scholarly journals Assessment of material uncertainties in solid foams based on local homogenization procedures

2012 ◽  
Vol 49 (19-20) ◽  
pp. 2807-2822 ◽  
Author(s):  
Carla Beckmann ◽  
Jörg Hohe
Keyword(s):  
Material Uncertainties ◽  
Solid Foams

Local probabilistic homogenization schemes for assessment of material uncertainties in solid foams

PAMM ◽  
2014 ◽  
Vol 14 (1) ◽  
pp. 551-552
Author(s):  
Jörg Hohe ◽  
Hanna Paul ◽  
Carla Beckmann
Keyword(s):  
Material Uncertainties ◽  
Solid Foams

Starch-based extruded cereals enriched in fibers: A behavior of composite solid foams

2013 ◽  
Vol 98 (1) ◽  
pp. 842-853 ◽  
Author(s):  
Hélène Chanvrier ◽  
Fabrice Desbois ◽  
Fabienne Perotti ◽  
Claire Salzmann ◽  
Sophie Chassagne ◽  
...  
Keyword(s):  
Solid Foams ◽  
Composite Solid

Competition and Coexistence of Raman and Random Lasing in Silica-/Titania-Based Solid Foams

2015 ◽  
Vol 3 (11) ◽  
pp. 1640-1651 ◽  
Author(s):  
Preeti Gaikwad ◽  
Nicolas Bachelard ◽  
Patrick Sebbah ◽  
Rénal Backov ◽  
Renaud A. L. Vallée
Keyword(s):  
Random Lasing ◽  
Solid Foams

Stochastic Dynamic Analysis of Structures with Spatially Uncertain Material Parameters

2014 ◽  
Vol 14 (08) ◽  
pp. 1440029 ◽  
Author(s):  
Kheirollah Sepahvand ◽  
Steffen Marburg
Keyword(s):  
Finite Element ◽  
Modal Analysis ◽  
Polynomial Chaos ◽  
Element Model ◽  
Stochastic Dynamic ◽  
Stochastic Field ◽  
Structural Dynamic ◽  
Material Parameters ◽  
Material Uncertainties ◽  
Stochastic Dynamic Analysis

This paper investigates the uncertainty quantification in structural dynamic problems with spatially random variation in material and damping parameters. Uncertain and locally varying material parameters are represented as stochastic field by means of the Karhunen–Loève (KL) expansion. The stiffness and damping properties of the structure are considered uncertain. Stochastic finite element of structural modal analysis is performed in which modal responses are represented using the generalized polynomial chaos (gPC) expansion. Knowing the KL expansions of the random parameters, the nonintrusive technique is employed on a set of random collocation points where the structure deterministic finite element model is executed to estimate the unknown coefficients of the polynomial chaos expansions. A numerical case study is presented for a cantilever beam with random Young's modulus involving spatial variation. The proportional damping constants are estimated from the experimental modal analysis. The expected value, standard deviation, and probability distribution of the random eigenfrequencies and the damping ratios are evaluated. The results show high accuracy compared to the Monte-Carlo (MC) simulations with 3000 realizations. It is also demonstrated that the eigenfrequencies and the damping ratios are equally affected from material uncertainties.

scholarly journals Structural characterization of solid foams

2014 ◽  
Vol 15 (8-9) ◽  
pp. 674-682 ◽  
Author(s):  
Éric Maire ◽  
Jérôme Adrien ◽  
Clémence Petit
Keyword(s):  
Structural Characterization ◽  
Solid Foams
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