Microstructure representation and material characterization for multiscale finite element simulations of local mechanical behavior in damaged metallic structures

2008 ◽  
Author(s):  
M. Parra Garcia ◽  
C. Luo ◽  
A. Noshadravan ◽  
A. Keck ◽  
R. Teale ◽  
...  
Keyword(s):  
Finite Element ◽  
Mechanical Behavior ◽  
Material Characterization ◽  
Finite Element Simulations ◽  
Metallic Structures ◽  
Multiscale Finite Element

Multiscale Finite Element Modeling of the Viscoelastic Behavior of Sportswear Under Periodic Load

2020 ◽  
pp. 0887302X2093779
Author(s):  
Ali Sajjadi ◽  
Seyed Abdolkarim Hosseini ◽  
Saeed Ajeli ◽  
Mohammad Mashayekhi
Keyword(s):  
Finite Element ◽  
Mechanical Behavior ◽  
Viscoelastic Properties ◽  
Viscoelastic Behavior ◽  
Tensile Load ◽  
Periodic Load ◽  
Unit Cells ◽  
Multiscale Finite Element ◽  
Optimum Sample ◽  
Good Agreement

The aim of this study was to investigate the influence of different stitch factors on the mechanical behavior of the seam section of sportswear under periodic load. Multiscale finite element (FE) modeling was then utilized to predict the mechanical behavior of the samples under periodic tensile load. The unit cells of the fabric and the stitched section were modeled in the mesoscale. Elastic and viscoelastic properties of the yarns were assigned to the model. In order to obtain the mechanical properties of the sample, periodic boundary conditions were applied to the unit cell. Elastic and viscoelastic properties calculated from the mesoscale were then used for the macromodel. FE results had a good agreement with the experimental ones in predicting the mechanical behavior of the seam section under the periodic tensile load. By using Taguchi method, the optimum sample was found.

Finite Element Stent Design: Parametric Modeling of Braided Wirestents Using PyFormex

2007 ◽  
Author(s):  
Matthieu De Beule ◽  
Benedict Verhegghe ◽  
Peter Mortier ◽  
Kim Van Loo ◽  
Rudy Van Impe ◽  
...  
Keyword(s):  
Finite Element ◽  
Mechanical Behavior ◽  
Stent Graft ◽  
Computer Model ◽  
Geometrical Model ◽  
Parametric Modeling ◽  
Finite Element Simulations ◽  
Stent Design ◽  
Wide Range

Selfexpandable stent(graft)s are supporting tubular mesh devices used for the treatment of occlusive diseases and for the ‘exclusion’ of aneurysms. Wirestents are a class of flexible stents braided from a set of ultra fine wires and currently manufactured in a wide range of materials (e.g. phynox, nitinol, polymers) and compositions (single or multilayer). For design purposes as well as for studying the mechanical behavior of such a device by finite element simulations, a geometrical model using 1D elements will usually be appropriate. However, the computer model will contain a very large number of such elements, and building the geometrical model using classical CAD methodologies may become laborious. Consequently, literature dedicated to the mechanical behavior of braided wirestents is (very) scarce and the stent(graft)s are simplified as virtual single sheets [1].

Sign in / Sign up

Export Citation Format

Share Document