Emerging Challenges for Numerical Simulations of Quasi-Static Collision Experiments on Laser-Welded Thin-Walled Steel Structures

作     者：Jani Romanoff &Mihkel Körgesaar Heikki Remes Jani Romanoff;Mihkel Körgesaar;Heikki Remes

作者机构：Department of Mechanical EngineeringAalto University00076 EspooFinland Estonian Maritime AcademyTallinn University of TechnologyTallinna 1993811 KuressaareEstonia 

出 版 物：《Journal of Marine Science and Application》 (船舶与海洋工程学报（英文版）)

年 卷 期：2020年第19卷第4期

页      面：567-583页

核心收录：

学科分类：08[工学] 0824[工学-船舶与海洋工程] 082401[工学-船舶与海洋结构物设计制造] 

基　　金：The experimental program would not have been possible without the funding by the 100-Year Foundation of the Federation of Finnish Technology Industries and the Scientific Advisory Board for Defense.The analyses were carried out in project called Ultra Lightweight and Fracture Resistant Thin-Walled Structures through Optimization of Strain Paths by the Academy of Finland(310828).This work was also supported by the Estonian Research Council grant PSG526 

主　　题：Collision and grounding Experiments Thin-walled structure Finite element analysis Welding 

摘      要：This paper re-evaluates recently published quasi-static tests on laser-welded thin-walled steel structures in order to discuss the fundamental challenges in collision simulations based on finite element *** square panels were considered,with spherical indenter positioned at the mid-span of the stiffeners and moved along this centerline in order to change the load-carrying mechanism of the ***,the use of panels with single-sided flat bar stiffening and web-core sandwich panels enabled the investigation of the effect of structural topology on structural behavior and *** changes in loading position and panel topology resulted in different loading,structural and material *** web-core panels,these three gradients occur at the same locations making the panel global responses sensitive for statistical variations and the failure process *** stiffened panel with reduced structural gradient,this sensitivity and time-dependency in failure process is not *** observations set challenges to numerical simulations due to spatial and temporal discretization as well as the observed microrotation,which is beyond the currently used assumptions of classical continuum ***,finally,we discuss the potential of non-classical continuum mechanics as remedy to deal with these phenomena and provide a base for necessary development for future.