Ultimate Compressive Strength Computational Modeling for Stiffened Plate Panels with Nonuniform Thickness
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RESEARCH ARTICLE
Ultimate Compressive Strength Computational Modeling for Stiffened Plate Panels with Nonuniform Thickness Hyun Ho Lee 1 & Jeom Kee Paik 1,2,3 Received: 8 May 2020 / Accepted: 1 August 2020 # The Author(s) 2020
Abstract The aim of this paper is to develop computational models for the ultimate compressive strength analysis of stiffened plate panels with nonuniform thickness. Modeling welding-induced initial deformations and residual stresses was presented with the measured data. Three methods, i.e., ANSYS finite element method, ALPS/SPINE incremental Galerkin method, and ALPS/ULSAP analytical method, were employed together with existing test database obtained from a full-scale collapse testing of steel-stiffened plate structures. Sensitivity study was conducted with varying the difference in plate thickness to define a representative (equivalent) thickness for plate panels with nonuniform thickness. Guidelines are provided for structural modeling to compute the ultimate compressive strength of plate panels with variable thickness. Keywords Ultimate compressive strength . Steel-stiffened plate structures . Nonuniform plate thickness . ANSYS finite element method . ALPS/SPINE incremental Galerkin method . ALPS/ULSAP analytical method
1 Introduction Plate panels are used in naval, offshore, mechanical, aerospace, and civil engineering structures as primary strength parts of ships, ship-shaped offshore installations, fuselages, box-girder cranes, and bridges. They are usually designed Article Highlights • Computational models for the ultimate compressive strength analysis of stiffened plate panels with nonuniform thickness. • Application of the three methods of ANSYS finite element method, ALPS/SPINE incremental Galerkin method, and ALPS/ULSAP analytical method. • Validation of the computational models by a comparison with full-scale physical test. • Guidelines for structural modelling to compute the ultimate compressive strength of stiffened plate panels with nonuniform thickness * Jeom Kee Paik [email protected] 1
Department of Naval Architecture and Ocean Engineering, Pusan National University, Busan, South Korea
2
The Korea Ship and Offshore Research Institute (Lloyd’s Register Foundation Research Centre of Excellence), Pusan National University, Busan, South Korea
3
Department of Mechanical Engineering, University College London, London, UK
and built with a uniform thickness over the plating, but nonuniform thickness is sometimes allocated to fulfill practical design requirements (Zenkour 2003; Lee et al. 2019; Tash and Neya 2020). During the past several decades, the emphasis on structural design has moved from the allowable stress design to the limit state design because the latter approach makes possible a rigorously designed, yet economical, structure that directly takes into consideration the various relevant modes of failure (Paik 2018). Furthermore, limit states are key criteria within the framework of quantitative risk assessment and management which is now recognized to be the best
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