TY  - EJOU
AU  - Hu, Chengbao 
AU  - Gong, Shilin 
AU  - Chen, Bin 
AU  - Zong, Zhongling 
AU  - Bao, Xingwang 
AU  - Ru, Xiaojian 

TI  - Finite Element Simulations of the Localized Failure and Fracture Propagation in Cohesive Materials with Friction
T2  - Computer Modeling in Engineering \& Sciences

PY  - 2024
VL  - 140
IS  - 1
SN  - 1526-1506

AB  - Strain localization frequently occurs in cohesive materials with friction (e.g., composites, soils, rocks) and is widely recognized as a fundamental cause of progressive structural failure. Nonetheless, achieving high-fidelity simulation for this issue, particularly concerning strong discontinuities and tension-compression-shear behaviors within localized zones, remains significantly constrained. In response, this study introduces an integrated algorithm within the finite element framework, merging a coupled cohesive zone model (CZM) with the nonlinear augmented finite element method (N-AFEM). The coupled CZM comprehensively describes tension-compression and compression-shear failure behaviors in cohesive, frictional materials, while the N-AFEM allows nonlinear coupled intra-element discontinuities without necessitating extra nodes or nodal DoFs. Following CZM validation using existing experimental data, this integrated algorithm was utilized to analyze soil slope failure mechanisms involving a specific tensile strength and to assess the impact of mechanical parameters (e.g., tensile strength, weighting factor, modulus) in soils.
KW  - FEM analysis; strong discontinuity; nonlinear; soil rupture; cohesive zone model; tension-compression-shear coupling

DO  - 10.32604/cmes.2024.048640