scholarly journals Researches on Britlle Fracture Initiation of Welded Steel Structure in Japan (Part 2)

1973 ◽  
Vol 42 (4) ◽  
pp. 364-378
Author(s):  
Hiroshi Kihara ◽  
Kunihiko Satoh ◽  
Masao Toyoda
Keyword(s):  
Steel Structure ◽  
Fracture Initiation ◽  
Welded Steel

A Case Study Of The Use Of Ultrasonic Peening For Upgrading A Welded Steel Structure

2011 ◽  
Vol 55 (9-10) ◽  
pp. 56-67 ◽  
Author(s):  
Stephen J. Maddox ◽  
M. J. Doré ◽  
Simon D. Smith
Keyword(s):  
Steel Structure ◽  
Welded Steel ◽  
Ultrasonic Peening

Soft-Sensing Model of Deformation of Welded Steel Structure Based on FLS-SVM and its Application

2014 ◽  
Vol 628 ◽  
pp. 152-156
Author(s):  
Ji Ping Lei ◽  
Jian Mei Chen
Keyword(s):  
Relative Error ◽  
Welding Current ◽  
Steel Structure ◽  
Support Vector ◽  
Adaptive Genetic Algorithm ◽  
Practical Application ◽  
Soft Sensing ◽  
Welded Steel ◽  
Welded Structure ◽  
Sensing Model

To effectively achieve rapid and high-precision measurements of the deformation of steel welded structure, multiple sets of the actual experimental data of steel welded structure are used as the samples, the soft-sensing model of deformation of welded steel structure, which uses the welding current I, the welding voltage U, the welding speed v and the flow of gas qm as arguments, is established by fuzzy least squares support vector machine, and adaptive genetic algorithm is used to optimize the number of positive gasification rules c and the parameters of kernel function σ, training, testing and practical application results show, the optimization of 200 steps, the training relative error which become saturated is 2.43%, the testing relative error is less than 2.45%.

Significant Alloy Elements in Welded Steel Structures of Car Body

2012 ◽  
Vol 57 (1) ◽  
pp. 45-52 ◽  
Author(s):  
T. Węgrzyn ◽  
R. Wieszała
Keyword(s):  
Steel Structure ◽  
Steel Structures ◽  
Filler Materials ◽  
Main Role ◽  
Welded Steel ◽  
Car Body ◽  
Welding Method ◽  
Welding Steel ◽  
Selection Of

Significant Alloy Elements in Welded Steel Structures of Car Body Structure, safety and exploitation conditions of welding steel in car body depend on many factors. The main role of that conditions is connected with car body material, welding technology, state of stress and temperature. Because of that, a good selection of steel and welding method is very important for proper steel structure. Low alloy steel is used for car body structure, very often with small amount of carbon and the amount of alloy elements such as Ni, Mn, Mo, Cr and V in car body and welded joints. Depending on the kind of steel which is used, a proper welding method and adequate filler materials should be applied. The present paper describes the influence of Mn, Ni, Mo, Cr, V in WMD (Weld Metal Deposit) on the behaviour of steel structure especially for low temperature service.

scholarly journals Strength Analysis of a Steel Structure of Weights Boxes by Means of Simulation Computations

2017 ◽  
Vol 8 (1) ◽  
pp. 11-19
Author(s):  
Miroslav Blatnický ◽  
Ján Dižo ◽  
Stasys Steišūnas
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Total Mass ◽  
Mass Measurement ◽  
Steel Structure ◽  
Theory Of Elasticity ◽  
The Other ◽  
Strength Analysis ◽  
The Finite Element Method ◽  
Welded Steel

Abstract In this article the strength analyses of weights boxes are presented. Boxes are designed as a welded steel structure at which weights with total mass almost ten tons are stored in them. These boxes are an integral part of a mechanism intended for calibration of the mass measurement device. The article contains on one hand the basic scope of the theory of elasticity and strength analysis and on the other hand the numerical computations of the structure by using the Finite Element Method. Based on results the structure of weights boxes was modified in order to satisfy the defined safety factor.

The Prediction Method of S-N Curve for Welded Steel Structure Using Critical Distance Theory

2012 ◽  
Vol 193-194 ◽  
pp. 1436-1439
Author(s):  
De Qing Guan ◽  
Yan Hui Pan
Keyword(s):  
Residual Stress ◽  
Fatigue Strength ◽  
Numerical Analysis ◽  
Engineering Application ◽  
Prediction Method ◽  
Steel Structure ◽  
Critical Distance ◽  
Residual Stress Field ◽  
Welded Steel ◽  
Volume Method

The welded steel structure is used as the research object in this paper. On the basis of numerical analysis of welded steel structure in 3-D residual stress field, the predicted method of the fatigue strength and S-N curve for welded steel structure is set using the volume method of the critical distance theory. The fatigue strength and S-N curve of the typical the welded steel structure including butt, misaligned welded and T-shape joints are got through theory prediction. The predicted value coincides with the experimental value. This method can be reduced fatigue test, saved funds and provided reference for engineering application.

scholarly journals Some Basic Considerations on Brittle Crack Arrester For Welded Steel Structure. (The 1st Report)

1964 ◽  
Vol 1964 (115) ◽  
pp. 78-88 ◽  
Author(s):  
Takeshi Kanazawa ◽  
Susumu Machida ◽  
Masaaki Matoba
Keyword(s):  
Steel Structure ◽  
Brittle Crack ◽  
Welded Steel ◽  
Crack Arrester

Experimental Study to Calibrate Monotonic Micromechanics-Based Fracture Models of Q345 Steel

2011 ◽  
Vol 261-263 ◽  
pp. 545-550 ◽  
Author(s):  
Fang Fang Liao ◽  
Wei Wang ◽  
Yi Yi Chen
Keyword(s):  
Ductile Fracture ◽  
Good Accuracy ◽  
Steel Structures ◽  
Fracture Initiation ◽  
Monotonic Loading ◽  
Welded Steel ◽  
Steel Connections ◽  
Metal Deposit ◽  
Fracture Models ◽  
Material Tests

Micromechanics-based facture models have been proved to predict ductile fracture in steel structures with good accuracy. The stress modified critical strain (SMCS) model and the void growth model (VGM) are suitable to predict fracture initiation under monotonic loading. In order to calibrate the parameters in these models for the largely used Q345 steel in China, material tests, scanning electron microscope tests and finite element analyses were conducted. The test specimens were made from base metal, deposit metal and heat affected zone of Q345 steel to investigate crack initiation in welded connections. The results of this paper can be applied to predict ductile fracture in welded steel connections under monotonic loading.

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