Micropolar modeling approach for periodic sandwich beams

Research output: Contribution to journalArticle

Standard

Micropolar modeling approach for periodic sandwich beams. / Karttunen, Anssi T.; Reddy, J. N.; Romanoff, Jani.

In: Composite Structures, Vol. 185, 01.02.2018, p. 656-664.

Research output: Contribution to journalArticle

Harvard

APA

Vancouver

Author

Bibtex - Download

@article{3daf3d9725b24dcc81b1f28abc9f6e9c,
title = "Micropolar modeling approach for periodic sandwich beams",
abstract = "A micropolar Timoshenko beam formulation is developed and used to model web-core sandwich beams. The beam theory is derived by a vector approach and the general solution to the governing sixth-order equations is given. A nodally-exact micropolar Timoshenko beam finite element is derived using the solution. Bending and shear stiffness coefficients for a web-core sandwich beam are determined through unit cell analysis, where the split of the shear forces into symmetric and antisymmetric parts plays a pivotal role. Static bending of web-core beams is studied using the micropolar model as well as modified couple-stress and classical Timoshenko beam models. The micropolar 1-D results are in best agreement with 2-D web-core beam frame results. This is because the micropolar beam allows antisymmetric shear deformation to emerge at locations where the 2-D web-core deformations cannot be reduced to 1-D by considering only symmetric shear behavior.",
keywords = "Finite element, General solution, Micropolar, Sandwich structures, Timoshenko beam",
author = "Karttunen, {Anssi T.} and Reddy, {J. N.} and Jani Romanoff",
year = "2018",
month = "2",
day = "1",
doi = "10.1016/j.compstruct.2017.11.064",
language = "English",
volume = "185",
pages = "656--664",
journal = "Composite Structures",
issn = "0263-8223",

}

RIS - Download

TY - JOUR

T1 - Micropolar modeling approach for periodic sandwich beams

AU - Karttunen, Anssi T.

AU - Reddy, J. N.

AU - Romanoff, Jani

PY - 2018/2/1

Y1 - 2018/2/1

N2 - A micropolar Timoshenko beam formulation is developed and used to model web-core sandwich beams. The beam theory is derived by a vector approach and the general solution to the governing sixth-order equations is given. A nodally-exact micropolar Timoshenko beam finite element is derived using the solution. Bending and shear stiffness coefficients for a web-core sandwich beam are determined through unit cell analysis, where the split of the shear forces into symmetric and antisymmetric parts plays a pivotal role. Static bending of web-core beams is studied using the micropolar model as well as modified couple-stress and classical Timoshenko beam models. The micropolar 1-D results are in best agreement with 2-D web-core beam frame results. This is because the micropolar beam allows antisymmetric shear deformation to emerge at locations where the 2-D web-core deformations cannot be reduced to 1-D by considering only symmetric shear behavior.

AB - A micropolar Timoshenko beam formulation is developed and used to model web-core sandwich beams. The beam theory is derived by a vector approach and the general solution to the governing sixth-order equations is given. A nodally-exact micropolar Timoshenko beam finite element is derived using the solution. Bending and shear stiffness coefficients for a web-core sandwich beam are determined through unit cell analysis, where the split of the shear forces into symmetric and antisymmetric parts plays a pivotal role. Static bending of web-core beams is studied using the micropolar model as well as modified couple-stress and classical Timoshenko beam models. The micropolar 1-D results are in best agreement with 2-D web-core beam frame results. This is because the micropolar beam allows antisymmetric shear deformation to emerge at locations where the 2-D web-core deformations cannot be reduced to 1-D by considering only symmetric shear behavior.

KW - Finite element

KW - General solution

KW - Micropolar

KW - Sandwich structures

KW - Timoshenko beam

UR - http://www.scopus.com/inward/record.url?scp=85036450525&partnerID=8YFLogxK

U2 - 10.1016/j.compstruct.2017.11.064

DO - 10.1016/j.compstruct.2017.11.064

M3 - Article

VL - 185

SP - 656

EP - 664

JO - Composite Structures

JF - Composite Structures

SN - 0263-8223

ER -

ID: 16811610