A selective smoothed finite element method for 3D explicit dynamic analysis of the human annulus fibrosus with modified composite-based constitutive model

Yan, Xue; Wan, Detao; Hu, Dean; Han, Xu; Liu, G.R.

doi:10.1016/j.enganabound.2021.09.021

Cited by 11 publications

(5 citation statements)

References 70 publications

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“…Building on other recent studies, we have considered nonlinear elastics properties and tetrahedral element type for the model due to computational resource limitations. We aim to incorporate more realistic lumbar spine modeling in our future studies 52–55 . In addition, based on the data from different individuals and multiple models of the lumbar spine will help to validate the results of the FE studies.…”

Section: Discussionmentioning

confidence: 99%

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Stress Distribution of Different Pedicle Screw Insertion Techniques Following Single‐Segment TLIF: A Finite Element Analysis Study

Yang

Sun

Zhang

et al. 2023

Orthopaedic Surgery

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Objectives: At present, a variety of posterior lumbar internal fixation implantation methods have been developed, which makes it difficult for spine surgeons to choose. The stress distribution of the internal fixation system is one of the important indexes to evaluate these technologies. Common insertion technologies include Roy Camille, Magerl, Krag, AO, and Weinstein insertion techniques. This study aimed to compare the distribution of von Mises stresses in different screw fixation systems established by these insertion technologies.Methods: Here, the three-dimensional finite element (FE) method was selected to evaluate the postoperative stress distribution of internal fixation. Following different pedicle screw insertion techniques, five single-segment transforaminal lumbar interbody fusion (TLIF) models were established after modeling and validation of the L1-S1 vertebrae FE model. Results:By analyzing the data, we found that stress concentration phenomenon was in all the models. Additionally, Roy-Camille, Krag, AO, and Weinstein insertion techniques led to the great stress on lumbar vertebra, intervertebral disc, and screw-rod fixation systems. Therefore, we hope that the results can provide ideas for clinical work and development of pedicle screws in the future. It is worth noting that flexion, unaffected side lateral bending, and affected side axial rotation should be limited for the patients with cages implanted.Conclusions: Overall, our method obtained the results that Magerl insertion technique was the relatively safe approach for pedicle screw implantation due to its relatively dispersive stress in TLIF models.

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Section: Discussionmentioning

confidence: 99%

“…We aim to incorporate more realistic lumbar spine modeling in our future studies. [52][53][54][55] In addition, based on the data from different individuals and multiple models of the lumbar spine will help to validate the results of the FE studies.…”

Section: Strengths and Limitationsmentioning

confidence: 99%

Stress Distribution of Different Pedicle Screw Insertion Techniques Following Single‐Segment TLIF: A Finite Element Analysis Study

Yang

Sun

Zhang

et al. 2023

Orthopaedic Surgery

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“…The finite element method, often known as FEM [29][30][31][32][33], is an essential strategy for numerical analysis of a wide range of issues in civil engineering, in addition to other subfields of engineering. A significant portion of this investigation is focused on the effect of the hollow core's structure.…”

Section: Methodsmentioning

confidence: 99%

Optimization of Hollow Core Slab Strength Based on SFRC Orientation

Boushi¹,

Naimi²

2023

MMEP

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The construction industry has been broadly developed and improved over the last decades. One of the functional innovations in this sector is the employment of steel fibers. This work assesses the impacts of using Steel Fiber Reinforced Concrete (SFRC) on the properties of hollow-core slabs. The hollow core slab (HCS) is considered in this research. Also, this study explored the influence of utilizing some SFRC fractions on the characteristics of hollow-core slabs. Four case studies were addressed, including (A) Conventional concrete, (B) Concrete with Type 1 SFRC, (C) Concrete with Type 2 of SFRC with a ratio of 0.5%, and (D) Concrete with Type 2 with a portion of 1%. ANSYS software package was used to guide numerical analysis and modeling of HCS and identify major parameters that affect the HCS performance with the help of Finite Element Analysis (FEA). Depending on the numerical results, it was found that using SFRC between 0.5% and 1% in concrete tubes tested numerically provided significant rates of durability, minimized deflection, and enhanced the mechanical behavior of concrete. Furthermore, the work outcomes confirmed that optimum displacement was attained when the SFRC ratio was 1.5%, corresponding to load values of 25 kN to 200 kN. Besides, the findings affirmed that using the first type of SFRC accomplished a considerable decline in the deflection of concrete. Deflection reduction ratios of 4.16% and 6.23% were obtained after adding the first and second types of SFRC into the reinforced hollow concrete core, respectively. Meanwhile, adding the first and second types of SFRP into non-reinforced hollow concrete core accomplished a reduction portion of 12.2% and 20.39%, respectively.

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“…Later on, the combination of strain/gradient smoothing and FEM is named smoothed FEM (SFEM) 54 . SFEMs can be classified into different types based on the distinct constructions of SDs, for example, cell‐based SFEM (CS‐FEM), 58‐72 node‐based SFEM (NS‐FEM), 73‐81 edge‐based SFEM (ES‐FEM), 82‐89 face‐based SFEM, 88‐91

\alpha

FEM, 92‐94

\beta

FEM, 95,96 and selective SFEM 97‐100 . Different constructions of SDs lead to different extents of softening.…”

Section: Introductionmentioning

confidence: 99%

“…54 SFEMs can be classified into different types based on the distinct constructions of SDs, for example, cell-based SFEM (CS-FEM), [58][59][60][61][62][63][64][65][66][67][68][69][70][71][72] node-based SFEM (NS-FEM), [73][74][75][76][77][78][79][80][81] edge-based SFEM (ES-FEM), [82][83][84][85][86][87][88][89] face-based SFEM, [88][89][90][91] 𝛼FEM, [92][93][94] 𝛽FEM, 95,96 and selective SFEM. [97][98][99][100] Different constructions of SDs lead to different extents of softening. Therefore, these SFEMs perform differently due to diverse extents of softening.…”

Section: Introductionmentioning

confidence: 99%

Preconditioned smoothed numerical manifold methods with unfitted meshes

Liu,

Guan,

Tong

et al. 2023

Numerical Meth Engineering

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The numerical manifold method (NMM) has been widely utilized to solve problems involving complicated boundaries, cracks, and interfaces. Recently, strain or gradient smoothing techniques have been incorporated into NMM to improve its performance. The resulting smoothed NMMs (SNMMs) normally possess enhanced numerical properties, for example, higher accuracy, convergence, and efficiency. A challenging issue rooted in NMM and other enhanced finite element methods using unfitted meshes is the ill‐conditioning induced by extremely small cut element. In this study, we investigate the behaviors of SNMMs in the case of small cut element. It is demonstrated that the cut‐induced ill‐conditionings also exist for two types of SNMMs, namely, edge‐based SNMM and physical‐patch‐based SNMM. Furthermore, a preconditioner based on the normalization of basis functions is proposed to resolve the ill‐conditioning. Several benchmark problems demonstrate the performances of SNMMs regarding accuracy, convergence, and stability.

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A selective smoothed finite element method for 3D explicit dynamic analysis of the human annulus fibrosus with modified composite-based constitutive model

Cited by 11 publications

References 70 publications

Stress Distribution of Different Pedicle Screw Insertion Techniques Following Single‐Segment TLIF: A Finite Element Analysis Study

Stress Distribution of Different Pedicle Screw Insertion Techniques Following Single‐Segment TLIF: A Finite Element Analysis Study

Optimization of Hollow Core Slab Strength Based on SFRC Orientation

Preconditioned smoothed numerical manifold methods with unfitted meshes

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