortar subjected to impact load..

Key words

UHMWPE fiber / PVA fiber / Fiber mortar / Dynamic mechanical properties / Constitutive model

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TIAN Zhenghong1, JIANG Guilin1, SU Weihao1,Ni Jun2. Dynamic compressive properties of fiber mortar subjected to impact load[J]. Journal of Vibration and Shock, 2018, 37(1): 90-97

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