Modified elastic compensation method for limit analysis of complex structures

2007 ◽  
Vol 43 (05) ◽  
pp. 187
Author(s):  
Lijie CHEN
Keyword(s):  
Limit Analysis ◽  
Compensation Method ◽  
Complex Structures ◽  
Elastic Compensation Method

The elastic compensation method for limit and shakedown analysis: A review

2000 ◽  
Vol 35 (3) ◽  
pp. 171-188 ◽  
Author(s):  
D Mackenzie ◽  
J T Boyle ◽  
R Hamilton
Keyword(s):  
Elastic Modulus ◽  
Compensation Method ◽  
Complex Structures ◽  
Element Level ◽  
Shakedown Analysis ◽  
Comprehensive Review ◽  
Reduced Modulus ◽  
Modulus Method ◽  
Future Work ◽  
Elastic Compensation Method

A comprehensive review of the elastic compensation method for calculating limit and shakedown load bounds for complex structures is presented. The origins of the method in pressure vessel design by analysis is described and related methods for load and shakedown analysis considered, in particular Marriott's reduced modulus method, Seshadri's GLOSS r-node method and Ponter's modified elastic modulus method. The paper concludes with a recommendation for future work: development of an element level formulation of the method.

125 A study on the application of the Elastic Compensation Method

2001 ◽  
Vol 2001.14 (0) ◽  
pp. 49-50
Author(s):  
Takuji AKIYAMA ◽  
Isoharu NISHIGUCHI ◽  
Masataka SASAKI
Keyword(s):  
Compensation Method ◽  
Elastic Compensation Method

A Study on the Elastic Compensation Method for Design by Analysis Codes

2004 ◽  
Author(s):  
Isoharu Nishiguchi ◽  
Masataka Sasaki
Keyword(s):  
Lower Bound ◽  
Three Dimensional ◽  
Dissimilar Materials ◽  
Compensation Method ◽  
Plastic Collapse ◽  
Collapse Load ◽  
Elastic Plastic ◽  
Body Forces ◽  
Bound Theorem ◽  
Elastic Compensation Method

In the Design by Analysis (DBA) codes, it is important to ensure that the integrity of the structures can be maintained under the various loadings. For this purpose, elastic analyses are not sufficient and generally, elastic-plastic analyses are necessary. However, elastic-plastic analyses are still costly, especially for three-dimensional complex components. To solve this problem, the Elastic Compensation Method (ECM) has been studied, in which a conservative plastic collapse load can be obtained based on the lower bound theorem. In this paper, this investigation, including application of the ECM for combined loadings and body forces has been summarized. Application of the method on a structure consisting of dissimilar materials is also discussed.

Fracture Evaluation Using Limit Analysis for Complex Structure (Pressure Load)

2010 ◽  
Author(s):  
Kiminobu Hojo ◽  
Mayumi Ochi ◽  
Kazuo Ogawa ◽  
Naoki Ogawa
Keyword(s):  
Lower Bound ◽  
Weld Joint ◽  
Limit Analysis ◽  
Material Properties ◽  
Evaluation Method ◽  
Failure Load ◽  
Complex Structure ◽  
Sensitivity Study ◽  
Complex Structures ◽  
Key Issues

The sensitivity study of limit analyses was performed for a cracked weld joint between a pipe and a nozzle. As limit analysis methods, the twice elastic slope method in Sec. III basis, the lower bound asymptotic method and net section criterion for straight pipes were chosen. Evaluation method, FE model’s range and material properties were the parameters for the analyses and those effects or sensitivities on failure load were investigated. Based on the results, the key issues for limit analyses for complex structures, especially a pipe with a nozzle were summarized.

Cell morphology, volume, and surface area determinations from multilevel contouring within HVEM micrographs of serial sections and whole-cell mounts

1987 ◽  
Vol 45 ◽  
pp. 588-589
Author(s):  
M. Marko ◽  
A. Leith ◽  
D. Parsons
Keyword(s):  
Surface Area ◽  
Electron Micrographs ◽  
Cell Morphology ◽  
Individual Variation ◽  
Serial Section ◽  
Stereo Pair ◽  
Complex Structures ◽  
Serial Sections ◽  
Surface Areas ◽  
Computer Based

The use of serial sections and computer-based 3-D reconstruction techniques affords an opportunity not only to visualize the shape and distribution of the structures being studied, but also to determine their volumes and surface areas. Up until now, this has been done using serial ultrathin sections.The serial-section approach differs from the stereo logical methods of Weibel in that it is based on the Information from a set of single, complete cells (or organelles) rather than on a random 2-dimensional sampling of a population of cells. Because of this, it can more easily provide absolute values of volume and surface area, especially for highly-complex structures. It also allows study of individual variation among the cells, and study of structures which occur only infrequently.We have developed a system for 3-D reconstruction of objects from stereo-pair electron micrographs of thick specimens.

Sign in / Sign up

Export Citation Format

Share Document