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Author:

Lu, D. (Lu, D..) | Song, Z. (Song, Z..) | Wang, G. (Wang, G..)

Indexed by:

EI Scopus

Abstract:

The governing equation of the original peridynamics is derived from the energy equation of work done by conservative forces, which cannot reasonably reflect the viscoelastic deformation behavior of materials and the energy dissipation of the system. To solve this problem, a peridynamics method considering the work done by non-conservative forces is proposed. The theoretical framework includes two parts: viscoelastic interaction of material points and its motion equation, and rate dependent fracture criterion of bond. In describing the movement of material points, based on the understanding of the deformation mechanism of concrete, the viscoelastic interaction model between material points is proposed. The viscoelastic motion equation is established by using the Hamilton’s principle considering energy dissipation. Using the viscoelastic peridynamics method and the energy density equivalent method of continuum mechanics, the determination methods of elastic parameters and viscous parameters are proposed. In terms of describing bond fracture and material strength, the rate dependent fracture criterion of bond is developed by using the dynamic uniaxial S criterion of concrete. Numerical experiments are conducted to investigate the functions and advantages of the viscoelastic peridynamics method proposed. The results show that the peridynamics method proposed can reasonably reflect the influence of loading rate on the deformation, strength, and cracking behavior of concrete. © 2022 Science Press. All rights reserved.

Keyword:

viscoelastic deformation mechanism peridynamics concrete strain rate effect

Author Community:

  • [ 1 ] [Lu, D.]Key Laboratory of Urban Security and Disaster Engineering, The Ministry of Education, Beijing University of Technology, Beijing, 100124, China
  • [ 2 ] [Song, Z.]Key Laboratory of Urban Security and Disaster Engineering, The Ministry of Education, Beijing University of Technology, Beijing, 100124, China
  • [ 3 ] [Wang, G.]Key Laboratory of Urban Security and Disaster Engineering, The Ministry of Education, Beijing University of Technology, Beijing, 100124, China

Reprint Author's Address:

  • [Wang, G.]Key Laboratory of Urban Security and Disaster Engineering, China

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Source :

Journal of Tongji University

ISSN: 0253-374X

Year: 2022

Issue: 9

Volume: 50

Page: 1232-1239

Cited Count:

WoS CC Cited Count: 0

SCOPUS Cited Count: 1

ESI Highly Cited Papers on the List: 0 Unfold All

WanFang Cited Count:

Chinese Cited Count:

30 Days PV: 2

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