A 3D Cohesive Element Model for Fracture Behavior Analysis of Ceramic Tool Materials Microstructure

Yu, Hai; Huang, Chuan Zhen; Liu, Han Lian; Zou, Bin; Zhu, Hong Tao; Wang, Jun

doi:10.4028/www.scientific.net/msf.723.119

Cited by 5 publications

(1 citation statement)

References 8 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…However, if the value of K is too large, the incremental step of the explicit solution will be too small, which will impact the efficiency of the solution. The appropriate value of K can be selected by setting the value of δ ratio (δ ratio = δ f /δ 0 ) [20].…”

Section: Cohesive Element Modelmentioning

confidence: 99%

Cohesive Element Model for Fracture Behavior Analysis of Al2O3/Graphene Composite Ceramic Tool Material

Zhang

Xiao

et al. 2019

Crystals

View full text Add to dashboard Cite

The microstructure model of Al 2 O 3 /graphene (AG) composite ceramic tool material is established based on Voronoi tessellation. The cohesive element method was used to simulate the crack growth of AG. The effect of cohesive parameters at the grain boundary of Al 2 O 3 and graphene on the crack propagation was investigated. The results show that the grain strength of graphene is too high, the crack propagation to graphene grains will be hindered and cannot propagate forward. Cracks tend to spread along the paths where the crack propagation drive force was high and the resistance was low. When the interface strength between Al 2 O 3 and graphene was at the weak interface, the crack propagation path and length were relatively straight and short. The average energy release rate G C is 1.042 × 10 −3 J/m 2 , which is 2.4% higher than that of single-phase Al 2 O 3 ceramic tool materials. However, if the interface strength between Al 2 O 3 and graphene was at the strong interface, the crack propagated along graphene particles for a short distance, consuming a large amount of fracture energy. Furthermore, the crack will deflect around graphene grains, which increases the crack propagation length. The average energy release rate G C is 1.039 × 10 −3 J/m 2 , which is 2% higher than that of single-phase Al 2 O 3 ceramic tool materials.

show abstract

Section: Cohesive Element Modelmentioning

confidence: 99%