Details
| Original language | English |
|---|---|
| Article number | 118942 |
| Journal | Composite Structures |
| Volume | 358 |
| Early online date | 13 Feb 2025 |
| Publication status | Published - Mar 2025 |
Abstract
Understanding the fracture mechanisms in composite materials across scales, from nano- to micro-scales, is essential for an indepth understanding of the reinforcement mechanisms and designing the next generation of lightweight, high-strength composites. However, conventional methods struggle to model the complex fracture behavior of nanocomposites, particularly at the fiber–matrix interface. The phase-field regularized cohesive fracture model has proven to be effective in simulating crack initiation, branching, and propagation; however, capturing the cohesive fracture strength at smaller scales remains a significant challenge. This study introduces a novel approach that combines an energy-based star-convex decomposition cohesive phase-field fracture model with molecular dynamic simulations to explore the thickness dependency of nanocomposite mechanical properties. The proposed framework enables hierarchical modeling of the mechanical and fracture behaviors of carbon-nitride nanosheet-reinforced composites. The developed model could reveal complex fracture processes across different scales and highlight critical scaling effects. This methodology provides an efficient solution for uncovering hierarchical fracture mechanisms in reinforced nanocomposites, offering valuable insights into their fracture behavior and strengthening mechanisms.
Keywords
- Atomistic-continuum modeling, Carbon-nitride nanosheet, Cohesive phase-field fracture, Hierarchical multiscale modeling, Molecular dynamics, Scaling effects
ASJC Scopus subject areas
- Materials Science(all)
- Ceramics and Composites
- Engineering(all)
- Civil and Structural Engineering
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In: Composite Structures, Vol. 358, 118942, 03.2025.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Hierarchical multiscale fracture modeling of carbon-nitride nanosheet reinforced composites by combining cohesive phase-field and molecular dynamics
AU - Zhang, Qinghua
AU - Valizadeh, Navid
AU - Liu, Mingpeng
AU - Zhuang, Xiaoying
AU - Mortazavi, Bohayra
N1 - Publisher Copyright: © 2025 The Authors
PY - 2025/3
Y1 - 2025/3
N2 - Understanding the fracture mechanisms in composite materials across scales, from nano- to micro-scales, is essential for an indepth understanding of the reinforcement mechanisms and designing the next generation of lightweight, high-strength composites. However, conventional methods struggle to model the complex fracture behavior of nanocomposites, particularly at the fiber–matrix interface. The phase-field regularized cohesive fracture model has proven to be effective in simulating crack initiation, branching, and propagation; however, capturing the cohesive fracture strength at smaller scales remains a significant challenge. This study introduces a novel approach that combines an energy-based star-convex decomposition cohesive phase-field fracture model with molecular dynamic simulations to explore the thickness dependency of nanocomposite mechanical properties. The proposed framework enables hierarchical modeling of the mechanical and fracture behaviors of carbon-nitride nanosheet-reinforced composites. The developed model could reveal complex fracture processes across different scales and highlight critical scaling effects. This methodology provides an efficient solution for uncovering hierarchical fracture mechanisms in reinforced nanocomposites, offering valuable insights into their fracture behavior and strengthening mechanisms.
AB - Understanding the fracture mechanisms in composite materials across scales, from nano- to micro-scales, is essential for an indepth understanding of the reinforcement mechanisms and designing the next generation of lightweight, high-strength composites. However, conventional methods struggle to model the complex fracture behavior of nanocomposites, particularly at the fiber–matrix interface. The phase-field regularized cohesive fracture model has proven to be effective in simulating crack initiation, branching, and propagation; however, capturing the cohesive fracture strength at smaller scales remains a significant challenge. This study introduces a novel approach that combines an energy-based star-convex decomposition cohesive phase-field fracture model with molecular dynamic simulations to explore the thickness dependency of nanocomposite mechanical properties. The proposed framework enables hierarchical modeling of the mechanical and fracture behaviors of carbon-nitride nanosheet-reinforced composites. The developed model could reveal complex fracture processes across different scales and highlight critical scaling effects. This methodology provides an efficient solution for uncovering hierarchical fracture mechanisms in reinforced nanocomposites, offering valuable insights into their fracture behavior and strengthening mechanisms.
KW - Atomistic-continuum modeling
KW - Carbon-nitride nanosheet
KW - Cohesive phase-field fracture
KW - Hierarchical multiscale modeling
KW - Molecular dynamics
KW - Scaling effects
UR - http://www.scopus.com/inward/record.url?scp=85217973334&partnerID=8YFLogxK
U2 - 10.1016/j.compstruct.2025.118942
DO - 10.1016/j.compstruct.2025.118942
M3 - Article
AN - SCOPUS:85217973334
VL - 358
JO - Composite Structures
JF - Composite Structures
SN - 0263-8223
M1 - 118942
ER -