Relevant bibliographies by topics / Materials Welded joints Finite element method

Contents

  1. Journal articles
  2. Dissertations / Theses
  3. Books
  4. Book chapters
  5. Conference papers

Academic literature on the topic 'Materials Welded joints Finite element method'

Author: Grafiati
Published: 4 June 2021
Last updated: 6 February 2022

Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles

Select a source type:

Consult the lists of relevant articles, books, theses, conference reports, and other scholarly sources on the topic 'Materials Welded joints Finite element method.'

Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.

You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.

Journal articles on the topic "Materials Welded joints Finite element method"

1

AbuShanab, Waheed, and Essam Moustafa. "Detection of Friction Stir Welding Defects of AA1060 Aluminum Alloy Using Specific Damping Capacity." Materials 11, no. 12 (November 30, 2018): 2437. http://dx.doi.org/10.3390/ma11122437.

Full text
Abstract:
The demand for nondestructive testing has increased, especially in welding testing. In the current study, AA1060 aluminum plates were jointed using the friction stir welding (FSW) process. The fabricated joints were subjected to free vibration impact testing in order to investigate the dynamic properties of the welded joint. Damping capacity and dynamic modulus were used in the new prediction method to detect FSW defects. The data acquired were processed and analyzed using a dynamic pulse analyzer lab shop and ME’Scope’s post-processing software, respectively. A finite element analysis using ANSYS software was conducted on different types of designed defects to predict the natural frequency. The results revealed that defective welded joints significantly affect the specific damping capacity. As the damping ratio increased, so did the indication of opportunities to increase the presence of defects. The finite element simulation model was consistent with experimental work. It was therefore revealed that natural frequency was insufficient to predict smaller defects.
APA, Harvard, Vancouver, ISO, and other styles
2

Konjatić, Pejo, Dražan Kozak, and Nenad Gubeljak. "The Influence of the Weld Width on Fracture Behaviour of the Heterogeneous Welded Joint." Key Engineering Materials 488-489 (September 2011): 367–70. http://dx.doi.org/10.4028/www.scientific.net/kem.488-489.367.

Full text
Abstract:
Since welded constructions are widely used in engineering, a certain flaws in welded joints may occur either in process of welding or in exploitation period. Easiest way to prolong working life of such welded construction is to repair welded joint to eliminate possibility of construction failure. Process of repair welding usually gives heterogeneous welded joints because during process of repair additional material is introduced into welded joint, resulting in heterogeneity from the presence of materials in welded joint point of view. Such difference in materials usually results in yield strength difference between materials, represented with mismatch ratio, and it is commonly present in welds where high strength low-alloyed (HSLA) steels were welded. Since I butt welded joints are very common in welding, a systematic investigation of such welds is performed and presented in this paper. Therefore in this investigation the influence of present material in heterogeneous weld and geometry of weld is investigated in context of fracture resistance of welded joint represented as yield load solutions in the first place. A flaw in form of crack was implemented in such heterogeneous weld and using finite element method yield load solutions for different combinations of weld geometry and material strength are obtained and presented in form of diagrams.
APA, Harvard, Vancouver, ISO, and other styles
3

Reddy Vempati, Srinivasa, K. Brahma Raju, and K. Venkata Subbaiah. "Simulation of Ti-6Al-4V cruciform welded joints subjected to fatigue load using XFEM." Journal of Mechanical Engineering and Sciences 13, no. 3 (September 27, 2019): 5371–89. http://dx.doi.org/10.15282/jmes.13.3.2019.11.0437.

Full text
Abstract:
The stress distribution of cruciform shape welded joints is analyzed by finite element codes ABAQUS. Welded joints with various weld shapes and sizes are investigated to estimate the fatigue life of different joints. The fatigue behavior is evaluated under constant amplitude loading (R=0.1). The aim of this work is fatigue behavior evaluation of fillet welded cruciform joint for different weld geometry. The weld geometry are considered: concave, convex and flat weld shape of different weld sizes. The stress intensity factor (SIF) of a TI 6AL4V, is calculated by using Extended finite element method (XFEM) in ABAQUS software. Simulations of fatigue life for different weld shapes at different stresses are analyzed and crack initiations are identified the number of severe fatigue life cycles which are obtained are very close to the theoretical values. In present study the importance of XEFM method is recognized to predict the crack growth rate for convex specimen which is subjected maximum fatigue stress.
APA, Harvard, Vancouver, ISO, and other styles
4

Shiraiwa, Takayuki, Fabien Briffod, and Manabu Enoki. "Fatigue Life Prediction of Welded Joint by Microstructure-based Simulation." MATEC Web of Conferences 269 (2019): 03005. http://dx.doi.org/10.1051/matecconf/201926903005.

Full text
Abstract:
This paper proposes a numerical framework to predict fatigue life on welded joints by integrating several computational techniques. The framework consists of five steps: i) materials properties estimation; ii) welding simulation using thermo-mechanical finite element method; iii) macroscopic stress field analysis under cyclic loading; iv) mesoscopic stress field analysis using crystal plasticity finite element method (CPFEM); v) analysis of fatigue crack growth. The total number of cycles to failure is eventually obtained by the sum of initiation life calculated by CPFEM and propagation life calculated by X-FEM. A fatigue life of butt joint is evaluated by the proposed method. The results demonstrated the possibility of evaluating the fatigue life and its scattering by the proposed framework.
APA, Harvard, Vancouver, ISO, and other styles
5

Corigliano, Pasqualino. "Non-linear finite element analysis of a Ti6Al4V/Inconel 625 joint obtained by explosion welding for sub-sea applications." Underwater Technology 38, no. 1 (March 30, 2021): 13–16. http://dx.doi.org/10.3723/ut.38.013.

Full text
Abstract:
Industries have shown interest in the use of dissimilar metals to make corrosion-resistant materials combined with good mechanical properties in marine environments. Explosive welding can be considered a good method for joining dissimilar materials to prevent galvanic corrosion. The aim of the present study was to simulate the non-linear behaviour of a Ti6Al4V/Inconel 625 welded joint obtained by explosion welding from the values of the tensile ultimate strength and yielding strength of the parent materials. The present study compared the stress-strain curve from tensile loading obtained by the non-linear finite element analysis with the experimental stress-strain curve of a bimetallic joint. The applied method provides useful information for the development of models and the prediction of the structural behaviour of Ti6Al4V/Inconel 625 explosive welded joints.
APA, Harvard, Vancouver, ISO, and other styles
6

Xu, Di, and Xiang Ling. "Numerical Simulation of Residual Stress in the Glass-to-Metal Diffusion Seals." Materials Science Forum 575-578 (April 2008): 666–71. http://dx.doi.org/10.4028/www.scientific.net/msf.575-578.666.

Full text
Abstract:
The glass-to-metal seals are widely used in the solar thermal power. When a glass-to-metal seal is cooled in the process of diffusion welding, the residual stresses are generated due to different thermal contraction between the two materials. The residual stresses built up along the interface near the end of the seal can induce welded joints to crack and decrease the fatigue intensity of the welded joints and thus are of technical importance. In order to obtain the residual stresses existed in the diffusion welded joints, the glass-to-metal vacuum diffusion sealing process were simulated by using finite element software ABAQUS. Furthermore, the influences of temperature, time, vacuum, and seal pressure on the strength of the glass-to-metal diffusion welding were analyzed. The optimization of the diffusion welding process parameter based on the simulation of the residual stress and analysis of the micro-structure and the macro-mechanical performance of the diffusion welded seals was carried out. The distribution of residual stress on the surface of the glass-to-metal joint caused by welding is measured by X-ray diffraction method, and compared with the result of the numerical simulation to prove the validation of the finite element model.
APA, Harvard, Vancouver, ISO, and other styles
7

Xue, He, Yueqi Bi, Shuai Wang, Jianlong Zhang, and Siyu Gou. "Compilation and Application of UMAT for Mechanical Properties of Heterogeneous Metal Welded Joints in Nuclear Power Materials." Advances in Materials Science and Engineering 2019 (November 22, 2019): 1–12. http://dx.doi.org/10.1155/2019/3151823.

Full text
Abstract:
For the problem of mechanical properties of heterogeneous dissimilar metal welded joints, when analyzed by the finite element method, it is usually simplified into a “sandwich” material structure model. However, the mechanical properties of materials in different regions of the “sandwich” material mechanics model are different, and there will be mutations at the material interface. In order to accurately describe the mechanical properties of welded joints, the constitutive equations of dissimilar metal welded joint materials were compiled, and the constitutive equations of inhomogeneous materials whose material mechanical properties were continuously changed with space coordinates were established. The ABAQUS software was used to establish the “sandwich” model and the continuous transition model. The model is used to compare and analyze the crack tip stress distribution of different yield strength mismatch coefficients. The results show that the continuous transition material model eliminates the mutation of the “sandwich” model at the material interface and achieves the continuous change of the mechanical properties of the material. For the longitudinal crack, under the influence of different mismatch coefficients, the crack tip stress field of the transitional material model is deflected toward the low yield strength side. The compilation of constitutive equations for continuous transition materials of dissimilar metal welded joints provides a basis for the safety evaluation of dissimilar metal welded joints.
APA, Harvard, Vancouver, ISO, and other styles
8

Yousefi, Armin, Ahmad Serjouei, Reza Hedayati, and Mahdi Bodaghi. "Fatigue Modeling and Numerical Analysis of Re-Filling Probe Hole of Friction Stir Spot Welded Joints in Aluminum Alloys." Materials 14, no. 9 (April 23, 2021): 2171. http://dx.doi.org/10.3390/ma14092171.

Full text
Abstract:
In the present study, the fatigue behavior and tensile strength of A6061-T4 aluminum alloy, joined by friction stir spot welding (FSSW), are numerically investigated. The 3D finite element model (FEM) is used to analyze the FSSW joint by means of Abaqus software. The tensile strength is determined for FSSW joints with both a probe hole and a refilled probe hole. In order to calculate the fatigue life of FSSW joints, the hysteresis loop is first determined, and then the plastic strain amplitude is calculated. Finally, by using the Coffin-Manson equation, fatigue life is predicted. The results were verified against available experimental data from other literature, and a good agreement was observed between the FEM results and experimental data. The results showed that the joint’s tensile strength without a probe hole (refilled hole) is higher than the joint with a probe hole. Therefore, re-filling the probe hole is an effective method for structures jointed by FSSW subjected to a static load. The fatigue strength of the joint with a re-filled probe hole was nearly the same as the structure with a probe hole at low applied loads. Additionally, at a high applied load, the fatigue strength of joints with a refilled probe hole was slightly lower than the joint with a probe hole.
APA, Harvard, Vancouver, ISO, and other styles
9

Mochizuki, M., M. Hayashi, and T. Hattori. "Residual Stress Analysis by Simplified Inherent Strain at Welded Pipe Junctures in a Pressure Vessel." Journal of Pressure Vessel Technology 121, no. 4 (November 1, 1999): 353–57. http://dx.doi.org/10.1115/1.2883714.

Full text
Abstract:
We present a new and simplified method of estimating residual stress in welded structures by using inherent strain. The method makes use of elastic analysis by means of the finite element method and is used to calculate the residual stress in complicated three-dimensional structures efficiently. The inherent strain distribution in a welded joint of a small-diameter pipe penetrating a pressure vessel was assumed to be a simple distribution, and the residual stress was calculated. Inherent strain distributions were inferred from those of welded joints with simple shapes. The estimated residual stress using these inferred inherent strains agrees well with the measurements of a mock-up specimen. The proposed method is a simple way to estimate welding residual stress in three-dimensional structures of complicated shapes.
APA, Harvard, Vancouver, ISO, and other styles
10

Sedmak, Simon A., Aleksandar Sedmak, Aleksandar Grbović, and Zoran Radaković. "Integrity and Life Assessment of Welded Joints Made of Micro-Alloyed High Strength Steels." Advanced Materials Research 1157 (February 2020): 161–67. http://dx.doi.org/10.4028/www.scientific.net/amr.1157.161.

Full text
Abstract:
Structural integrity and life of welded joints made of a micro-alloyed low-carbon fine-grained normalised high strength pressure vessel steel, P460NL1 is presented [1]. The researach performed within the scope of this topic involved a large number of experiments, including tensile and bending tests, hardness and toughness, as well as metallography and fractography tests, in order to determine the mechanical properties of the materials and the welded joints in detail, along with their microstructures and their influence on the obtained test results. Specimens cut out of a welded plate with dimensions of 500x500x14 mm were used for the experiments, whereas certain tests required the making of notches in the specimens, inside the heat affected zone, and this welded joint region was the focus of the research. Fatigue experimental tests were based on the assumption that fatigue crack growth rate changes depending on the regions through which the crack passed during its propagation. For this purpose, specimens used in toughness and fatigue tests were divided into four groups, depending on the part of the plate from which they were taken. Numerical calculations were performed using the extended finite element method (XFEM) [2]. Simulations were based on the experimentally determined values of Paris law coefficients, C i m [3-5], for every region through which the crack propagated during each test. Obtained results have indicated good agreement with the experimental ones, which verified the application of extended finite element method in this case.
APA, Harvard, Vancouver, ISO, and other styles
More sources

Dissertations / Theses on the topic "Materials Welded joints Finite element method"

1

Grove, Alewyn Petrus. "Development of a finite element based nominal stress extraction procedure for fatigue analysis of welded structures." Diss., University of Pretoria, 2006. http://upetd.up.ac.za/thesis/available/etd-12182007-125836/.

Full text
APA, Harvard, Vancouver, ISO, and other styles
2

RABELLO, EMERSON G. "Uma nova proposta para inclusão dos efeitos da perda de restrição à plasticidade na caracterização do comportamento à fratura de aços ferríticos." reponame:Repositório Institucional do IPEN, 2005. http://repositorio.ipen.br:8080/xmlui/handle/123456789/11266.

Full text
Abstract:
Made available in DSpace on 2014-10-09T12:50:05Z (GMT). No. of bitstreams: 0
Made available in DSpace on 2014-10-09T14:03:39Z (GMT). No. of bitstreams: 1 10453.pdf: 10469479 bytes, checksum: d3c93a6b8b4f37c1c27b6a416cb89a59 (MD5)
Tese (Doutoramento)
IPEN/T
Instituto de Pesquisas Energeticas e Nucleares - IPEN/CNEN-SP
APA, Harvard, Vancouver, ISO, and other styles
3

Doering, Kenneth Thomas Nathaniel. "Fatigue of friction stir welded lap joints with sealants." Diss., Rolla, Mo. : Missouri University of Science and Technology, 2009. http://scholarsmine.mst.edu/thesis/pdf/Doering_09007dcc80627994.pdf.

Full text
Abstract:
Thesis (M.S.)--Missouri University of Science and Technology, 2009.
Vita. The entire thesis text is included in file. Title from title screen of thesis/dissertation PDF file (viewed April 9, 2009) Includes bibliographical references (p. 118-127).
APA, Harvard, Vancouver, ISO, and other styles
4

Mahdavi, Shahri Meysam. "Fatigue Assessment of Friction Stir Welded Joints in Aluminium Profiles." Doctoral thesis, KTH, Materialteknologi, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-92157.

Full text
Abstract:
Friction stir welding (FSW) is a low heat input solid state welding technology. It is often used for fabrication of aluminium alloys in transportation applications including railway, shipbuilding, bridge structures and automotive components. In these applications the material is frequently subject to varying load conditions and fatigue failure is a critical issue. In most cases standard codes and fatigue guidelines for aluminium welded joints address only welded structures with conventional welding methods but not those with FSW procedure. In the scope of this thesis fatigue life assessment of friction stir welded components was performed using theoretical approaches along with finite element method (FEM). The further aim of this study was to generate a basis for standardization of fatigue assessment of friction stir welded joints. Friction stir welded hollow aluminium panels of alloy 6005A are investigated. The panels are used for train wall sides, train floors, deck and bridges. Each panel is made of several profiles that are joined with the friction stir welding method. Fatigue bending tests were performed for profiles in these panels. Fatigue cracks and failure appeared at notches in the profiles. With FEM simulations critical positions for crack initiation and failure were identified. The method of critical distance was used to analyse and estimate the fatigue life. It was shown that the failure location and fatigue limit could be predicted for both base metal and weld location. Choice of welding procedure (clamping condition) can significantly influence the fatigue life. It was shown that for some panels the critical distance method was not able to explain the failure in the weld. In this case fracture mechanics together with residual stress analysis were used successfully to predict the failure. Assuming homogeneous material properties throughout the weld and the base material, FEM analysis for T and overlap joints as well can provide a reasonable fatigue prediction. This suggests that the same assumption can be extended to complex components for failure analysis of the friction stir welded joints when using the critical distance method. Fatigue assessment of friction stir welded joints was also performed using standard codes Eurocode 9 and IIW. Fatigue curves of traditional fusion welded joints were used. The results are in reasonable agreement with experimental data and FEM predictions.
QC 20120330
APA, Harvard, Vancouver, ISO, and other styles
5

Long, Xin. "Finite element analysis of residual stress generation during spot welding and its affect on fatigue behavior of spot welded joints." Diss., Columbia, Mo. : University of Missouri-Columbia, 2005. http://hdl.handle.net/10355/4171.

Full text
Abstract:
Thesis (Ph. D.)--University of Missouri-Columbia, 2005.
The entire dissertation/thesis text is included in the research.pdf file; the official abstract appears in the short.pdf file (which also appears in the research.pdf); a non-technical general description, or public abstract, appears in the public.pdf file. Title from title screen of research.pdf file viewed on (November 13, 2006) Vita. Includes bibliographical references.
APA, Harvard, Vancouver, ISO, and other styles
6

Romo, Arango Sebastian A. "Low-Cycle Fatigue of Low-Alloy Steel Welded Joints." The Ohio State University, 2019. http://rave.ohiolink.edu/etdc/view?acc_num=osu1573054310351145.

Full text
APA, Harvard, Vancouver, ISO, and other styles
7

Srinivasan, Shiva. "Characterization of stresses induced in doweled joints due to thermal and impact loads." Morgantown, W. Va. : [West Virginia University Libraries], 2001. http://etd.wvu.edu/templates/showETD.cfm?recnum=2186.

Full text
Abstract:
Thesis (M.S.)--West Virginia University, 2001.
Title from document title page. Document formatted into pages; contains x, 114 p. : ill. (some col.). Includes abstract. Includes bibliographical references (p. 108-113).
APA, Harvard, Vancouver, ISO, and other styles
8

Nyström, Martin, and Tainan Pantano Tomaz. "Fatigue analysis of welded joints in a forestry machine : Utilizing the notch stress concept." Thesis, Linnéuniversitetet, Institutionen för maskinteknik (MT), 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:lnu:diva-45003.

Full text
Abstract:
Welding is one of the most applied technics in the world for joining steel. Welds are liable to the phenomenon of fatigue, which is, primarily, the formation of a crack and consequently reduction of strength due to the action of time varying loads. Fatigue is one of the main causes of failure in steel structures. The aim of this thesis is to do static and dynamic analyses of a forestry crane with the purpose of using the analyses to determine the lifetime due to fatigue of welded components. Two methods for fatigue assessment are used in this work, the Hot-Spot Method and the Notch Stress Method. The first boom, which is a key component for the crane, is analyzed in a Finite Element Method (FEM) software. The found principal stress in accordance with the notch stress method in the first boom is ±165 MPa for the analyzed load case, rendering in a stress range of 330 MPa. The fatigue strength class FAT-225 (m=3), leads to an expected number of 633000 cycles, with a probability of survival of 97,7% for this case.
Svetsning är en av de vanligaste teknikerna för sammanfogning av stål. Svetsar är känsliga för utmattning. Utmattningsfenomenet består primärt av en initial dislokation som genom tidsvarierande belastning formar en spricka som växer och därmed reducerar styrkan i konstruktionen. Utmattning är en av de vanligaste orsakerna till skador i stålkonstruktioner. Målet med detta arbete är att genomföra både statiska och dynamiska analyser av en skogsmaskins kran i avseende att bestämma utmattningslivslängden för dess svetsade konstruktioner. Två metoder för utvärdering används i detta arbete, hot-spot-metoden och notch-stress-metoden. Kranens första bom (lyftarmen) som är en huvudkomponent i kranen analyseras med hjälp av ett Finita Element program i enlighet med notch-metoden. Högsta funna spänningsvariationen i första huvudspänningsriktningen var ±165 MPa för ett av de analyserade lastfallen. Utmattningsklass FAT 225 (m=3) ger en uppskattning om utmattningslivslängd på 633000 cykler med en sannolikhet för överlevnad på 97.7% i detta fall.
APA, Harvard, Vancouver, ISO, and other styles
9

Roy, Samit. "A finite element analysis of adhesively bonded composite joints including geometric nonlinearity, nonlinear viscoelasticity, moisture diffusion and delayed failure." Diss., Virginia Polytechnic Institute and State University, 1987. http://hdl.handle.net/10919/88624.

Full text
Abstract:
A two-dimensional finite-element computational procedure is developed for the accurate analysis of the strains and stresses in adhesively bonded joints. The large displacements and rotations experienced by the adherends and the adhesive are taken into account by invoking the updated Lagrangian description of motion. The adhesive layer is modeled using Schapery's nonlinear single integral constitutive law for uniaxial and multiaxial states of stress. Effect of temperature and stress level on the viscoelastic response is taken into account by a nonlinear shift factor definition. Penetrant sorption is accounted for by a nonlinear Fickean diffusion model in which the diffusion coefficient is dependent on the penetrant concentration and the dilatational strain. A delayed failure criterion based on the Reiner-Weisenberg failure theory has also been implemented in the finite element code. The applicability of the proposed models is demonstrated by several numerical examples.
Doctor of Philosophy
APA, Harvard, Vancouver, ISO, and other styles
10

Källgren, Therese. "Investigation and modelling of friction stir welded copper canisters." Doctoral thesis, KTH, Materialvetenskap, 2010. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-11999.

Full text
Abstract:
This work has been focused on characterisation of FSW joints, and modelling of the process, both analytically and numerically. The Swedish model for final deposit of nuclear fuel waste is based on copper canisters as a corrosion barrier with an inner pressure holding insert of cast iron. Friction Stir Welding (FSW) is the method to seal the copper canister, a technique invented by The Welding Institute (TWI). The first simulations were based on Rosenthal’s analytical medium plate model. The model is simple to use, but has limitations. Finite element models (FEM) were developed, initially with a two-dimensional geometry. Due to the requirements of describing both the heat flow and the tool movement, three-dimensional models were developed. These models take into account heat transfer, material flow, and continuum mechanics. The geometries of the models are based on the simulation experiments carried out at TWI and at Swedish Nuclear Fuel Waste and Management Co (SKB). Temperature distribution, material flow and their effects on the thermal expansion were predicted for a full-scale canister and lid. The steady state solutions have been compared with temperature measurements, showing good agreement. In order to understand the material flow during welding a marker technique is used, which involves inserting dissimilar material into the weld zone before joining. Different materials are tested showing that brass rods are the most suitable material in these welds. After welding, the weld line is sliced, etched and examined by optical microscope. To understand the material flow further, and in the future predict the flow, a FEM is developed. This model and the etched samples are compared showing similar features. Furthermore, by using this model the area that is recrystallised can be predicted. The predicted area and the grain size and hardness profile agree well. Microstructure and hardness profiles have been investigated by optical microscopy, Scanning Electron Microscopy (SEM), Electron Back Scatter Diffraction (EBSD) and Rockwell hardness measurements. EBSD visualisation has been used to determine the grain size distribution and the appearance of twins and misorientation within grains. The orientation maps show a fine uniform equiaxed grain structure. The root of the weld exhibits the smallest grains and many annealing twins. The appearance of the nugget and the grain size depends on the position of the weld. A large difference can be seen both in hardness and grain size between the start of the weld and when the steady state is reached.
QC20100719
APA, Harvard, Vancouver, ISO, and other styles
More sources

Books on the topic "Materials Welded joints Finite element method"

1

Pang, H. L. J. Stress analysis relating to a fillet welded joint with cracks using the Abaqus finite element method program. East Kilbride: National Engineering Laboratory, 1990.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
2

Kanitkar, Ravindra V. Numerical investigation of typical rectangular welded tubular T and DT-joints. 1993.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
3

C, Newman J., and Langley Research Center, eds. Methodology for predicting the onset of widespread fatigue damage in lap-splice joints. Hampton, Va: National Aeronautics and Space Administration, Langley Research Center, 1998.

Find full text
APA, Harvard, Vancouver, ISO, and other styles

Book chapters on the topic "Materials Welded joints Finite element method"

1

Katsareas, Dimitrios Elias, and Anastasius Youtsos. "Residual Stress Prediction in Dissimilar Metal Weld Pipe Joints Using the Finite Element Method." In Materials Science Forum, 53–61. Stafa: Trans Tech Publications Ltd., 2005. http://dx.doi.org/10.4028/0-87849-969-5.53.

Full text
APA, Harvard, Vancouver, ISO, and other styles
2

Raja, T., P. Anand, M. Sundarraj, M. Karthick, and A. Kannappan. "Thermo Mechanical Analysis of Multipass Butt-Welded Joints by Finite Element Method." In Lecture Notes in Mechanical Engineering, 153–64. Singapore: Springer Singapore, 2020. http://dx.doi.org/10.1007/978-981-15-3631-1_15.

Full text
APA, Harvard, Vancouver, ISO, and other styles

Conference papers on the topic "Materials Welded joints Finite element method"

1

Armentani, Enrico, Renato Esposito, and Raffaele Sepe. "Finite Element Analysis of Residual Stresses on Butt Welded Joints." In ASME 8th Biennial Conference on Engineering Systems Design and Analysis. ASMEDC, 2006. http://dx.doi.org/10.1115/esda2006-95125.

Full text
Abstract:
Localized heating during welding, followed by rapid cooling, usually generates residual stresses in the weld and in the base metal. Residual stresses in welding processes give significant problems in the accurate manufacture of structures because those stresses heavily induce the formation of cracks in the fusion zone in high strength steels. Therefore, estimating the magnitude and distribution of welding residual stresses and characterizing the effects of certain welding conditions on the residual stresses are deemed necessary. In this work, residual stresses and distortions on butt welded joints are numerically evaluated by means of finite element method. The FE analysis allows to highlight and evaluate the stress field and his gradient around the fusion zone of welded joints, higher than any other located in the surrounding area. Temperature-dependent material properties, welding velocity, external mechanism constraints, technique of ‘element birth and death’ and latent heat of fusion are also taken into account. Some numerical results are compared with experimental data showing a very good correlation.
APA, Harvard, Vancouver, ISO, and other styles
2

Venkata, Kiranmayi Abburi, and Christopher E. Truman. "Finite Element Simulation of Laser Welding in a P91 Steel Plate." In ASME 2013 Pressure Vessels and Piping Conference. American Society of Mechanical Engineers, 2013. http://dx.doi.org/10.1115/pvp2013-97339.

Full text
Abstract:
New methods for joining materials used in advanced nuclear power plants are of interest to increase the efficiency and productivity. Optimised joints require narrow heat affected zones, low residual stress, strain and distortion. This requires research into a large range of aspects including the nature of the joining processes, characterisation of the joint materials and the integrity of joints in manufacture and service. Of particular interest is the laser welding of the P91 steel used extensively in the power plants. The objective of this paper is to fully characterise the laser welding process using numerical modelling techniques and compare the measured residual stresses for P91 steel welds induced by the welding process with the predicted residual stresses by numerical simulation. The FE simulation consists of thermal analysis and a sequentially coupled structural analysis. Solid state phase transformation is included in the analysis to account for the volumetric changes due to martensitic transformation during cooling. The neutron diffraction technique is used to measure the residual stresses in the welded plate. The measurements are compared with the simulation results and the characteristics of the residual stress distribution and the influence of phase transformations are discussed.
APA, Harvard, Vancouver, ISO, and other styles
3

Yu, Qiming, Weiguo Wu, and Jin Gan. "CTOD Fracture Toughness Tests and Numerical Simulation for Welded Joints of Q370qE." In ASME 2009 28th International Conference on Ocean, Offshore and Arctic Engineering. ASMEDC, 2009. http://dx.doi.org/10.1115/omae2009-79858.

Full text
Abstract:
In this investigation, Based on BS7448 fracture toughness test experiment standard and DNV-OS-C401, three-point crack tip open displacement (CTOD) bending tests were made using Q370qE base steel, weld seam and heat-affected zone (HAZ) samples at different sample thicknesses and at different temperature to study the elasto-plastic fracture toughness of the materials frequently used in ocean engineering structure, and the results were calculated using the p-V curves. The results show that different CTOD values corresponding to the occurrence of brittle fracture before yield strength, brittle fracture after yield strength, and ductile fracture are related to different material types, thicknesses, temperature; and the CTOD value is made up of elastic part and plastic part, the value of plastic part greatly influence the CTOD value. Finally, using ANSYS commercial software, bending test models all of base steel, welded joint, HAZ with various center through crack sizes were computed by three-dimensional finite element method, from the results of the finite element analysis, the simulated p-V curve was obtained. It could be found that the simulated curve was close with the experimental curves, so the finite element analysis was accurate. And these works also have important project practical value to the ocean engineering structure designer.
APA, Harvard, Vancouver, ISO, and other styles
4

Ryu, Ho-Wan, Hune-Tae Kim, Hyun-Woo Jung, and Yun-Jae Kim. "Application of Stress-Modified Fracture Strain Model to Full-Scale Pipes With a Circumferential Crack in the Center of Welds." In ASME 2016 Pressure Vessels and Piping Conference. American Society of Mechanical Engineers, 2016. http://dx.doi.org/10.1115/pvp2016-63546.

Full text
Abstract:
A lot of welded joints are required to connect the junctions of components in the complex piping system. The structural integrity assessment on welded pipes is especially important, because the weldments are susceptible to material discontinuities, flaws and residual stresses. Finite element (FE) damage analysis can be useful and effective method for an accurate assessment on extensive structures. For the case of welded joint, the numerical method is necessarily required to assess complex features because of material discontinuities and flaws. This study provides a simple numerical method to simulate ductile tearing in welded full-scale pipes. Stress-modified fracture strain model is applied to finite element analysis with a stress reduction technique. An element-size-dependent critical damage model is also implemented in the full-scale pipe simulations. From the results of simulation, deformation response and characteristic loads are compared with experimentally measured values to verify the application of damage model on weld material. As a result, the predictions of finite element damage analysis are in good agreement with experiments.
APA, Harvard, Vancouver, ISO, and other styles
5

Chen, Zhong-An, Yuan-qing He, Poh-Sang Lam, Yuh J. Chao, and X. S. Jin. "Effects of Multiple Factors on Crack Tip Constraint in Weld Joints and the Prediction of Weld Fracture Toughness." In ASME 2013 Pressure Vessels and Piping Conference. American Society of Mechanical Engineers, 2013. http://dx.doi.org/10.1115/pvp2013-97260.

Full text
Abstract:
For assessing the safety of welded structural components, it is necessary to investigate the effects of multiple factors, which include the component geometry, load level, weld width, and weld strength mismatch, etc., on the crack tip constraint in weld joints, especially at high level of loading. Based on the J-A2 two-parameter fracture theory, a welding constraint parameter, A2w, is introduced such that the total constraint A2 is the sum of A2w and a geometry constraint A2g. The parameter A2w is developed to quantify the effects of material strength mismatch ratio and weld width, and is used to establish a dual constraint-parameters method (J-A2g-A2w) for characterizing the crack tip stress field in a welded joint. This method is validated by the finite element method (FEM), and the effects of material mismatch and weld width are analyzed. Using a critical crack opening stress as the fracture criterion, the fracture toughness of a welded joint can be predicted from the known fracture toughness value of another welded joint. The procedure and examples are given in this paper.
APA, Harvard, Vancouver, ISO, and other styles
6

Netto, Theodoro A., Marcelo Igor Lourenc¸o, and Adriana Botto. "Fatigue Performance of Reeled Risers." In ASME 2004 23rd International Conference on Offshore Mechanics and Arctic Engineering. ASMEDC, 2004. http://dx.doi.org/10.1115/omae2004-51426.

Full text
Abstract:
One of the most effective installation methods of metallic risers is the reel-lay process, in which pipe segments are welded onshore and subsequently bent over a cylindrical rigid surface (reel) in a laying vessel. During installation, the line is unreeled, straightened, and then laid into the sea under tension. In this process, material properties change and eventual weld defects may increase, thus reducing the fatigue life of these joints under operational loads. Therefore, welded joints must be manufactured based on strict weld acceptance criteria. These criteria shall guarantee reliable standards regarding the fatigue life of the joints while not impairing the feasibility of weld manufacture (high cost). In this work, the reeling process is initially simulated through a nonlinear finite element model that incorporates weld defects. The results are then used as guidelines to experimentally obtain fracture mechanics parameters of typical weld and base materials under prestrained conditions. The fatigue life of as-welded and reeled joints with different defects (lack of fusion and lack of penetration) are subsequently estimated via a finite element model that accounts for the changes in the material properties due to pre-straining. The results are compared and used to suggest guidelines to the design of reeled steel catenary risers.
APA, Harvard, Vancouver, ISO, and other styles
7

Ayrault, Danie`le, Alix Bonaventure, Olivier Asserin, Guillaume Montay, and Vincent Klosek. "Numerical and Experimental Evaluation of Residual Stresses in Dissimilar Weld Joints." In ASME 2011 Pressure Vessels and Piping Conference. ASMEDC, 2011. http://dx.doi.org/10.1115/pvp2011-57523.

Full text
Abstract:
This paper describes finite element modelling of residual stresses in tubular dissimilar weld joints. To validate numerical approach, residual stresses are determined experimentally in various locations of the welded specimen by using complementary methods such as neutron diffraction technique and increment hole drilling method combined to speckle interferometry. Dissimilar metal weld specimens (DMW), representative of configurations in primary coolant circuit of pressurized water nuclear reactors, are produced using AISI 316L stainless steel and low alloy carbon 16MND5 steel as base materials and a nickel based filler metal (Inconel 82) for buttering of the ferritic side and the filling between the buttered pipe and stainless steel one. The simulation of the manufacturing procedure of the DMW specimen is firstly performed thanks to an equivalent heat source. Secondly, the mechanical behaviour is calculated by using the computed thermo-metallurgical history for each welded pass. The “birth and death” elements method is used to simulate the addition of filler metal for this multi-pass welding configuration. A relatively good agreement is observed between the calculated and experimental results.
APA, Harvard, Vancouver, ISO, and other styles
8

Ma, Gang, and Xiang Ling. "Effect of Ultrasonic Impact Treatment on the Stress Corrosion Cracking of 304 Stainless Steel Welded Joints." In ASME 2008 Pressure Vessels and Piping Conference. ASMEDC, 2008. http://dx.doi.org/10.1115/pvp2008-61079.

Full text
Abstract:
High tensile weld residual stress is an important factor contributing to stress corrosion cracking (SCC). Ultrasonic impact treatment (UIT) can produce compressive stresses on the surface of welded joints that negate the tensile stresses to enhance the SCC resistance of welded joints. In the present work, X-ray diffraction method was used to obtain the distribution of residual stress induced by UIT. The results showed that UIT could cause a large compressive residual stress up to 325.9MPa on the surface of the material. A 3D finite element model was established to simulate the UIT process by using a finite element software ABAQUS. The residual stress distribution of the AISI 304 stainless steel induced by UIT was predicted by finite element analysis. In order to demonstrate the improvement of the SCC resistance of the welded joints, the specimens were immersed in boiling 42% magnesium chloride solution during SCC testing, and untreated specimen cracked after immersion for 23 hours. In contrast, treated specimens with different coverage were tested for 1000 hours without visible stress corrosion cracks. The microstructure observation results revealed that a hardened layer was formed on the surface and the initial coarse-grained structure in the surface was refined into ultrafine grains. The above results indicate that UIT is an effective approach for protecting weldments against SCC.
APA, Harvard, Vancouver, ISO, and other styles
9

Li, Lijun, and Lingyu Sun. "Failure Mechanisms of Weld Bonded Lap Joints Between Composite/Metal Adherends." In ASME 2014 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2014. http://dx.doi.org/10.1115/imece2014-37333.

Full text
Abstract:
Weld-bonding, a combination of spot welding and adhesive bonding, is a primary method of joining the composite underbody to the steel body-in-white (BIW). This concept is provided by the Automotive Composites Consortium (ACC) to ensure the compatibility with the OEM assembly processes. This paper established the finite element model of the weld bonded lap joint based on the published specimen dimensions, and compared the ultimate load and failure mode with their experimental results. Their good agreements demonstrated the accuracy of the numerical model and simulation method. Using this model, the progressive failures within the joints were predicted under static tensile loading and impact loading, respectively. The impact resistant capability of this joint was evaluated and the load transfer path among the adhesives, welded spot, composite and HSS adherend was discussed. The influences of relative thickness and relative stiffness between the adhesives and the two adherends on the failure modes were studied numerically, and the map chart for failure mode prediction was provided for weld bonded lap joints of bi-materials adherends, which is helpful for engineering application.
APA, Harvard, Vancouver, ISO, and other styles
10

Nuruzzaman, Md, Christine Q. Wu, and Olanrewaju Ojo. "Modeling of Welding Joint Using Effective Notch Stress Approach for Misalignment Analysis." In ASME 2015 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2015. http://dx.doi.org/10.1115/imece2015-51717.

Full text
Abstract:
This research represents the methodology to develop a weld model to assess the structural integrity of welded joints based on stress analysis by finite element method (FEM) and experimental validation. The stress distribution in the welded joints mainly depends on geometry, loading type and material properties. So, it is a great challenge to develop a weld model to predict the behavior of stress distribution and weld stiffness in the joints. In this study, the effective notch stress approach has been used for weld joint modeling. Parameter tuning has been done for the lowest experimental validation error. The effective notch radius is the only tuning parameter in this weld model. The weld model with effective notch radius in between 0.1 to 0.2 mm has shown a good agreement with the experimental results. Through this study, the weld model based on effect notch stress has been validated experimentally for the first time. The validated weld model was then used for misalignment analysis. Both experimental and FE results confirmed that axial misalignment of 20% of specimen’s thickness would have increased maximum principle stresses more than 25–30%.
APA, Harvard, Vancouver, ISO, and other styles
You might also be interested in the extended bibliographies on the topic 'Materials Welded joints Finite element method' for particular source types:
Journal articles Dissertations / Theses
We offer discounts on all premium plans for authors whose works are included in thematic literature selections. Contact us to get a unique promo code!

To the bibliography