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174 results on '"Yao, Tetsuya"'

16. Buckling/elastoplastic collapse behavior and strength of continuous tee-bar stiffened plates

Author

Mukherjee, Kenneth Sunil and Yao, Tetsuya

Subjects
Residual stresses -- Analysis, Science and technology
Abstract

The influence of residual stress distributions should be properly token into account in the structural analysis of stiffened plates. The generally assumed residual stress distributions in the analyses often have constant values across their cross sections. This approximation is also applied to identical stiffeners that are constructed by different methods, such as rolled and built-up tee-bar stiffened plates. This paper focuses on buckling/plastic collapse behavior of rolled and built-up tee-bar stiffened plates with experimentally determined residual stress distributions in their cross sections. The structural behavior until collapse of these two types of tee-bar stiffeners is analyzed in detail, using residual stresses measured from experimental results. Various numerical modelling aspects of stiffened plated structures are briefly discussed and finally the influence of differences in residual stress distributions on buckling/plastic collapse behavior of continuous stiffened plates is studied based on selected results, using the Finite Element Method. [DOI: 10.1115/1.2185131] Keywords: local buckling strength, buckling/plastic collapse analysis, residual stress distribution

Published
2006

25. Buckling and Ultimate Strength of Ship and Ship-like Floating Structures

Author

Yao, Tetsuya, Fujikubo, Masahiko, Yao, Tetsuya, Yao, Tetsuya, Fujikubo, Masahiko, and Yao, Tetsuya

Abstract

Buckling and Ultimate Strength of Ship and Ship-like Floating Structures provides an integrated state-of-the-art evaluation of ship structure mechanics including buckling, plastic failure, ultimate strength, and ultimate bending moments. For the design of any industrial product, it is necessary to understand the fundamentals in the failure behavior of structures under extreme loads. Significant developments have been made in understanding the analysis method of plastic collapse and behavior and strength of structures accompanied by buckling. Written by two of the foremost experts in international ship design and ocean engineering, this book introduces fundamental theories and methods as well as new content on the behavior of buckling/plastic collapse that help explain analysis like the initial imperfections produced by welding and the ultimate strength of plates, double bottom structures of bulk carriers, and ship and FPSO hull girders in longitudinal bending. Rounding out with additional coverage on floating structures such as oil and gas platforms and LNG/FLNG structural characteristics, Buckling and Ultimate Strength of Ship and Ship-like Floating Structures is a must-have resource for naval architects and other marine engineering professionals seeking to gain an in-depth understanding of the technological developments in this area.Explains how the initial imperfections produced by welding, residual stress, and initial deflection in panels influence the collapse behavior and the compressive ultimate strength of rectangular platesEvaluates the ultimate strength of plate girders under bending and shearing as well as combined bend/shear loadsProvides fundamental theories, simple formulas, and analytical methods such as Finite Element Method or Smith's Method to simulate and evaluate buckling/plastic collapse behavior and strength of plates under various conditionsAuthored by two of the foremost experts in international ship design and ocean engineeringIncludes addit

Published
2016

44. Collapse Analysis of Double Bottom Structures Considering Shear, Lateral Pressure and Welding Residual Stress.

Author

Chu Gao, Zhiyong Pei, Yasuoka, Aya, Tanaka, Satoyuki, Okazawa, Shigenobu, Alie, Zubair Mmuis, Iijima, Kazuhiro, Fujikubo, Masahiko, and Yao, Tetsuya

Abstract

The article discusses the results of a collapse analysis of double structures of a Kamsarmax type bulk carrier using idealized structural unit method (ISUM). Factors considered include the effects of shear in web of floors and girders, lateral pressure on plating and welding residual stress on collapse behavior and strength. The validity of the ISUM analyses results were done through collapse analyses using nonlinear finite element method (FEM) software, MSC.Marc.

Published
2011

45. Collapse Analysis of Container Ship Model under Combined Bending and Torsion Applying Idealized Structural Unit Method.

Author

Zhiyong Pei, Chu Gao, Tanaka, Yoshiteru, Tanaka, Satoyuki, Okazawa, Shigenobu, Iijima, Kazuhiro, Fujikubo, Masahiko, and Yao, Tetsuya

Abstract

The article discusses the results of a series of progressive collapse analyses on 1/13-scale container ship models subjected to pure bending, pure torsion and combined bending and torsion using idealized structural unit method (ISUM) created by the research authors. A comparison between the calculated load-displacement relationships and the experimental results as well as the calculated results applying nonlinear finite element method (FEM) was also performed.

Published
2011

46. Development of Isoparametric ISUM Plate Element.

Author

Zhiyong Pei, Yu Ji, Nakamaru, Keiji, Tanaka, Satoyuki, Okazawa, Shigenobu, Fujikubo, Masahiko, and Yao, Tetsuya

Abstract

The article discusses a study about the development of new non-rectangular quadrilateral Idealised Structural Unit Method (ISUM) element in accordance with the formulation of the isoparametric finite element method (FEM) element. A comparison is made between calculated results applying the new element and those by nonlinear FEM analyses. FEM is described as a general application for structural analyses on a ship's hull girder. A simulation of collapse behavior under in-plane thrust load is made with the element.

Published
2010

47. Development of ISUM Shear Plate Element and Its Application to Progressive Collapse Analysis of Plates under Combined Loading.

Author

Pei, Zhiyong, Takami, Tomoki, Gao, Chu, Fu, Jiaheng, Tanaka, Yoshiteru, Iijima, Kazuhiro, Fujikubo, Masahiko, and Yao, Tetsuya

Abstract

The article discusses a study where shear collapse behavior is introduced in an Idealized Structural Unit Method (ISUM) plate element. ISUM is described as a simple and efficient method to simulate ship structures' progressive collapse behavior. A series of comparison analyses utilizing nonlinear finite element method (FEM) and developed ISUM shear plate element is used to examine accuracy and effectiveness results including cases of buckling/collapse behavior under pure shear, combined shear and bending, and combined transverse thrust and shear.

Published
2010

49. Total System Including Capacity Calculation Applying ISUM/FEM and Loads Calculation for Progressive Collapse Analysis of Ship's Hull Girder in Longitudinal Bending.

Author

Yao, Tetsuya, Fujikubo, Masahiko, Iijima, Kazuhiro, and Pei, Zhiyong

Abstract

The article discusses the proposed new method developed that combines nonlinear analyses on pressure distribution and structural response to assess the safety of ship structure in terms of ultimate hull girder strength. It explores the use of a three dimensional singularity distribution technique in the pressure distribution analysis and the use of the new combined Finite Element Method (FEM) and Idealised Structural Unit Method (ISUM) system for the structural response analysis.

Published
2009

50. Longitudinal Strength of Container Ships under Combined Torsional and Bending Moments.

Author

Tanaka, Yoshiteru, Ando, Takahiro, Anai, Yousuke, Yao, Tetsuya, Fujikubo, Masahiko, and Iijima, Kazuhiro

Abstract

The article presents a study which evaluated the effect of torsional moment on the strength of container ships in longitudinal bending. The study used the progressive collapse tests using 1/13-scale three-hold models. The results were compared with those of elasto-plastic finite element analysis using the LS-DYNA software. Nonlinear finite element analyses have been executed to estimate the effect of torsional moment on the ultimate vertical bending moment.

Published
2009

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