Creep Characteristics of Corn Straw Particles Simulated Based on Burgers Model

Authors

  • Zhe Ma College of Mechanical and Electrical Engineering, Inner Mongolia Agricultural University, Hohhot 010018, China
  • Hongbo Wang College of Mechanical and Electrical Engineering, Inner Mongolia Agricultural University, Hohhot 010018, China
  • Chunguang Wang College of Mechanical and Electrical Engineering, Inner Mongolia Agricultural University, Hohhot 010018, China
  • Zhihong Yu College of Mechanical and Electrical Engineering, Inner Mongolia Agricultural University, Hohhot 010018, China

Keywords:

Corn straw, DEM, Creep characteristics, PFC, Parametric analysis

Abstract

To simulate the creep characteristics of corn straw particles under uniaxial compression, a 6-level 2D model was created using PFC 2D software according to the actual uniaxial creep test, the grain size, and shape of corn straw particles. Five groups of controlled tests were designed by the control variable method to study the influence of Maxwell body parameters Em, ηm; Kelvin body parameters Ek, ηk; and friction coefficient f on the creep curve of Burgers model. Results revealed that the creep characteristics of corn straw are affected by these 5 parameters. After multiple debugging by trial-and-error method, simulation parameters suitable for describing the creep characteristics of corn straw particles were obtained. The creep curves obtained by simulation under these parameters are consistent with those obtained by physical tests. It was shown that PFC software can not only study the creep characteristics of geotechnical materials, but also study the creep characteristics of agricultural fiber materials, which provides a reference for the subsequent rheological characteristics of biomass materials.

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Published

2023-11-03 — Updated on 2023-11-03

Issue

Vol. 19 No. 1 (2024)

Section

Research Article or Brief Communication