State-Based peridynamics for thermomechanical modeling of fracture mechanisms in nuclear fuel pellets

Liu, Qi-Qing; Wu, Dan; Madenci, Erdogan; Yin, Yilong; Hu, Yile

doi:10.1016/j.engfracmech.2022.108917

Cited by 9 publications

(2 citation statements)

References 54 publications

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“…In summary, we have established a thermoelastic hybrid PD-CCM model in Equations ( 7)-( 16), (26) and (27). The partitioning of the hybrid model is determined by the Morphing functions w(x) and v(x), and the definitions of w(x) and v(x) are independent of each other.…”

Section: Stiffness/thermal Modulus Constraint Equationsmentioning

confidence: 99%

“…Both thermal and plastic deformations should be considered in simulations of the plastic fracture of certain materials, such as superalloys. In the thermomechanical modeling of PD, Liu et al presented a thermomechanical ordinary state-based PD model to investigate the fracture mechanisms in nuclear fuel pellets [27]. Zhang et al proposed a bond-based PD, fully coupled, thermomechanical model for simulation of the fracture in quasi-brittle materials [28].…”

Section: Introductionmentioning

confidence: 99%

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Thermomechanical Peridynamic Modeling for Ductile Fracture

et al. 2023

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In this paper, we propose a modeling method based on peridynamics for ductile fracture at high temperatures. We use a thermoelastic coupling model combining peridynamics and classical continuum mechanics to limit peridynamics calculations to the failure region of a given structure, thereby reducing computational costs. Additionally, we develop a plastic constitutive model of peridynamic bonds to capture the process of ductile fracture in the structure. Furthermore, we introduce an iterative algorithm for ductile-fracture calculations. We present several numerical examples illustrating the performance of our approach. More specifically, we simulated the fracture processes of a superalloy structure in 800 ℃ and 900 ℃ environments and compared the results with experimental data. Our comparisons show that the crack modes captured by the proposed model are similar to the experimental observations, verfying the validity of the proposed model.

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Section: Stiffness/thermal Modulus Constraint Equationsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%