scholarly journals Modeling masticatory muscle force in finite element analysis: Sensitivity analysis using principal coordinates analysis

2005 ◽  
Vol 283A (2) ◽  
pp. 288-299 ◽  
Author(s):  
Callum F. Ross ◽  
Biren A. Patel ◽  
Dennis E. Slice ◽  
David S. Strait ◽  
Paul C. Dechow ◽  
...  
Keyword(s):  
Finite Element Analysis ◽  
Sensitivity Analysis ◽  
Finite Element ◽  
Muscle Force ◽  
Masticatory Muscle ◽  
Principal Coordinates Analysis ◽  
Element Analysis ◽  
Principal Coordinates

The Application of ABAQUS in Finite Element Analysis of CFRD

2012 ◽  
Vol 466-467 ◽  
pp. 165-169
Author(s):  
Xiang Li Huo ◽  
Bo Wang ◽  
Zong Kun Li
Keyword(s):  
Finite Element Analysis ◽  
Sensitivity Analysis ◽  
Finite Element ◽  
Dam Construction ◽  
Element Analysis ◽  
Univariate Sensitivity Analysis ◽  
Rockfill Dam ◽  
Reservoir Impoundment ◽  
Concrete Face ◽  
Concrete Face Rockfill Dam

The deformations and stresses of a concrete face rockfill dam (CFRD) for dam construction and reservoir impoundment were simulated by the element add/remove technique of ABAQUS. And, the sensitivity analysis of main parameters of the Duncan-Chang E-B model was carried out by the method of univariate sensitivity analysis and the critical sensitivity parameters of the deformation and stress on the CFRD were obtained. This research has some guidance and reference for future similar projects design and monitoring.

scholarly journals A Posteriori Detection of Numerical Locking in hpq-Adaptive Finite Element Analysis

2020 ◽  
Vol 10 (22) ◽  
pp. 8247
Author(s):  
Łukasz Miazio ◽  
Grzegorz Zboiński
Keyword(s):  
Finite Element Analysis ◽  
Sensitivity Analysis ◽  
Finite Element ◽  
Solid Mechanics ◽  
Problem Solution ◽  
Adaptive Finite Element ◽  
A Posteriori ◽  
Element Analysis ◽  
Numerical Locking ◽  
Locking Phenomena

The proposed detection algorithms are assigned for the hpq-adaptive finite element analysis of the solid mechanics problems affected by the locking phenomena. The algorithms are combined with the M- and hpq-adaptive finite element method, where M is the element model, h denotes the element size parameter, and p and q stand for the longitudinal and transverse approximation orders within an element. The applied adaptive scheme is extended with the additional step where the locking phenomena are a posteriori detected, assessed and resolved. The detection can be applied to shear, membrane, or shear–membrane locking phenomena. The removal of the undesired influence of the numerical locking on the problem solution is based on p-enrichment of the mesh. The detection algorithm is also enriched with the locking assessment algorithm which is capable of determination of the optimized value of p which is sufficient for the phenomena removal. The detection and assessment algorithms are based on a simple sensitivity analysis performed locally for the finite elements of the thin-walled domain. The sensitivity analysis lies in comparison of the element solutions corresponding to two values of the order p, namely current and potentially eliminating the locking. The local solutions are obtained from the element residual method. The elaborated algorithms are original, relatively simple, extremely reliable, and highly effective.

scholarly journals Effect of intercostal muscle contraction on rib motion in humans studied by finite element analysis

2018 ◽  
Vol 125 (4) ◽  
pp. 1165-1170 ◽  
Author(s):  
Guangzhi Zhang ◽  
Xian Chen ◽  
Junji Ohgi ◽  
Fei Jiang ◽  
Seiryo Sugiura ◽  
...  
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Muscle Contraction ◽  
Muscle Force ◽  
Special Structure ◽  
Tissue Deformation ◽  
Intercostal Muscle ◽  
Element Analysis ◽  
Rib Cage ◽  
Intercostal Muscles

The effect of intercostal muscle contraction on generating rib motion has been investigated for a long time and is still controversial in physiology. This may be because of the complicated structure of the rib cage, making direct prediction of the relationship between intercostal muscle force and rib movement impossible. Finite element analysis is a useful tool that is good at solving complex structural mechanic problems. In this study, we individually activated the intercostal muscle groups from the dorsal to ventral portions and obtained five different rib motions classified based on rib moving directions. We found that the ribs cannot only rigidly rotate around the spinal joint but also be deformed, particularly around the relatively soft costal cartilages, where the moment of muscle force for the rigid rotation is small. Although the intercostal muscles near the costal cartilages cannot generate a large moment to rotate the ribs, the muscles may still have a potential to deform the costal cartilages and contribute to the expansion and contraction of the rib cage based on the force-length relationship. Our results also indicated that this potential is matched well with the special shape of the costal cartilages, which become progressively oblique in the caudal direction. Compared with the traditional explanation of rib motion, by additionally considering the effect from the tissue deformation, we found that the special structure of the ventral portion of the human rib cage could be of mechanical benefit to the intercostal muscles, generating inspiratory and expiratory rib motions. NEW & NOTEWORTHY Compared with the traditional explanation of rib motion, additionally considering the effect from tissue deformation helps us understand the special structure of the ventral portion of the human rib cage, such that the costal cartilages progressively become oblique and the costochondral junction angles gradually change into nearly right angles from the upper to lower ribs, which could be of mechanical benefit to the intercostal muscles in the ventral portion, generating inspiratory and expiratory rib motions.

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