scholarly journals Finite Element Analyses of Cold‐formed Stainless Steel Beam with Web Openings in Shear

ce/papers ◽  
2019 ◽  
Vol 3 (3-4) ◽  
pp. 907-912
Author(s):  
Ishqy Fareed ◽  
Wanniarachchi Somadasa ◽  
Keerthan Poologanathan ◽  
Shanmuganathan Gunalan ◽  
Marco Corradi ◽  
...  
Keyword(s):  
Finite Element ◽  
Stainless Steel ◽  
Steel Beam ◽  
Finite Element Analyses ◽  
Web Openings

scholarly journals Finite Element Analyses of Cold‐formed Stainless Steel Beams Subject to Shear

ce/papers ◽  
2019 ◽  
Vol 3 (3-4) ◽  
pp. 931-936
Author(s):  
Madhushan Dissanayake ◽  
Keerthan Poologanathan ◽  
Shanmuganathan Gunalan ◽  
Konstantinos Daniel Tsavdaridis ◽  
Brabha Nagaratnam
Keyword(s):  
Finite Element ◽  
Stainless Steel ◽  
Steel Beams ◽  
Finite Element Analyses

Evaluation of Residual Stresses in Small Diameter Stainless Steel Pipe Welds by Two-Dimensional and Three-Dimensional Finite Element Analyses

2014 ◽  
Author(s):  
Francis H. Ku ◽  
Trevor G. Hicks ◽  
William R. Mabe ◽  
Jason R. Miller
Keyword(s):  
Residual Stress ◽  
Finite Element ◽  
Stainless Steel ◽  
Residual Stresses ◽  
Three Dimensional ◽  
Steel Pipe ◽  
3D Analysis ◽  
Two Dimensional ◽  
Finite Element Analyses ◽  
Stainless Steel Pipe

Two-dimensional (2D) and three-dimensional (3D) weld-induced residual stress finite element analyses have been performed for 2-inch Schedule 80 Type-304 stainless steel pipe sections joined by a multi-layer segmented-bead pipe weld. The analyses investigate the similarities and differences between the two modeling approaches in terms of residual stresses and axial shrinkage induced by the pipe weld. The 2D analyses are of axisymmetric behavior and evaluate two different pipe end constraints, namely fixed-fixed and fixed-free, while the 3D analysis approximates the non-axisymmetric segmented welding expected in production, with fixed-free pipe end constraints. Based on the results presented, the following conclusions can be drawn. The welding temperature contour results between the 2D and 3D analyses are very similar. Only the 3D analysis is capable of simulating the non-axisymmetric behavior of the segmented welding technique. The 2D analyses yield similar hoop residual stresses to the 3D analysis, and closely capture the maximum and minimum ID surface hoop residual stresses from the 3D analysis. The primary difference in ID surface residual stresses between the 2D fixed-fixed and 2D fixed-free constraints cases is the higher tensile axial stresses in the pipe outside of the weld region. The 2D analyses under-predict the maximum axial residual stress compared to the 3D analysis. The 2D ID surface residual stress results tend to bound the averaged 3D results. 2D axisymmetric modeling tends to significantly under-predict weld shrinkage. Axial weld shrinkage from 3D modeling is of the same magnitude as values measured in the laboratory on a prototypic mockup.

Prediction of Fatigue Crack Initiation and Growth During Thermal Cycling

2015 ◽  
Author(s):  
Guiyi Wu ◽  
David Smith ◽  
David Tanner
Keyword(s):  
Finite Element ◽  
Stainless Steel ◽  
Crack Initiation ◽  
Thermal Cycling ◽  
Dwell Time ◽  
Thermal Loading ◽  
Fatigue Cracks ◽  
Fatigue Crack Initiation ◽  
Stress And Strain ◽  
Finite Element Analyses

Conventional approaches to assess fatigue under combined thermal and mechanical loading often utilize a fatigue design curve. In this paper models based on the physics and mechanics for the initiation and growth of fatigue cracks in stainless steel are first explained. The models are based on experimental evidence gathered for the initiation and growth of small cracks created during strain controlled laboratory tests. This evidence is then linked with data for the growth of large fatigue cracks in stainless steel. In the paper these models are coupled with finite element analyses to explore the fatigue initiation and growth of cracks in stainless steel pipes subjected to thermal cycling. It is assumed that the material behaviour is elastic-perfectly plastic, rate independent and fatigue occurs in air. The stress and strain fields for pipes subjected to a range of thermal loading conditions are explored. The fields are shown to be sensitive to parameters such as the Biot and Fourier numbers that include pipe dimensions, physical properties, dwell time and thermal conditions. Of particular interest is the temperature range and dwell time during thermal loading. Finite element analyses are then used to determine the stress and strain ranges created by thermal loading and these ranges are used in the crack initiation and growth models to estimate fatigue life.

Geometrical and Welding Conditions on Through-Thickness Residual Stress in Primary Piping of Girth Welded Joints

2008 ◽  
Vol 580-582 ◽  
pp. 573-576 ◽  
Author(s):  
Jinya Katsuyama ◽  
Masahito Mochizuki ◽  
Hiroaki Mori ◽  
W. Asano ◽  
Gyu Baek An ◽  
...  
Keyword(s):  
Residual Stress ◽  
Finite Element ◽  
Stainless Steel ◽  
Stress Corrosion Cracking ◽  
Welded Joints ◽  
Three Dimensional ◽  
Finite Element Analyses ◽  
Welding Zone ◽  
Butt Welding ◽  
Welding Joints

Recently, stress corrosion cracking (SCC) of primary piping of stainless steel has been observed. SCC is considered to initiate and progress at near the welding zone in butt-welded pipes, because of the tensile residual stress introduced by welding. In present work, three-dimensional and axisymmetric thermo-elastic-plastic finite element analyses have been carried out, in order to clarify the effect of geometrical and welding conditions on through-thickness residual stress. In particular, butt-welding joints of SUS316L pipes have been examined. The residual stress was simulated by three-dimensional and axisymmetric models and the results were compared and discussed in detail.

scholarly journals ANALYSIS OF STEEL I-BEAMS WITH RECTANGULAR WEB OPENINGS: EXPERIMENTAL AND FINITE ELEMENT INVESTIGATION

2015 ◽  
Vol 7 (1) ◽  
pp. 13-23 ◽  
Author(s):  
Samadhan G. Morkhade ◽  
Laxmikant M. Gupta
Keyword(s):  
Finite Element ◽  
Aspect Ratio ◽  
Parametric Study ◽  
Steel Beam ◽  
Element Analysis ◽  
Web Openings ◽  
Finite Element Software ◽  
Fillet Radius ◽  
Load Carrying ◽  
The Web

Steel I-shaped beams with web openings of shapes like hexagonal, circular and rectangular at regular intervals have been used since last 60–70 years. Therefore aim of this paper is to examine the behaviour of steel I-beams with rectangular web openings by performinganexperimental and parametric study. A parametric study based on finite element analysis consists of effect of fillet radius, aspect ratio of rectangular openings, stiffeners position around the openings and effect of positions of openings on load carrying capacities of steel beam with rectangular web openings was carried out by using a commercial finite element software ANSYS v.12. An overall study of such type of beam was carried out and results shows that rectangular openings having fillet radius either 2 times thickness of web or 25 mm (whichever is minimum), aspect ratio of 1.6 and reinforcement either in the form of horizontal or vertical stiffeners around the web openings found to be very effective. The fillet radius and stiffeners also affect the stress distribution around the corner regions of openings. Load carrying capacities of perforated beams are almost equal to plain-webbed beams, when openings are placed within middle two-third(neutral zone) of the span.

scholarly journals Numerical study of inelastic buckling behavior of rectangular steel plates with circular openings under shear forces

2019 ◽  
Vol 258 ◽  
pp. 05026
Author(s):  
Rajawali M Akbar ◽  
Bambang Suryoatmono
Keyword(s):  
Finite Element ◽  
Stress Distribution ◽  
Steel Plates ◽  
Steel Beam ◽  
Circular Opening ◽  
Finite Element Analyses ◽  
Shear Forces ◽  
Inelastic Buckling ◽  
Buckling Behavior ◽  
Von Mises

Cellular steel beam is flanged steel beam with circular openings of uniform diameter and distance between each opening. The main benefit of such beam is to reduce the structural weight without reducing the strength significantly. A rectangular steel plate with circular opening is frequently used as a model of a web panel of such beam with vertical web stiffeners. The dimension of the plate is the dimension of the web bounded by top and bottom flanges and two adjacent vertical stiffeners. In this research, finite element method is utilized to perform inelastic buckling analyses of rectangular steel plates with circular openings under shear forces along all four edges assuming steel as elastic-perfectly-plastic material with yield stress of 250 MPa. Both nonlinear geometry and nonlinear material are considered in the analyses. The objective of this research is to study buckling behavior of the plate in terms of buckling mode, critical load, and Von Mises (effective) stress distribution. The buckling shear loads of the plates of various length-to-width ratios of the plate (1.0, 1.25, and 1.50) and various opening-diameter-to-plate-width ratios (0.00, 0.05, 0.10, 0.15, 0.20, 0.25, 0.30, 0.35, 0.40, 0.45, 0.50) have been obtained from the analyses. The deformation and Von Mises stress distribution at every load level have been obtained as well from the finite element analyses. Equation to predict inelastic buckling shear force of a rectangular steel plates with circular opening under shear forces is proposed in this study. Verification of the method has been performed by comparing shear buckling loads resulted from finite element analyses with the analytical results in the elastic range.

scholarly journals Analysis of the Main Aspects Affecting Bonding in Stainless Steel Rebars Embedded in a Hydraulic Medium

Metals ◽  
2021 ◽  
Vol 11 (5) ◽  
pp. 786
Author(s):  
Fernando Ancio ◽  
Esperanza Rodriguez-Mayorga ◽  
Beatriz Hortigon
Keyword(s):  
Finite Element ◽  
Stainless Steel ◽  
Boundary Conditions ◽  
Masonry Structures ◽  
Finite Element Analyses ◽  
Pull Out ◽  
Mathematical Expressions ◽  
Special Circumstances ◽  
Steel Rebars

The use of stainless steel rebars to reinforce masonry structures has become established as an eminently efficient methodology. From among the numerous techniques available, bed-joint structural repointing and superficial reinforcement with rebars or meshes attached to surfaces have become widespread, thanks to the excellent results they have produced in recent decades. Both techniques imply the use of diameters less than 6 mm and thin coverings. This article deals with the characterization of the bonding behavior of the rebar under these special circumstances. To this end, several finite element analyses have been carried out to identify the possible relationships between pull-out forces in various situations. These models allow certain conclusions to be drawn regarding the influence of the thickness of covering, boundary conditions, and geometrical aspects of the rebars in bonding. Certain mathematical expressions that relate the various conclusions from this research are finally laid out.

scholarly journals Experimental and Finite Element Method of Castellated Steel Beam with and without Hexagonal web opening

2019 ◽  
Vol 9 (1S3) ◽  
pp. 421-424
Keyword(s):  
Finite Element ◽  
Primary Objective ◽  
Steel Beams ◽  
Steel Beam ◽  
Load Carrying Capacity ◽  
Ansys Software ◽  
Web Openings ◽  
Web Opening ◽  
Load Carrying ◽  
Castellated Beam

Castellated beams are made from the conventional I section by the process named as Castellation Process. As of late, broad examination on these castellated steel beams has been directed, including various shapes in web openings. The primary objective of these examination works was to assess and dissect its ideal opening sizes and shapes arrangement. For the most part castellated beam are given hexagonal, round and square formed openings. The finite element investigation is most favored technique for comprehension the flexural strength of castellated beams. In this examination, experimental and numerical displaying approach is utilized for deciding spacing between openings on hexagonal castellated beam. ANSYS software was utilized for the investigation. Opening edge 60o with various opening dispersing 0.15d and 0.25d have beam utilized. Investigation was selected steel beam with and without web openings of ISMB 150 and solid ISMB200 section. Results demonstrated that the castellated bar with hexagonal opening indicated more load carrying capacity and less significant deflection contrasted with solid beam.

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