Dynamic Mechanical Properties of EPS Concrete Under Impact Loading

doi:10.1007/s12204-019-2042-1

Journal of Shanghai Jiao Tong University (Science) ›› 2019, Vol. 24 ›› Issue (1): 94-100.doi: 10.1007/s12204-019-2042-1

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Dynamic Mechanical Properties of EPS Concrete Under Impact Loading

HU Jun *(胡俊), REN Jianwei (任建伟), WU Deyi (吴德义)

(a. College of Civil Engineering; b. Provincial Key Laboratory of Building Structure and Underground Engineering of Anhui, Anhui Jianzhu University, Hefei 230601, China)
(a. College of Civil Engineering; b. Provincial Key Laboratory of Building Structure and Underground Engineering of Anhui, Anhui Jianzhu University, Hefei 230601, China)

Online:2019-02-28 Published:2019-01-28
Contact: HU Jun *(胡俊) E-mail:jhu0805@163.com

Abstract

Abstract: The finite element method (FEM) models of expanded polystyrene (EPS) concrete were established to study the relationships among dynamic damage, energy absorption and efficiency of buffering materials with varied flexible aggregate contents and impact speeds based on the existing split Hopkinson pressure bar (SHPB) experiments. Applied material indexes including damage degrees, crack rates and energy absorption capacities, and the dynamic responses of EPS concrete under impact loading were investigated. The results show that the failure types of these materials evolve from quasi-brittle destruction to flow-plastic destruction, the damage degree of EPS concrete increases with the enhancement of flexible aggregate content, and the peak of crack rate exists around the extreme point of shock velocities. The energy-absorption efficiency of EPS concrete increases nonlinearly when the EPS beads increase and the shock speed enhances, respectively.

Key words: EPS concrete| dynamic damage| crack rate| energy absorption| impact loading

摘要： The finite element method (FEM) models of expanded polystyrene (EPS) concrete were established to study the relationships among dynamic damage, energy absorption and efficiency of buffering materials with varied flexible aggregate contents and impact speeds based on the existing split Hopkinson pressure bar (SHPB) experiments. Applied material indexes including damage degrees, crack rates and energy absorption capacities, and the dynamic responses of EPS concrete under impact loading were investigated. The results show that the failure types of these materials evolve from quasi-brittle destruction to flow-plastic destruction, the damage degree of EPS concrete increases with the enhancement of flexible aggregate content, and the peak of crack rate exists around the extreme point of shock velocities. The energy-absorption efficiency of EPS concrete increases nonlinearly when the EPS beads increase and the shock speed enhances, respectively.

关键词: EPS concrete| dynamic damage| crack rate| energy absorption| impact loading

CLC Number:

TD 235.1

HU Jun *(胡俊), REN Jianwei (任建伟), WU Deyi (吴德义). Dynamic Mechanical Properties of EPS Concrete Under Impact Loading[J]. Journal of Shanghai Jiao Tong University (Science), 2019, 24(1): 94-100.

References 13

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Dynamic Mechanical Properties of EPS Concrete Under Impact Loading

Dynamic Mechanical Properties of EPS Concrete Under Impact Loading

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