Weight optimization of stainless‐steel built‐up structural elements

ce/papers ◽  
2021 ◽  
Vol 4 (2-4) ◽  
pp. 2295-2298
Author(s):  
Raminta Venslavavičiūtė ◽  
Alfonsas Daniūnas
Keyword(s):  
Stainless Steel ◽  
Structural Elements ◽  
Weight Optimization

scholarly journals ANALISYS OF THE INFLUENCE OF GLUE JOINTS ON THE MEASUREMENT OF PHYSICAL PROPERTIES OF STRUCTURAL ELEMENTS USING FIBER BRAGG GRATING

2020 ◽  
Vol 10 (3) ◽  
pp. 99-102
Author(s):  
Tomasz Zieliński ◽  
Łukasz Zychowicz
Keyword(s):  
Stainless Steel ◽  
Physical Properties ◽  
Fiber Bragg Grating ◽  
Transmission Spectrum ◽  
Measuring Transducer ◽  
Bragg Grating ◽  
Transmission Characteristic ◽  
Test Results ◽  
Structural Elements ◽  
Factors Affecting

The research presents the analysis of the influence of the glue connection on the measurement of elongation of stainless steel and aluminum samples by means of fiber Bragg grating (FBG) with uniform fibers used as a measuring transducer. Research indicates two possible factors affecting the deformation of the transmission spectrum obtained during elongation measurement. One of them is the type of adhesive that is used to make the connection between the fiber Bragg grating and the tested sample. The second possible factor is method of connection's execution. The need for research on glue connection resulted from the formation of defects mainly in the form of numerous side bands visible in the transmission spectrum during the measurement of elongations. The test results were presented in the form of graphs obtained on the basis of transmission characteristic.

Material Characterisation and Constitutive Modelling of a Copper Alloy and Stainless Steel at Cryogenic and Elevated Temperatures

2015 ◽  
Vol 830-831 ◽  
pp. 242-245
Author(s):  
A.K. Asraff ◽  
S. Sheela ◽  
Krishnajith Jayamani ◽  
S. Sarath Chandran Nair ◽  
R. Muthukumar
Keyword(s):  
Stainless Steel ◽  
Copper Alloy ◽  
High Performance ◽  
Elevated Temperatures ◽  
Outer Wall ◽  
Constitutive Modelling ◽  
Rocket Engines ◽  
Structural Elements ◽  
Thrust Chamber ◽  
High Thrust

High performance rockets are developed using cryogenic technology. High thrust cryogenic rocket engines operating at elevated temperatures and pressures are the backbone of such rockets. The thrust chamber of such engines, which produce the thrust for the propulsion of the rocket, can be considered as structural elements. Often double walled construction is employed for these chambers for better cooling and enhanced performance. The thrust chamber investigated here has its hot inner wall fabricated out of a high conductivity high ductility copper alloy and outer wall made of a ductile stainless steel. The engine is indigenously designed and developed by ISRO and is undergoing hot tests. Inner wall is subjected to high thermal and pressure loads during operation of engine due to which it will be in the plastic regime. Evaluation of tensile properties of the copper alloy and stainless steel up to fracture, at cryogenic, ambient and elevated temperatures in parent metal and welded forms is of paramount importance for its constitutive modelling and thermo structural analysis of the thrust chamber.

scholarly journals The new buckling curves for cold-formed stainless steel equal-leg angle columns

2021 ◽  
Vol 64 (3) ◽  
pp. 171-176
Author(s):  
Jelena Dobrić ◽  
Aljoša Filipović ◽  
Nancy Baddoo ◽  
Zlatko Marković ◽  
Dragan Buđevac
Keyword(s):  
Experimental Investigation ◽  
Stainless Steel ◽  
Numerical Analysis ◽  
Structural Elements ◽  
European Standard ◽  
Torsional Buckling ◽  
Steel Alloys ◽  
Design Rules ◽  
Flexural Torsional Buckling ◽  
Geometric Nonlinear Analysis

The design rules for centrically compressed stainless steel equal-leg angle members are not explicitly stated in the current European standard SRPS EN 1993-1-4. This paper summarizes the results of extensive research conducted on this type of structural elements aiming to define recommendations for their design. Based on a systematic experimental investigation, a detailed numerical analysis was performed, and a database of columns' resistances were defined. Material and geometric nonlinear analysis included three key stainless steel alloys, austenitic, ferritic and duplex. The design curves for flexural and flexural-torsional buckling check have been proposed in accordance with European codified procedures.

scholarly journals THE INFLUENCE OF MICROALLOYING WITH BORON ON PROPERTIES OF AUSTENITE STAINLESS STEEL X8CRNIS18-9

2021 ◽  
Vol 9 (10) ◽  
pp. 695-700
Author(s):  
Dervis Mujagic ◽  
◽  
Aida Imamovic ◽  
Mustafa Hadzalic ◽  
◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Stainless Steel ◽  
Corrosion Resistance ◽  
Austenitic Stainless Steel ◽  
Stainless Steels ◽  
Operating Conditions ◽  
Structural Elements ◽  
Austenite Stainless Steel ◽  
Transverse Strength ◽  
Metallic Inclusions

More recently a modified stainless steels have been used to produce various structural elements that work in complex operating conditions. Stainless steel X8CrNiS18-9 (standard EN 10088-3: 2005) is the most commonly used austenitic stainless steel due to its good machinability. This steel has high mechanical and working properties thanks to a complex alloying, primarily with the elements such as chromium and nickel. The content of sulphur present in the steel from 0.15 to 0.35% improves machinability. However, while sulphur improves machinability at the same time decreases the mechanical properties particularly toughness. The addition of sulphur, which is the cheapest available additive for free machining, will impair not only the transverse strength and toughness, but also the corrosion resistance.The aim of this work is to determine the influence of microalloying with boron on the machinability, corrosion resistance and mechanical properties the mentioned steel, but alsoto determine the effect of microalloying with boron on above steel, which is already microalloyed with zirconium, tellurium, or both elements (zirconium and tellurium) due to modification of non-metallic inclusions and improvement of properties.

Neue kostengünstige rostfreie Stähle für den Einsatz bei korrosionsgefährdeten Stahlbetontragwerken / New and inexpensive stainless steels for use in reinforced concrete structures in agressive environment

1999 ◽  
Vol 5 (6) ◽  
pp. 589-598
Author(s):  
A. Rechsteiner ◽  
M. O. Speidel
Keyword(s):  
Stainless Steel ◽  
Stainless Steels ◽  
Mechanical Load ◽  
Swiss Federal Institute ◽  
Structural Elements ◽  
Wide Spread ◽  
Mechanical Loads ◽  
Federal Institute ◽  
Duplex Steel ◽  
Metal Research

Abstract Stainless steel is essentially applied in structural elements in which chemical and mechanical loads are combined and which hardly allow periodic checks. Fixations are typical examples. In case of failure dramatic consequences have to be expected. This is also valid for steel reinforcement in concrete. It is exposed to combined chemical and mechanical load, it can hardly be controled and damage leads at least to enormous costs of repair. Due to the fact that up to now the expenditures for construction are rarely considered together with the expenditures for maintenance, the use of stainless steel is still exceptional. If it is possible, however, to produce cheap steel with a corrosion resistance comparable to steel 1.4401 or even better, wide spread use of stainless steel as concrete reinforcement should be possible. New types of austenitic and duplex steel as being developed in the Laboratory for metal research of Swiss Federal Institute of Technolog (ΕΤΗ) in Zurich without Ni seem to be promising materials. In this case it is tried to replace expensive components by cheap ones such as nitrogen.

Characteristics of the Structure of Welded Joints in Sanicro 25 Steel

2013 ◽  
Vol 212 ◽  
pp. 71-74 ◽  
Author(s):  
Przemysław Jamrozik ◽  
Maria Sozańska
Keyword(s):  
Mechanical Properties ◽  
Stainless Steel ◽  
Welded Joints ◽  
Structural Elements ◽  
Quality Class ◽  
Welding Technology ◽  
Class B ◽  
Material Studies

Sanicro 25 stainless steel (X7NiCrWCuCoNbNB25-23-3-3-2) is a preferred material for structural elements of boilers with supercritical and ultracritical parameters. Welded joints are critical sites that are vulnerable to failure. Hand-welded and automatically uniform welds of Sanicro 25 are evaluated in material studies, and the structure and basic mechanical properties of welded joints are examined. The proposed welding technology for Sanicro 25 ensures proper microstructure, and has obtained quality class B certification.

scholarly journals Numerical Modelling of Thin-Walled Stainless Steel Structural Elements in Case of Fire

2009 ◽  
Vol 46 (1) ◽  
pp. 91-108 ◽  
Author(s):  
Nuno Lopes ◽  
Paulo Vila Real ◽  
Luís Simões da Silva ◽  
Jean-Marc Franssen
Keyword(s):  
Stainless Steel ◽  
Numerical Modelling ◽  
Structural Elements ◽  
Thin Walled

scholarly journals Repair and Reinforcement of Historic Timber Structures with Stainless Steel—A Review

Metals ◽  
2019 ◽  
Vol 9 (1) ◽  
pp. 106 ◽  
Author(s):  
Marco Corradi ◽  
Adelaja Israel Osofero ◽  
Antonio Borri
Keyword(s):  
Stainless Steel ◽  
Experimental Studies ◽  
Timber Structures ◽  
Structural Elements ◽  
Non Invasive ◽  
Current Trends ◽  
Repair Materials ◽  
Load Carrying ◽  
Historic Structures ◽  
Recent Trends

Recent trends in the use of stainless steel profiles for repair and reinforcement of historic timber structures, after degradation due to biotic and non-biotic attacks, are discussed in this paper. These structural challenges can vary from inadequate load carrying capacity to complexities involved with choice of repair materials and techniques. Given the recurring requirements of conservation authorities in terms of reversibility of interventions and compatibility between historic and new materials, an increase in the use of non-invasive reinforcement materials and reversible techniques was observed. Subsequently, engineers and researchers have increasingly employed stainless steel alloys in retrofitting historic timber structures. This paper therefore presents the state of the art in the use of stainless steel profiles in retrofitting timber structural elements within historic structures. It includes a review of the development of the retrofitting methods and existing experimental studies on the mechanical behavior of timber structures reinforced with stainless steel. Finally, it presents a number of case studies and draws conclusions on current trends and practices based on reported studies.

scholarly journals Image Based Analysis of Complex Microstructures of Engineering Materials

2008 ◽  
Vol 18 (1) ◽  
pp. 33-39 ◽  
Author(s):  
Tomasz Wejrzanowski ◽  
Wojciech Spychalski ◽  
Krzysztof Różniatowski ◽  
Krzysztof Kurzydłowski
Keyword(s):  
Stainless Steel ◽  
Spatial Distribution ◽  
Quantitative Description ◽  
Direct Methods ◽  
Structural Elements ◽  
Service Degradation ◽  
Engineering Materials ◽  
Degradation Of Materials ◽  
Microscopic Techniques

Image Based Analysis of Complex Microstructures of Engineering MaterialsThe paper presents various methods for quantitative description of material structures. The main focus is on direct methods of description based on image analysis. In particular, techniques for the estimation of the size, shape and spatial distribution of structural elements observed by different microscopic techniques are described. The application of these methods for the characterization of the structures of engineering materials is demonstrated on a stainless steel used in petrochemical installations. It is shown that the methods applied are useful for the assessment of service degradation of materials.

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