Buckling Tests for Laser-Welded Single Corrugated Core

Abstract:

This study was employed to investigate the buckling effect for a single Vf corrugated core. Brief and simple designing method is developed for UHS sandwich structure. This method is based on simplified calculation of slenderness ratio integrated with FEM simulation. Method is developed for studying the local buckling resistance of sandwich structures to optimize the panel dimensions for maximal stiffness. Five different core dimensions were tested (angles of 110-135 ° and height of 35 - 55 mm). Buckling tests were made using two different steel grades; ultra-high-strength (UHS) ARS400 and DC01 mild steel. For comparison, FEM simulations were carried out for the ARS400. The results showed that even 600% higher bending resistance can be achieved for the panel structure using the ultra-high strength steel instead of the low strength counterpart. The comparison showed that the FEM-simulations can be used reliably estimating the buckling effects in UHS panel structures. The difference between the empirical and simulation results was 5.3% in average (S.D. 4.1). In practical tests, best angle and height for the ARS400 was 110 ° and 35 mm respectively. For the DC01, the best dimensions were 125 ° and 35 mm.

• Periodical: Key Engineering Materials (Volume 786)
• Pages: 269-275
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.786.269
• Online since: October 2018
• Authors: Tero Jokelainen*, Antti Järvenpää, Markku Keskitalo, Mikko Hietala, Aappo Mustakangas, Kari Mäntyjärvi
• Keywords: Buckling, Finite Element Analysis, Sandwich Panel, Slenderness Ratio, Static-Failure

References

[1] Jokelainen T. et al. Iterative weight reduction process, Journal of Ship Production and Design. Accepted 24.8.(2017).

[2] Kananen M et al. Laser welded corrugated steel panels in industrial applications, Physics Procedia. 78 (2015) 202-209.

DOI: 10.1016/j.phpro.2015.11.044

[3] Kuber K. et al. Design and analysis of sandwich structure of single girder electric overhead travelling crane girder for weight reduction, Journal of Emerging Technologies and Innovative Research (JETIR) 1, 232-236.

[4] Gopichand A. et al. Design and analysis of corrugated steel sandwich structures using ansys workbench, International Journal of Engineering Research & Technology (IJERT) 1 (2012).

[5] Magnucki K. et al. Strength and buckling of sandwich beams with corrugated core, Journal of Theoretical and Applied Mechanics 51 (2013) 15-24.

[6] Hietala M. et al. Mechanical behaviour of laser-welded corrugated panels of ultrahigh strength steel, 16th International Conference on New Trends in Fatigue and Fracture (NT2F16) May 24-27 (2016) Dubrovnik,Croatia.

[7] Sun Y. et al. Analysis and experiment on bending performance of laser-welded web-core sandwich plates, Joint 3rd UK-China Steel Research Forum & 15th CMA-UK Conference on Materials Science and Engineering (2015).

[8] Zhang P. et al. Experimental and numerical investigations on laser-welded corrugated-core sandwich panels subjected to air blast loading, Marine Structures 40 (2015) 225-246.

DOI: 10.1016/j.marstruc.2014.11.007

[9] Zhu J. and Chu X. An improved arc-length method and application in the post-buckling analysis for composite structures, Applied Mathematics and Mechanics 23 (2002) 1081-1088.

DOI: 10.1007/bf02437719

[10] Hietala M. et al. Bending strength of laser-welded sandwich steel panels of ultra-high strength steel, Key Engineering Materials (submitted 2018).

DOI: 10.4028/www.scientific.net/kem.786.286

[11] Hedayati E. Critical buckling load analysis of truck chassis using arc-length method, Journal of Engg. Research 3 (2015) 129-140.

[12] Komur M. Elasto-plastic buckling analysis of perforated steel plates subject to uniform compression, Mechanics Research Communications 38 (2011) 117-122.

DOI: 10.1016/j.mechrescom.2011.01.001