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Volume 34 Issue 3
Jun 2020
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Chinese Journal of High Pressure Physics  > 2020  >  34(3): 034203.
CHEN Qidong, WANG Lixiao, LIU Xin, SHEN Yichen. Damage of 3D Random Aggregate Concrete under Ultrasonic Dynamic Load[J]. Chinese Journal of High Pressure Physics, 2020, 34(3): 034203. doi: 10.11858/gywlxb.20190855
Citation: CHEN Qidong, WANG Lixiao, LIU Xin, SHEN Yichen. Damage of 3D Random Aggregate Concrete under Ultrasonic Dynamic Load[J]. Chinese Journal of High Pressure Physics, 2020, 34(3): 034203. doi: 10.11858/gywlxb.20190855
shu

Damage of 3D Random Aggregate Concrete under Ultrasonic Dynamic Load

doi: 10.11858/gywlxb.20190855
  • 1.

    School of Mechanical Engineering, Changshu Institute of Technology, Changshu 215500, Jiangsu, China

  • 2.

    School of Mechanics, Soochow University, Suzhou 215000, Jiangsu, China

  • Received Date: 11 Nov 2019
  • Rev Recd Date: 19 Nov 2019
    Abstract
  • Concrete is a heterogeneous that is composed of coarse aggregate and cement mortar. The dynamic damage process of concrete was numerically simulated by the action mechanism of ultrasonic in concrete crushing in this paper. The random placement procedure of 3D concrete aggregate was prepared by APDL and introduced into ABAQUS, and the plastic damage constitutive relationship of each phase material was applied to study concrete damage law for dynamic loading. The numerical simulation results show that with the increase of ultrasonic dynamic load, the concrete with 40% coarse aggregate can always withstand the maximum stress load. As the amplitude of ultrasonic stress wave increases, the damage value of concrete under dynamic load increases gradually, and the damage resistance is optimal when the volume fraction is 40%. When the maximum particle size of the coarse aggregate gradually increases, or the minimum particle size of the coarse aggregate increases, the concrete grading is unreasonable, resulting in unstable performance and more vulnerable to damage.

     

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