Fast finite‐element analysis for damping of automotive structures having elastic bodies, viscoelastic bodies, porous media, and gas

2006 ◽  
Vol 120 (5) ◽  
pp. 3343-3343
Author(s):  
Takao Yamaguchi ◽  
Yoshio Kurosawa
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Porous Media ◽  
Element Analysis ◽  
Elastic Bodies ◽  
Automotive Structures ◽  
Viscoelastic Bodies

Finite element analysis of cracked elastic bodies under unsteady translation and rotation

1993 ◽  
Vol 101 (1-4) ◽  
pp. 111-137
Author(s):  
C. -Y. Gau ◽  
D. W. Nicholson
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Element Analysis ◽  
Elastic Bodies

Differences in hemodynamic characteristics under high packing density between the porous media model and finite element analysis in computational fluid dynamics of intracranial aneurysm virtual treatment

2019 ◽  
Vol 11 (8) ◽  
pp. 853-858 ◽  
Author(s):  
Yeqing Jiang ◽  
Liang Ge ◽  
Ruoyu Di ◽  
Gang Lu ◽  
Lei Huang ◽  
...  
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Porous Media ◽  
Packing Density ◽  
Parent Artery ◽  
Element Analysis ◽  
Lower Velocity ◽  
High Packing Density ◽  
Fea Model ◽  
Porous Media Model

ObjectiveThis study aimed to compare the hemodynamic differences among no sac (NOS), porous media (POM) and finite element analysis (FEA) models to investigate the recurrence-related risks for coiled intracranial aneurysms (IAs).MethodsThe study enrolled 10 patients with 11 IAs who received simple coiling treatment and hemodynamic simulations were performed for all IAs using the above three models. Velocity, wall shear stress (WSS) and residual flow volume (RFV) were calculated and compared in order to assess the model differences for both aneurysm sac and parent vessel regions.ResultsFor parent artery regions, all three models produced similar flow patterns and quantification analysis did not indicate differences in velocity and WSS (p>0.05). For aneurysm sac regions, the FEA model resulted in higher sac-maximized (0.18 m/s vs 0.06 m/s) and sac-averaged velocity (0.013 m/s vs 0.007 m/s), and higher sac-averaged (0.55 Pa vs 0.36 Pa, p=0.006) and sac-maximized WSS (12.1 Pa vs 6.6 Pa) than the POM model. The differences in RFV between the POM and FEA models under 11 different isovelocity thresholds (0.0001 m/s, 0.001 m/s, 0.002 m/s, 0.005 m/s, 0.01 m/s, 0.02 m/s, 0.05 m/s, 0.1 m/s, 0.2 m/s, 0.5 m/s, and 1 m/s) showed that the POM RFV was generally larger than those of the FEA model.ConclusionsCompared with the FEA model, the POM model provides a lower velocity and WSS and higher RFV for the aneurysm sac, which could lead to incorrect estimates of the recurrent risk of coiled IAs under high packing density.

Contact Between Elastic Bodies With an Elliptic Contact Interface in Torsion

1997 ◽  
Vol 64 (1) ◽  
pp. 144-148 ◽  
Author(s):  
J. F. Cuttino ◽  
T. A. Dow
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Three Dimensional ◽  
The Other ◽  
Contact Interface ◽  
Element Analysis ◽  
Elastic Bodies ◽  
Torque Generation ◽  
Elliptical Contact ◽  
Elliptic Contact

When two elastic three-dimensional bodies of specified radii come into contact, Hertzian forces at the interface result in the formation of an elliptical contact area. The rotation of one body relative to the other about an axis normal to the contact induces a nonlinear torque due to the progression of sliding in the contact interface. Using finite element analysis, a relationship describing torsional compliance with slip is presented for two elastic bodies with an elliptic contact interface under pure twist. The effect of changing material and geometric parameters is studied, and the relationships between torque generation and angle are defined with respect to these nondimensionalized parameters.

scholarly journals 2103 Finite element analysis for laser action in disordered porous media

2013 ◽  
Vol 2013.26 (0) ◽  
pp. _2103-1_-_2103-2_
Author(s):  
Garuda FUJII ◽  
Tsuyoshi UETA ◽  
Mamoru MIZUNO
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Porous Media ◽  
Laser Action ◽  
Element Analysis ◽  
Disordered Porous Media
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