A B-spline based heterogeneous modeling and analysis of proximal femur with graded element

Pise, Uday V.; Bhatt, Amba D.; Srivastava, Ragini; Warkedkar, Ravi

doi:10.1016/j.jbiomech.2009.05.019

Cited by 10 publications

(8 citation statements)

References 29 publications

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“…Undoubtedly there is a need to carry out extensive study with meaningful model definition on a number of specimens. As stated in our previous study (Pise et al [20]) some FE results are inconsistent at high degrees of freedom. This is due to low aspect ratio in some distorted elements in top slices of the proximal femur.…”

Section: Comparison Of Fe Models Vs Experimental Strain Findingsmentioning

confidence: 48%

“…The developed heterogeneous solid model of proximal femur with graded element is used for FE analysis after the convergence test. To carry out convergence test the twelve BSBHG models have been generated using varying mesh density for single-legged stance loading and boundary conditions [20]. The convergence test result showed that FE results of BSBHG model get optimized between 60,000 to 86,250 degrees of freedom.…”

Section: Model Generation and Determination Of Materials Propertiesmentioning

confidence: 99%

“…While Peng et al [19] have attempted to investigate the effects of orthotropic material property assignment over isotropic model under two load conditions, no attempt has been seen to compare the effects of different orthotropic relations, proposed in literature, to study the biomechanical response of the bone. In our previous study Pise et al [20], we have presented B-spline based heterogeneous graded (BSBHG) FE model of human proximal femur, where the analysis was carried out with linear isotropic graded element. The model was tested for biomechanical response in simple stance load condition.…”

Section: Introductionmentioning

confidence: 99%

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Influence of Isotropic and Orthotropic Relationships on the Accuracy of B-spline Based Heterogeneous Graded Finite Element Modeling of Proximal Femur

Pise¹,

Bhatt²,

Srivastava³

2012

Computer-Aided Design and Applications

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Bone is a highly heterogeneous object. Its composition and structure both vary and depends upon skeletal site, physiological function and age. The goal of this study is to investigate the importance of including material anisotropy in B-Spline based heterogeneous graded (BSBHG) FE model of proximal femur. Five different BSBHG FE models are developed. Out of these five models, four are orthotropic models and one is isotropic model. Each model is simulated in simple stance load condition and their biomechanical response is evaluated and compared with each other as well as those of experimental results given in one of the reference paper for the same specimen in simple stance load condition. The Lagrangian graded element approach is used to assign inhomogeneous isotropic and orthotropic elastic constants in finite element model to improve the performance. Based on the analysis of the two parameters, maximum equivalent Von Mises stress and the displacement in 'z' direction, comparison is achieved. The displacement and Von Mises results have shown that there is small difference between one of the orthotropic model and the isotropic model while the displacement results of the other two orthotropic models show good agreement with the experimental findings. The global strain prediction accuracy for orthotropic model has improved over isotropic model: the regression coefficient increased from 0.63 to 0.9-0.96.

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Section: Comparison Of Fe Models Vs Experimental Strain Findingsmentioning

confidence: 48%

Section: Model Generation and Determination Of Materials Propertiesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Influence of Isotropic and Orthotropic Relationships on the Accuracy of B-spline Based Heterogeneous Graded Finite Element Modeling of Proximal Femur

Pise¹,

Bhatt²,

Srivastava³

2012

Computer-Aided Design and Applications

Self Cite

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show abstract

“…Furthermore, the bone's surface was approximated by piecewise flat tessellation or piecewise parabolic tessellation, introducing un-smoothness of the surface and inaccuracies in the surface strains. Among the vast literature addressing h-FE simulations of the femur, the recent ones that present results which are closest to experimental observations are [8,9].…”

Section: Introductionmentioning

confidence: 94%

p-FEMs in biomechanics: Bones and arteries

Yosibash

2012

Computer Methods in Applied Mechanics and Engineering

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“…These relationships have a strong influence on the mechanical response of the whole femur and several works investigated which of the deterministic relations ''best represent the physical reality''-see Pise et al (2009), Taddei et al (2007), and Yosibash et al (2007a), for example, and references therein.…”

Section: Introductionmentioning

confidence: 99%

Prediction of the mechanical response of the femur with uncertain elastic properties

Wille

Rank

Yosibash

2012

Journal of Biomechanics

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A B-spline based heterogeneous modeling and analysis of proximal femur with graded element

Cited by 10 publications

References 29 publications

Influence of Isotropic and Orthotropic Relationships on the Accuracy of B-spline Based Heterogeneous Graded Finite Element Modeling of Proximal Femur

Influence of Isotropic and Orthotropic Relationships on the Accuracy of B-spline Based Heterogeneous Graded Finite Element Modeling of Proximal Femur

p-FEMs in biomechanics: Bones and arteries

Prediction of the mechanical response of the femur with uncertain elastic properties

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