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Fatigue strength of laser-welded foam-filled steel sandwich beams

Tutkimustuotosvertaisarvioitu

Standard

Fatigue strength of laser-welded foam-filled steel sandwich beams. / Karttunen, Anssi T.; Kanerva, Mikko; Frank, Darko; Romanoff, Jani; Remes, Heikki; Jelovica, Jasmin; Bossuyt, Sven; Sarlin, Essi.

julkaisussa: Materials and Design, Vuosikerta 115, 02.2017, s. 64-72.

Tutkimustuotosvertaisarvioitu

Harvard

Karttunen, AT, Kanerva, M, Frank, D, Romanoff, J, Remes, H, Jelovica, J, Bossuyt, S & Sarlin, E 2017, 'Fatigue strength of laser-welded foam-filled steel sandwich beams', Materials and Design, Vuosikerta. 115, Sivut 64-72. https://doi.org/10.1016/j.matdes.2016.11.039

APA

Karttunen, A. T., Kanerva, M., Frank, D., Romanoff, J., Remes, H., Jelovica, J., ... Sarlin, E. (2017). Fatigue strength of laser-welded foam-filled steel sandwich beams. Materials and Design, 115, 64-72. https://doi.org/10.1016/j.matdes.2016.11.039

Vancouver

Karttunen AT, Kanerva M, Frank D, Romanoff J, Remes H, Jelovica J et al. Fatigue strength of laser-welded foam-filled steel sandwich beams. Materials and Design. 2017 helmi;115:64-72. https://doi.org/10.1016/j.matdes.2016.11.039

Author

Karttunen, Anssi T. ; Kanerva, Mikko ; Frank, Darko ; Romanoff, Jani ; Remes, Heikki ; Jelovica, Jasmin ; Bossuyt, Sven ; Sarlin, Essi. / Fatigue strength of laser-welded foam-filled steel sandwich beams. Julkaisussa: Materials and Design. 2017 ; Vuosikerta 115. Sivut 64-72.

Bibtex - Lataa

@article{6da30363712e44e0b85cd0c0c4d69bef,
title = "Fatigue strength of laser-welded foam-filled steel sandwich beams",
abstract = "Abstract Laser stake-welded steel sandwich panels are widely used in engineering due to their high stiffness-to-weight ratios. The welds are thinner than the plates they join so that there are two crack-like notches on each side of a weld. As a consequence, the welded joints are susceptible to fatigue. In this study, as a remedy to the fatigue problem, low-density H80-grade Divinycell polyvinylchloride foam is bonded adhesively to the voids of stake-welded web-core sandwich beams. The foam reduces shear-induced stresses in the stake-welds. The choice of Divinycell H80 is founded on earlier J-integral-based finite element fatigue assessments of sandwich panels. Empty and the H80-filled sandwich beams are tested in three-point-bending for stiffness, ultimate strength and fatigue (load ratio R = 0.05). The failure modes in the weld joint region are studied using scanning electron microscopy. The experimental results show that the filling increases the stiffness of the sandwich beams by a factor of three while the weight is increased only by 6{\%}. The ultimate strength is increased by 2.7 times. As for the fatigue behavior, the slope increases from m = 4.508 of empty panels to m = 7.321 of filled panels while the load level at 2 million cycles increases by a factor of 8.5.",
keywords = "Sandwich panels, Ultimate strength, fatigue strength, Hybrid structure, Scanning electron microscopy",
author = "Karttunen, {Anssi T.} and Mikko Kanerva and Darko Frank and Jani Romanoff and Heikki Remes and Jasmin Jelovica and Sven Bossuyt and Essi Sarlin",
year = "2017",
month = "2",
doi = "10.1016/j.matdes.2016.11.039",
language = "English",
volume = "115",
pages = "64--72",
journal = "Materials and Design",
issn = "0264-1275",
publisher = "Elsevier",

}

RIS (suitable for import to EndNote) - Lataa

TY - JOUR

T1 - Fatigue strength of laser-welded foam-filled steel sandwich beams

AU - Karttunen, Anssi T.

AU - Kanerva, Mikko

AU - Frank, Darko

AU - Romanoff, Jani

AU - Remes, Heikki

AU - Jelovica, Jasmin

AU - Bossuyt, Sven

AU - Sarlin, Essi

PY - 2017/2

Y1 - 2017/2

N2 - Abstract Laser stake-welded steel sandwich panels are widely used in engineering due to their high stiffness-to-weight ratios. The welds are thinner than the plates they join so that there are two crack-like notches on each side of a weld. As a consequence, the welded joints are susceptible to fatigue. In this study, as a remedy to the fatigue problem, low-density H80-grade Divinycell polyvinylchloride foam is bonded adhesively to the voids of stake-welded web-core sandwich beams. The foam reduces shear-induced stresses in the stake-welds. The choice of Divinycell H80 is founded on earlier J-integral-based finite element fatigue assessments of sandwich panels. Empty and the H80-filled sandwich beams are tested in three-point-bending for stiffness, ultimate strength and fatigue (load ratio R = 0.05). The failure modes in the weld joint region are studied using scanning electron microscopy. The experimental results show that the filling increases the stiffness of the sandwich beams by a factor of three while the weight is increased only by 6%. The ultimate strength is increased by 2.7 times. As for the fatigue behavior, the slope increases from m = 4.508 of empty panels to m = 7.321 of filled panels while the load level at 2 million cycles increases by a factor of 8.5.

AB - Abstract Laser stake-welded steel sandwich panels are widely used in engineering due to their high stiffness-to-weight ratios. The welds are thinner than the plates they join so that there are two crack-like notches on each side of a weld. As a consequence, the welded joints are susceptible to fatigue. In this study, as a remedy to the fatigue problem, low-density H80-grade Divinycell polyvinylchloride foam is bonded adhesively to the voids of stake-welded web-core sandwich beams. The foam reduces shear-induced stresses in the stake-welds. The choice of Divinycell H80 is founded on earlier J-integral-based finite element fatigue assessments of sandwich panels. Empty and the H80-filled sandwich beams are tested in three-point-bending for stiffness, ultimate strength and fatigue (load ratio R = 0.05). The failure modes in the weld joint region are studied using scanning electron microscopy. The experimental results show that the filling increases the stiffness of the sandwich beams by a factor of three while the weight is increased only by 6%. The ultimate strength is increased by 2.7 times. As for the fatigue behavior, the slope increases from m = 4.508 of empty panels to m = 7.321 of filled panels while the load level at 2 million cycles increases by a factor of 8.5.

KW - Sandwich panels

KW - Ultimate strength, fatigue strength

KW - Hybrid structure

KW - Scanning electron microscopy

U2 - 10.1016/j.matdes.2016.11.039

DO - 10.1016/j.matdes.2016.11.039

M3 - Article

VL - 115

SP - 64

EP - 72

JO - Materials and Design

JF - Materials and Design

SN - 0264-1275

ER -