Nonlinear finite element analysis of lattice core sandwich beams

Tutkimustuotos: Lehtiartikkelivertaisarvioitu

Tutkijat

Organisaatiot

  • Texas A and M University

Kuvaus

A geometrically nonlinear finite element model is developed for the bending analysis of micropolar Timoshenko beams using the principle of virtual displacements and linear Lagrange interpolation functions. The nonlinearity enters the model via a nonlinear von Kármán strain term that allows the micropolar beam to undergo moderate rotations. The nonlinear micropolar Timoshenko beam is used as an equivalent single layer model to study four different lattice core sandwich beams. A two-scale energy method is used to derive the micropolar constitutive equations for web, hexagonal, Y-frame and corrugated core topologies. Various bending cases are studied numerically using the developed 1-D finite element model. Reduced integration techniques are used to overcome the shear and membrane locking. The present 1-D results are in good agreement with the corresponding 2-D finite element beam frame results for global bending.

Yksityiskohdat

AlkuperäiskieliEnglanti
Sivut431-439
Sivumäärä9
JulkaisuEuropean Journal of Mechanics, A/Solids
Vuosikerta74
Varhainen verkossa julkaisun päivämäärä27 joulukuuta 2018
TilaJulkaistu - 1 maaliskuuta 2019
OKM-julkaisutyyppiA1 Julkaistu artikkeli, soviteltu

ID: 31363704