000202382 001__ 202382
000202382 005__ 20181203023631.0
000202382 0247_ $$2doi$$a10.1016/j.compstruct.2014.05.050
000202382 022__ $$a0263-8223
000202382 02470 $$2ISI$$a000340300800045
000202382 037__ $$aARTICLE
000202382 245__ $$aAnalytical modeling of local stresses at Balsa/timber core joints of FRP sandwich structures
000202382 260__ $$aOxford$$bElsevier$$c2014
000202382 269__ $$a2014
000202382 300__ $$a8
000202382 336__ $$aJournal Articles
000202382 520__ $$aIn 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 and local bending of the face sheets at these locations, both of which may cause significant stress concentrations. Two analytical models have been developed to estimate local stress concentrations at butt and scarf joints of dissimilar sandwich cores. The first model predicts local axial stresses in the face sheets at scarf joints while the second model predicts local shear stresses in cores at both butt and scarf joints. The models are based on an existing closed form model and have been validated by FEM for Balsa-Douglas fir butt and scarf joints, both implemented in a sandwich with glass fiber-reinforced polymer (GFRP) face sheets. The models are applicable for scarf joints with angles of termination between 20 degrees and 60 degrees. They also demonstrate the positive effect of scarf joints compared to butt joints. The axial stress concentrations in the face sheets and shear stress concentrations in the cores almost disappear if a butt joint is changed to a scarf joint configuration. (C) 2014 Elsevier Ltd. All rights reserved.
000202382 6531_ $$aSandwich slab
000202382 6531_ $$aCore joint
000202382 6531_ $$aScarf joint
000202382 6531_ $$aBalsa/timber core
000202382 6531_ $$aAnalytical modeling
000202382 700__ $$0242003$$aOsei-Antwi, Michael$$g198484
000202382 700__ $$0240164$$aDe Castro, Julia$$g101009
000202382 700__ $$0241999$$aVassilopoulos, Anastasios P.$$g172705
000202382 700__ $$0240002$$aKeller, Thomas$$g121845
000202382 773__ $$j116$$q501-508$$tComposite Structures
000202382 909C0 $$0252002$$pCCLAB$$xU10234
000202382 909CO $$ooai:infoscience.tind.io:202382$$particle$$pENAC
000202382 917Z8 $$x121845
000202382 937__ $$aEPFL-ARTICLE-202382
000202382 973__ $$aEPFL$$rREVIEWED$$sPUBLISHED
000202382 980__ $$aARTICLE