%0 Journal Article
%A Fakouri Hasanabadi, M.
%A Malzbender, J.
%A Groß-Barsnick, S. M.
%A Abdoli, H.
%A Kokabi, A. H.
%A Faghihi-Sani, M. A.
%T Finite element optimization of sample geometry for measuring the torsional shear strength of glass/metal joints
%J Ceramics international / Ci news
%V 46
%N 4
%@ 0272-8842
%C Faenza
%I Ceramurgia73399
%M FZJ-2020-01934
%P 4857 - 4863
%D 2020
%X Assessment of mechanical properties of glass/metal joints is a challenging process, especially when the application relevant conditions of the joints have to be considered in the test design. In this study, a finite element method (FEM) is implemented to analyze a torsional shear strength test designed for glass-ceramic/steel joints aiming towards solid oxide fuel/electrolysis cells application. Deviations from axial symmetry of the square flanges (ends) of respective hourglass-shaped specimens and also supporting and loading sockets of the test set-up are included in the model to simulate conditions close to reality. Undesirable tensile stress and also shear stress concentration appear at the outer edge of glass-ceramic layers, which are less for the hollow-full specimen. The simulation results show that for a specimen with either 9 mm thick square- or 6 mm thick triangular-flanges, locally enhanced tensile stresses almost disappear, resulting in a symmetric shear stress distribution. The difference between the analytically derived nominal shear strength and the real critical shear stress derived via simulation reduces with decreasing the fracture torque.
%F PUB:(DE-HGF)16
%9 Journal Article
%U <Go to ISI:>//WOS:000512219600098
%R 10.1016/j.ceramint.2019.10.221
%U https://juser.fz-juelich.de/record/875303