Effective Dimensional Characteristics of Certain Industrial Welded Structures

2015 ◽  
Vol 760 ◽  
pp. 527-532
Author(s):  
Andreea Mădălina Ene Căscătău ◽  
Daniel Morel ◽  
Marian Gheorghe
Keyword(s):  
Measurement System ◽  
Welding Speed ◽  
Research Method ◽  
Industrial Research ◽  
Quality Characteristics ◽  
Metallic Structure ◽  
Metallic Structures ◽  
Welded Structures ◽  
Geometrical Characteristics

Various studies on the quality characteristics of products manufactured in different industrial conditions have been accomplished. The quality characteristics of welded metallic structures depend of the material and geometrical characteristics of the components, welded gap, welding speed, scheme and time of components fixing, etc. The paper presents main elements of an industrial research on the dimensional characteristics of a certain welded metallic structure. The research method used in this paper is the systematic analyse in industrial conditions, including welding robotised cell and 3D advanced measurement system.

Geometric Deformations of Welded Metallic Structures

2014 ◽  
Vol 657 ◽  
pp. 342-347 ◽  
Author(s):  
Andreea Mădălina Ene Căscătău ◽  
Patrice Plassais ◽  
Marian Gheorghe
Keyword(s):  
Experimental Research ◽  
Process Parameters ◽  
Measurement System ◽  
Quality Characteristics ◽  
Welding Robot ◽  
Metallic Structure ◽  
Metallic Structures ◽  
Welded Structure ◽  
Geometric Deformation ◽  
Set Up

Various research on the influence of different process parameters on quality characteristics of metallic structures assembled by welding have been accomplished [1 - 8, etc.]. The deformations of metallic structure components assembled by welding depend on the characteristics of the components, welded gap, welding speed, scheme and time of components fixing, etc. The paper presents the data and main results of an experimental research on the influence of two process parameters - the welding gap and the fixing time of the components - on the geometric deformations of certain metallic structure components in industrial conditions. Complex experiment and set-up including industrial welding robot and advanced measurement system have been designed and used. The geometric deformations of the welded metallic structure components are caused by forces and phenomenon heating - cooling, i.e. dilatation - contraction, respectively, acting during the periods of fixing - welding, fixing - cooling, cooling without fixing. Relevant dependences between the geometric deformation of welded structure and the considered influencing process parameters have been evidenced.

scholarly journals Defect Detection in CK45 Steel Structures through C-scan Images Using Deep Learning Method

2021 ◽  
Vol 3 (1) ◽  
Author(s):  
Navid Moshtaghi Yazdani
Keyword(s):  
Neural Network ◽  
Deep Learning ◽  
Measurement System ◽  
Processing System ◽  
Steel Structures ◽  
Learning Method ◽  
Metallic Structures ◽  
Defect Profile ◽  
Network Methods ◽  
Deep Convolution Neural Network

In the present paper, a method for reliable estimation of defect profile in CK45 steel structures is presented using an eddy current testing based measurement system and post-processing system based on deep learning technique. So a deep learning method is used to determine the defect characteristics in metallic structures by magnetic field C-scan images obtained by an anisotropic magneto-resistive sensor. Having designed and adjusting the deep convolution neural network and applied it to C-scan images obtained from the measurement system, the performance of deep learning method proposed is compared with conventional artificial neural network methods such as multilayer perceptron and radial basis function on a number of metallic specimens with different defects. The results confirm the superiority of the proposed method for characterizing defects compared to other classical training-oriented methods.

scholarly journals On Deformability of Crane Metallic Structures

2018 ◽  
Vol 251 ◽  
pp. 03035 ◽  
Author(s):  
Anatoly Vershinsky ◽  
Aleksandr Shubin ◽  
Aleksander Masyagin
Keyword(s):  
Life Cycle ◽  
Specific Interaction ◽  
Experimental Studies ◽  
Overhead Crane ◽  
Metallic Structure ◽  
Metallic Structures ◽  
Beam Elements ◽  
Residual Welding ◽  
Dimensional Parameters

Problems of metallic crane structure deformability are considered. This paper contains results of experimental studies on deformability of overhead crane beam elements. These studies take into account the specific interaction between stresses arising from the product’s exposure to loads at various stages of its life cycle, from manufacturing to operation, and residual welding stresses. Recommendations are provided to help stabilize the dimensional parameters of a crane metallic structure.

scholarly journals Considerations on the Use of Explosive Substances for the Destruction of Metallic Structures

2019 ◽  
Vol 24 (2) ◽  
pp. 139-144
Author(s):  
Florin Ilie ◽  
Mircea Vladu ◽  
Gabriela Mihăilă-Lică ◽  
Bogdan-Mihai Georgescu
Keyword(s):  
Public Order ◽  
Metallic Materials ◽  
Metallic Elements ◽  
Metallic Structure ◽  
Destructive Effect ◽  
Metallic Structures ◽  
Degree Of Risk ◽  
Explosive Substance ◽  
High Degree

Abstract Incidents with IEDs containing metallic elements in the vicinity of the explosive substance pose a high degree of risk, endangering safety, peace and public order. In such situations, the methods and procedures applied as response by the authorities are cumbersome and risky, given the improvised nature of these incidents. In this paper we intend to analyze the destructive effect of explosive substances on certain metallic materials and we focus on a U-shaped metallic structure.

Applicability of X-Ray Diffraction Technique for Stresses Quantification in Metallic Structural Elements

2010 ◽  
Vol 133-134 ◽  
pp. 211-216
Author(s):  
Santiago Sánchez-Beitia ◽  
Javier Barrallo
Keyword(s):  
Residual Stresses ◽  
Experimental Work ◽  
Research Group ◽  
Civil Engineering ◽  
Structural Elements ◽  
Metallic Structure ◽  
X Ray Diffraction ◽  
Metallic Structures ◽  
X Ray ◽  
Applied Stresses

Since 2009 the research group managed by the authors promotes the applicability of X-Ray Diffraction technique (NDT) for global stresses measurements in metallic structures for civil engineering and building. There exists standard portable equipments in the market for different applications of those here shown (residual stresses measurements). This paper shows some tests prior the complete calibration for any situation in such a way that can be applied to the quantification of stresses in service. Until now a metallic bar at the Oporto Cathedral, two corrugate bars at laboratory and a small metallic structure at laboratory have been tested. This last experimental work is here shown. The stresses obtained are the sum of the residual stresses and the external applied stresses. Currently the group works in order to remove the effect of the residual stresses by means of tests on small metallic structures specifically built.

scholarly journals Perbandingan Sistem Pengukuran Kinerja Perusahaan

2015 ◽  
Vol 6 (1) ◽  
pp. 91
Author(s):  
Freddy Simbolon
Keyword(s):  
Performance Measurement ◽  
Measurement System ◽  
Research Method ◽  
External Environment ◽  
Decision Makers ◽  
Performance Measurement System ◽  
Measurement Systems ◽  
Advantages And Disadvantages ◽  
Performance Measurement Systems ◽  
Descriptive Method

Corporate performance is a measure of the level of success in managing resource company to create value for share holders and stakeholders. Many of the company's performance measurement system can be used, but the future of performance measurement systems are no longer limited only to the measurement of financial performance, yet more comprehensive and integrated to non-financial aspects of the coverage of measurements on the internal and external environment. There are three performance measurement system that meets these criteria is the BSC, IPMS, and Prism. This research method is using descriptive method of analysis. This study aims to assess the three systems that get the best system to choose. All three systems have advantages and disadvantages, so the best option is a performance measurement system compatibility with the company'scondition and capabilities of decision makers.

scholarly journals Reliability-Based Design Optimization for Crane Metallic Structure Using ACO and AFOSM Based on China Standards

2015 ◽  
Vol 2015 ◽  
pp. 1-12 ◽  
Author(s):  
Xiaoning Fan ◽  
Xiaoheng Bi
Keyword(s):  
Design Optimization ◽  
Optimal Solution ◽  
Probabilistic Constraints ◽  
Metallic Structure ◽  
Reliability Based Design Optimization ◽  
Metallic Structures ◽  
Practical Applications ◽  
Reliability Indices ◽  
Uncertain Variables ◽  
Reliability Based Design

The design optimization of crane metallic structures is of great significance in reducing their weight and cost. Although it is known that uncertainties in the loads, geometry, dimensions, and materials of crane metallic structures are inherent and inevitable and that deterministic structural optimization can lead to an unreliable structure in practical applications, little amount of research on these factors has been reported. This paper considers a sensitivity analysis of uncertain variables and constructs a reliability-based design optimization model of an overhead traveling crane metallic structure. An advanced first-order second-moment method is used to calculate the reliability indices of probabilistic constraints at each design point. An effective ant colony optimization with a mutation local search is developed to achieve the global optimal solution. By applying our reliability-based design optimization to a realistic crane structure, we demonstrate that, compared with the practical design and the deterministic design optimization, the proposed method could find the lighter structure weight while satisfying the deterministic and probabilistic stress, deflection, and stiffness constraints and is therefore both feasible and effective.

Characterization of Spectral Response of a FBG Sensor Embedded in a Metallic Structure Using Laser Solid Freeform Fabrication

2006 ◽  
Author(s):  
Hamidreza Alemohammad ◽  
Ehsan Toyserkani
Keyword(s):  
Solid Freeform Fabrication ◽  
Spectral Response ◽  
Element Model ◽  
Metallic Structure ◽  
Metallic Structures ◽  
Freeform Fabrication ◽  
Fbg Sensor ◽  
Fbg Sensors ◽  
Laser Solid Freeform Fabrication

This paper focuses on spectral response characterization of fiber Bragg grating (FBG) sensors embedded in metallic structures using laser solid freeform fabrication (LSFF). Fiber Bragg grating sensors are capable of measuring temperature, strain and pressure and can be embedded in metallic structures to monitor thermal and structural loads. Due to the sensitivity of the FBG sensors to high temperatures and stresses, the embedding process using LSFF is a challenging task. In the present work, a finite element model is developed to predict the stress and temperature fields adjacent to the fiber optic sensor embedded the metallic structure. The FE results are transferred to opto-mechanical model of the FBG sensor to predict the change in the spectral response of the sensor. Finally, the finite element model is verified using an existing analytical model which predicts the temperature field and melt pool geometry in LSFF process.

scholarly journals Effect of the number of non-conforming samples on the Kappa indicator values

2018 ◽  
Vol 183 ◽  
pp. 03014 ◽  
Author(s):  
Pavel Klaput ◽  
David Vykydal
Keyword(s):  
Measurement System ◽  
Explanatory Power ◽  
Quality Characteristics ◽  
System Quality ◽  
Indicator Values ◽  
Multiple Methods ◽  
Cross Tabulation ◽  
The Cross

Evaluate the quality of this measurement system is possible by using multiple methods, which are described in the methodology guides for evaluation of the measurement system quality. Within these methods, values of different indicators are evaluated. This paper deals with the cross tabulation method and foremost Kappa indicator. More specifically is examined the effect of the number of used nonconforming samples on explanatory power of this indicator. The effect on the kappa values is examined from several aspects that must be taken into account during evaluation of the quality of measurement system for attributive quality characteristics.

Some Geometrical Characteristics of the Long-Lived Solar Filaments

1994 ◽  
Vol 144 ◽  
pp. 387-389
Author(s):  
P. Duchlev ◽  
Z. Mouradian ◽  
V. N. Dermendjiev
Keyword(s):  
Filament Length ◽  
Geometrical Characteristics ◽  
Solar Filaments

AbstractTwo basic geometric quantities - the filament length and the height above the limb of the long-lived filaments are studied. Some statistical relations are obtained.

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