Discrete element simulation on dynamic response and damage evolution in porous ferroelectric ceramics under shock compression

JIANG Zhaoxiu; GAO Guangfa; WANG Yonggang

doi:10.11883/bzycj-2019-0410

Volume 40 Issue 5

May 2020

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JIANG Zhaoxiu, GAO Guangfa, WANG Yonggang. Discrete element simulation on dynamic response and damage evolution in porous ferroelectric ceramics under shock compression[J]. Explosion And Shock Waves, 2020, 40(5): 053103. doi: 10.11883/bzycj-2019-0410

Citation:

JIANG Zhaoxiu, GAO Guangfa, WANG Yonggang. Discrete element simulation on dynamic response and damage evolution in porous ferroelectric ceramics under shock compression[J]. Explosion And Shock Waves, 2020, 40(5): 053103. doi: 10.11883/bzycj-2019-0410

Citation:

JIANG Zhaoxiu, GAO Guangfa, WANG Yonggang. Discrete element simulation on dynamic response and damage evolution in porous ferroelectric ceramics under shock compression[J]. Explosion And Shock Waves, 2020, 40(5): 053103. doi: 10.11883/bzycj-2019-0410

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Discrete element simulation on dynamic response and damage evolution in porous ferroelectric ceramics under shock compression

doi: 10.11883/bzycj-2019-0410

JIANG Zhaoxiu^{1, 2
,},
GAO Guangfa¹,
WANG Yonggang^{2
,
,}

1.
School of Mechanical Engineering, Nanjing University of Science and Technology, Nanjing 210094, Jiangsu, China
2.
Key Laboratory of Impact and Safety Engineering, Ministry of Education of China, Ningbo University, Ningbo 315211, Zhejiang, China

Received Date: 2019-10-23
Rev Recd Date: 2019-11-24
Publish Date: 2020-05-01

Abstract

Abstract

Based on the flat-joint bonding model, the PFC (particle flow code) particle flow discrete model of porous ferroelectric ceramics under one-dimensional strain shock compression was established. The free-surface velocity profiles measured in plate impact experiments have been well reproduced by the discrete element simulation, and the response process and damage evolution mechanism of porous ferroelectric ceramics under shock compression were revealed. The response process of porous ferroelectric ceramics under shock compression can be divided into four stages: elastic deformation, failure spread, shock crushing deformation and shock Hugoniot equilibrium state. The mechanism of failure spread is the nucleation and growth of shear cracks. The main mechanism of shock crushing deformation is the formation and propagation of layered shear cracks and the collapse of voids. The impact velocity and porosity have significant effects on the dynamic response and damage evolution of porous ferroelectric ceramics. The Hugoniot elastic limit strongly depends on porosity and is not affected by impact velocity. The damage accumulation increases with the increase of impact velocity and porosity.
- ferroelectric ceramic,
- discrete element,
- damage evolution,
- dynamic response

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References(24)

References

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