TY - JOUR
T1 - A DEM investigation on crushing of sand particles containing intrinsic flaws
AU - Wu, Mengmeng
AU - Wang, Jianfeng
N1 - Funding Information:
This study was supported by General Research Fund Grant Nos. CityU 11272916 and CityU 11213517 from the Research Grants Council of the Hong Kong SAR, Research Grant No. 51779213 from the National Science Foundation of China, and the BL13W beam-line of Shanghai Synchrotron Radiation Facility (SSRF).
Funding Information:
This study was supported by General Research Fund Grant Nos. CityU 11272916 and CityU 11213517 from the Research Grants Council of the Hong Kong SAR, Research Grant No. 51779213 from the National Science Foundation of China , and the BL13W beam-line of Shanghai Synchrotron Radiation Facility (SSRF).
Publisher Copyright:
© 2020
PY - 2020/4
Y1 - 2020/4
N2 - Intrinsic flaws are an important factor affecting particle strength and breakage behavior and are closely related to the macroscopic behavior of granular soils, e.g., packing characteristics, strength, deformation, localization and failure behaviors, etc. In this paper, a novel DEM modeling approach for investigating the role of flaws on the particle crushing behavior is proposed. The idea is to use the realistic fracture surfaces obtained from the experiment as a basis for generating initial flaws in DEM in a statistical way. Firstly, nano-focus X-ray computed tomography technology was used to obtain the realistic particle information including particle morphology and a set of fracture surfaces. The particle information was then stored in several arrays and imported into the DEM to construct the particle model containing a reasonable set of initial flaws. Seven simulation cases were performed to study the role of initial flaws on the particle breakage behavior. Simulation results show that the proposed modeling approach is capable of reproducing the realistic particle breakage behaviors, including the small-strain stiffness, peak crushing load, fracture pattern and evolution of fragment shape parameters.
AB - Intrinsic flaws are an important factor affecting particle strength and breakage behavior and are closely related to the macroscopic behavior of granular soils, e.g., packing characteristics, strength, deformation, localization and failure behaviors, etc. In this paper, a novel DEM modeling approach for investigating the role of flaws on the particle crushing behavior is proposed. The idea is to use the realistic fracture surfaces obtained from the experiment as a basis for generating initial flaws in DEM in a statistical way. Firstly, nano-focus X-ray computed tomography technology was used to obtain the realistic particle information including particle morphology and a set of fracture surfaces. The particle information was then stored in several arrays and imported into the DEM to construct the particle model containing a reasonable set of initial flaws. Seven simulation cases were performed to study the role of initial flaws on the particle breakage behavior. Simulation results show that the proposed modeling approach is capable of reproducing the realistic particle breakage behaviors, including the small-strain stiffness, peak crushing load, fracture pattern and evolution of fragment shape parameters.
KW - Computed tomography
KW - CT-based DEM modeling
KW - Flaws
KW - Fracture surface
KW - Particle crushing
UR - http://www.scopus.com/inward/record.url?scp=85083865388&partnerID=8YFLogxK
U2 - 10.1016/j.sandf.2020.03.007
DO - 10.1016/j.sandf.2020.03.007
M3 - Journal article
AN - SCOPUS:85083865388
SN - 0038-0806
VL - 60
SP - 562
EP - 572
JO - Soils and Foundations
JF - Soils and Foundations
IS - 2
ER -