Initial postcritical behavior of sandwich columns with low shear and transverse stiffness

Alessandro Beghini; Zdeněk P. Bažant; Anthony M. Waas; Shiladitya Basu

doi:10.1016/j.compositesb.2007.02.018

Initial postcritical behavior of sandwich columns with low shear and transverse stiffness

Alessandro Beghini, Zdeněk P. Bažant^*, Anthony M. Waas, Shiladitya Basu

^*Corresponding author for this work

Civil and Environmental Engineering

Research output: Contribution to journal › Article › peer-review

5 Scopus citations

Abstract

The energetic variational analysis of the initial postcritical behavior of homogenized orthotropic columns presented in a previous paper is here revisited in the specific context of sandwich structures. For this purpose, consideration of the transverse deformation in the core is found to be essential. It is shown that imperfection sensitivity can arise for a certain range of stiffness and geometric parameters. The bifurcation is symmetric and Koiter's 2/3-power law is followed. Finite element simulations of short columns validate analytical predictions of maximum load reduction due to imperfection sensitivity.

Original language	English (US)
Pages (from-to)	159-164
Number of pages	6
Journal	Composites Part B: Engineering
Volume	39
Issue number	1
DOIs	https://doi.org/10.1016/j.compositesb.2007.02.018
State	Published - Jan 2008

Funding

Financial support under Grant N00014-02-I-0622 from the Office of Naval Research to Northwestern University (monitored by Dr. Yapa D.S. Rajapakse) is gratefully acknowledged.

Keywords

A. Polymer-matrix composites (PMCs)
B. Buckling
B. Delamination
B. Fracture
Sandwich structures

ASJC Scopus subject areas

Ceramics and Composites
Mechanics of Materials
Mechanical Engineering
Industrial and Manufacturing Engineering

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10.1016/j.compositesb.2007.02.018

Cite this

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title = "Initial postcritical behavior of sandwich columns with low shear and transverse stiffness",

abstract = "The energetic variational analysis of the initial postcritical behavior of homogenized orthotropic columns presented in a previous paper is here revisited in the specific context of sandwich structures. For this purpose, consideration of the transverse deformation in the core is found to be essential. It is shown that imperfection sensitivity can arise for a certain range of stiffness and geometric parameters. The bifurcation is symmetric and Koiter's 2/3-power law is followed. Finite element simulations of short columns validate analytical predictions of maximum load reduction due to imperfection sensitivity.",

keywords = "A. Polymer-matrix composites (PMCs), B. Buckling, B. Delamination, B. Fracture, Sandwich structures",

author = "Alessandro Beghini and Ba{\v z}ant, \{Zden{\v e}k P.\} and Waas, \{Anthony M.\} and Shiladitya Basu",

note = "Funding Information: Financial support under Grant N00014-02-I-0622 from the Office of Naval Research to Northwestern University (monitored by Dr. Yapa D.S. Rajapakse) is gratefully acknowledged. Copyright: Copyright 2008 Elsevier B.V., All rights reserved.",

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AU - Beghini, Alessandro

AU - Bažant, Zdeněk P.

AU - Waas, Anthony M.

AU - Basu, Shiladitya

N1 - Funding Information: Financial support under Grant N00014-02-I-0622 from the Office of Naval Research to Northwestern University (monitored by Dr. Yapa D.S. Rajapakse) is gratefully acknowledged. Copyright: Copyright 2008 Elsevier B.V., All rights reserved.

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N2 - The energetic variational analysis of the initial postcritical behavior of homogenized orthotropic columns presented in a previous paper is here revisited in the specific context of sandwich structures. For this purpose, consideration of the transverse deformation in the core is found to be essential. It is shown that imperfection sensitivity can arise for a certain range of stiffness and geometric parameters. The bifurcation is symmetric and Koiter's 2/3-power law is followed. Finite element simulations of short columns validate analytical predictions of maximum load reduction due to imperfection sensitivity.

AB - The energetic variational analysis of the initial postcritical behavior of homogenized orthotropic columns presented in a previous paper is here revisited in the specific context of sandwich structures. For this purpose, consideration of the transverse deformation in the core is found to be essential. It is shown that imperfection sensitivity can arise for a certain range of stiffness and geometric parameters. The bifurcation is symmetric and Koiter's 2/3-power law is followed. Finite element simulations of short columns validate analytical predictions of maximum load reduction due to imperfection sensitivity.

KW - A. Polymer-matrix composites (PMCs)

KW - B. Buckling

KW - B. Delamination

KW - B. Fracture

KW - Sandwich structures

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Initial postcritical behavior of sandwich columns with low shear and transverse stiffness

Abstract

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Keywords

ASJC Scopus subject areas

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