47 citations · 231 across the 7 of their papers we have counts for
7 papers
Hierarchy of beam models for lattice core sandwich structures
Anssi T. Karttunen, J. N. Reddy
A discrete-to-continuum transformation to model 2-D discrete lattices as energetically equivalent 1-D continuum beams is developed. The study is initiated in a classical setting bu…
Nonlinear finite element analysis of lattice core sandwich plates
Praneeth Nampally, Anssi T. Karttunen, JN Reddy
A displacement-based, geometrically nonlinear finite element model is developed for lattice core sandwich panels modeled as 2-D equivalent single-layer (ESL), first-order shear def…
Two-scale micropolar plate model for web-core sandwich panels
Anssi T. Karttunen, JN Reddy, Jani Romanoff
A 2-D micropolar equivalent single-layer (ESL), first-order shear deformation (FSDT) plate model for 3-D web-core sandwich panels is developed. First, a 3-D web-core unit cell is m…
A nonlinear couple stress-based sandwich beam theory
Bruno Reinaldo Goncalves, Anssi T. Karttunen, Jani Romanoff
A geometrically nonlinear sandwich beam model founded on the modified couple stress Timoshenko beam theory with Kármán kinematics is derived and employed in the analysis of periodi…
Nonlinear finite element analysis of lattice core sandwich beams
Praneeth Nampally, Anssi T. Karttunen, JN Reddy
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…
Two-scale constitutive modeling of a lattice core sandwich beam
Anssi T. Karttunen, JN Reddy, Jani Romanoff
Constitutive equations are derived for a 1-D micropolar Timoshenko beam made of a web-core lattice material. First, a web-core unit cell is modeled by discrete classical constituen…
Micropolar modeling approach for periodic sandwich beams
Anssi T. Karttunen, JN Reddy, Jani Romanoff
We develop a micropolar Timoshenko beam theory and use it to model web-core sandwich beams. The beam theory is derived by a vector approach and the general displacement solution to…