Person
Michael Osei-Antwi
This person is no longer with EPFL
Related publications (11)
Structural performance of complex core systems for FRP-balsa composite sandwich bridge decks
Based on current fiber-reinforced polymer (FRP) composite construction principles, FRP decks fall into two categories: pultruded decks and sandwich decks. Sandwich decks comprise face sheets and either honeycombs or foams reinforced with internal FRP webs ...
EPFL2014Analytical modeling of local stresses at Balsa/timber core joints of FRP sandwich structures
Thomas Keller, Anastasios Vassilopoulos, Julia De Castro San Roman Fest, Michael Osei-Antwi
In order to optimize sandwich structures, core materials of different density and thus different stiffness and strength are often combined. The material discontinuities at joints of dissimilar core materials may lead to abrupt changes of the shear angles a ...
Elsevier2014GFRP-Balsa Sandwich Bridge Deck: Concept, Design, and Experimental Validation
Thomas Keller, Julia De Castro San Roman Fest, Michael Osei-Antwi
The concept, design, and experimental validation of the new Avancon Bridge in Bex, Switzerland, are described. The lightweight glass fiber-reinforced polymer (GFRP) sandwich bridge deck adhesively bonded to steel girders, reduced the traffic disruption per ...
American Society of Civil Engineers2014Structural limits of FRP-balsa sandwich decks in bridge construction
Thomas Keller, Anastasios Vassilopoulos, Julia De Castro San Roman Fest, Michael Osei-Antwi
The span limits of two glass fiber-reinforced polymer (GFRP) bridge concepts involving GFRP-balsa sandwich plates are discussed. The sandwich plates were either used directly as slab bridges or as decks of a hybrid sandwich-steel girder bridges. In the lat ...
Elsevier2014Modeling of axial and shear stresses in multilayer Sandwich beams with stiff core layers
Thomas Keller, Anastasios Vassilopoulos, Julia De Castro San Roman Fest, Michael Osei-Antwi
In order to optimize the load-bearing behavior of sandwich structures and adapt it to specific requirements, their core may be composed of layers of different materials with tailored properties. These layers may consist not only of soft foam or honeycomb m ...
Elsevier2014FRP-balsa composite sandwich bridge deck with complex core configuration
Thomas Keller, Anastasios Vassilopoulos, Julia De Castro San Roman Fest, Michael Osei-Antwi
The aim of this work was to investigate to what extent the performance of a glass fiberreinforced polymer (GFRP) sandwich slab-bridge with uniform high-density balsa core could be improved in terms of structural efficiency and weight thanks to a more compl ...
2014GFRP-balsa sandwich bridge deck: Concept, design and experimental validation
Thomas Keller, Julia De Castro San Roman Fest, Michael Osei-Antwi
The concept, design and experimental validation of the new Avançon Bridge in Bex, Switzerland, are described. The lightweight glass fiber-reinforced polymer (GFRP) sandwich bridge deck adhesively bonded to steel girders reduced the traffic disruption perio ...
2014Fracture in complex balsa cores of fiber-reinforced polymer sandwich structures
Thomas Keller, Anastasios Vassilopoulos, Julia De Castro San Roman Fest, Michael Osei-Antwi
Fracture in the complex balsa cores of fiber-reinforced polymer (FRP) sandwich beams was analyzed. The cores were composed of high- and low-density balsa layers separated by a circular adhesive interface or FRP arch. The balsa layers were cut from panels w ...
Elsevier2014Structural limits of FRP-balsa sandwich decks in bridge construction
Thomas Keller, Julia De Castro San Roman Fest, Michael Osei-Antwi
The span limits of two glass fiber-reinforced polymer (GFRP) bridge concepts involving GFRP-balsa sandwich plates are discussed. The sandwich plates were either used directly as slab bridges or as decks of a hybrid sandwich-steel girder bridges. In the lat ...
International Association for Bridge and Structural Engineering2014Shear mechanical characterization of balsa wood as core material of composite sandwich panels
Thomas Keller, Anastasios Vassilopoulos, Julia De Castro San Roman Fest, Michael Osei-Antwi
An experimental study was performed using Iosipescu specimens to evaluate the effects of parameters such as shear plane, density and adhesive joints on the shear stiffness and strength of balsa wood panels as well as the variation of ductility with respect ...
Elsevier2013