scholarly journals An alternative finite strain elastoplastic model applied to soft core sandwich panels simulation

2021 ◽  
Vol 18 (6) ◽  
Author(s):  
Humberto Breves Coda
Keyword(s):  
Finite Strain ◽  
Sandwich Panels ◽  
Soft Core ◽  
Elastoplastic Model

scholarly journals Numerical modelling of sandwich panels with a non-continuous soft core

2018 ◽  
Vol 157 ◽  
pp. 06007
Author(s):  
Jolanta Pozorska
Keyword(s):  
Numerical Modelling ◽  
Static Analysis ◽  
Sandwich Panel ◽  
Sandwich Panels ◽  
Soft Core ◽  
Structural Behavior ◽  
Progressive Damage ◽  
Local Instability ◽  
Unilateral Constraints ◽  
The Core

The paper presents the problem of static analysis of sandwich structures with a non-continuous soft core. In the numerical 3D FE models, the core is divided into separated parts. The contact between these parts has the form of unilateral constraints. The model also allows for local debonding of the facing and local imperfections of sandwich panel geometry. Particular attention is paid to the problem of local instability of the facing that is compressed during bending. The phenomenon of progressive damage and the influence of non-continuity of the core on the structural behavior of the sandwich panel is also discussed.

Similitude of sandwich panels with a ‘soft’ core in buckling

2004 ◽  
Vol 35 (6-8) ◽  
pp. 599-608 ◽  
Author(s):  
Y. Frostig ◽  
G.J. Simitses
Keyword(s):  
Sandwich Panels ◽  
Soft Core

Elastic-Plastic Wrinkling of Sandwich Panels With Layered Cores

2005 ◽  
Vol 72 (2) ◽  
pp. 276-281 ◽  
Author(s):  
Joachim L. Grenestedt ◽  
Mikael Danielsson
Keyword(s):  
Plane Strain ◽  
Plane Stress ◽  
Sandwich Panels ◽  
Soft Core ◽  
Foam Core ◽  
Determinantal Equation ◽  
Elastic Plastic ◽  
Weight Penalty ◽  
Bifurcation Problems ◽  
A Minor

Elastic-plastic wrinkling of compression loaded sandwich panels made with layered cores was studied analytically and experimentally. A core with a stiff layer near the sandwich skins can improve various properties, including wrinkling and impact strengths, with only a minor weight penalty. The 2D plane stress and plane strain bifurcation problems were solved analytically, save for a determinantal equation which was solved numerically. Experiments were performed on aluminum skin/foam core sandwich panels with different combinations of stiff and soft core materials. Good correlation between experiments and theory was obtained.

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