| 1. |
- Mackerle, Jaroslav, 1942-
(författare)
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Finite elements in the analysis of pressure vessels and piping, an addendum: A bibliography (2001-2004) : in International Journal of Pressure Vessels and Piping(ISSN 0308-0161), vol 82, issue 7, pp 571-592
- 2005
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Ingår i: International Journal of Pressure Vessels and Piping. - : Elsevier BV. - 0308-0161 .- 1879-3541. ; 82:7, s. 571-592
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Tidskriftsartikel (övrigt vetenskapligt/konstnärligt)abstract
- The paper gives a bibliographical review of finite element methods(FEMs) applied for the analysis of pressure vessel structures/components and piping from the theoretical as well as practical points of view. This bibliography is a new addendum to the Finite elements in the analysis of pressure vessels and piping - a bibliography [1-3]. The listings at the end of the paper contain 856 references to papers and conference proceedings on the subject that were published in 2001-2004. These are classified in the following categories: linear and nonlinear, static and dynamic, stress and deflection analyses, stability problems, thermal problems, fracture mechanics problems, contact problems, fluid-structure interaction problems, manufacturing of pipes and tubes, welded pipes and pressure vessel components, development of special finite elements for pressure vessels and pipes, finite element software, and other topics.
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| 2. |
- Andersson, Henrik C. M., et al.
(författare)
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Creep crack growth in service-exposed weld metal of 2.25Cr1Mo
- 2001
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Ingår i: International Journal of Pressure Vessels and Piping. - 0308-0161 .- 1879-3541. ; 78:11-12, s. 749-755
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Tidskriftsartikel (refereegranskat)abstract
- Creep crack growth (CCG) has been studied for ex-service weld metal of 2.25Cr1Mo (P22). The testing was conducted at a temperature of 550degreesC and prior to testing, the material had been exposed to high temperature service for 110 000 h at 530 C. The results show a marked effect of the service exposure on the CCG properties of the material when compared to similar testing performed on a new material. The CCG rate was higher by a factor 3.1 in the service-exposed material, which should be compared to the model value of 3.2 based on the relations between the elongation values. The consumed deformation capacity was also estimated with the omega model for tertiary creep. In this case, an enhanced growth rate of 2.4 was obtained. Within a distance of about 10 mm in front of the propagating cracks, the number of creep cavities was significantly higher than in the surrounding material. The variation of the density of cavities as a function of distance from the crack tip was successfully modelled. (C) 2002 Published by Elsevier Science Ltd.
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| 3. |
- Brickstad, B., et al.
(författare)
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Procedures used in Sweden for safety assessment of components with cracks
- 2000
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Ingår i: International Journal of Pressure Vessels and Piping. - 0308-0161 .- 1879-3541. ; 77:14-15, s. 877-881
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Tidskriftsartikel (refereegranskat)abstract
- The paper introduces a handbook for safety assessment of components with cracks. The handbook is intended for situations when defects are found during inspection of components and gives estimations of the risk of failure as well as the expected growth of the defect due to fatigue or stress corrosion during the evaluation interval. The handbook is easy to use and contains all necessary information needed. A Windows based PC-program is also available with a graphic module to present results in an efficient manner. Improvements are introduced for the handling of secondary stresses. In addition, a new safety evaluation system is included.
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| 4. |
- Mackerle, Jaroslav
(författare)
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Creep and creep fracture/damage finite element modelling of engineering materials and structures - A bibliography (1980-1999)
- 2000
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Ingår i: International Journal of Pressure Vessels and Piping. - : Elservier. - 0308-0161 .- 1879-3541. ; 77:1, s. 53-77
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Tidskriftsartikel (refereegranskat)abstract
- The paper gives a bibliographical review of the finite element methods (FEMs) applied to the creep and creep fracture/damage of engineering materials and structures from the theoretical as well as practical points of view. The added bibliography at the end of the paper contains 964 references to papers, conference proceedings and theses/dissertations on the subject that were published between 1980-1999. These are classified in the following categories: materials, topics, and areas of applications. Each of this category is further divided into specific subcategories for a more effective and faster reference retrieval. (C) 2000 Elsevier Science Ltd. All rights reserved.
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| 5. |
- Mackerle, Jaroslav
(författare)
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Finite element analysis of fastening and joining : A bibliography (1990-2002)
- 2003
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Ingår i: International Journal of Pressure Vessels and Piping. - 0308-0161 .- 1879-3541. ; 80:4, s. 253-271
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Tidskriftsartikel (refereegranskat)abstract
- The paper gives a bibliographical review of finite element methods applied for the analysis of fastening and joining from the theoretical as well as practical points of view. The bibliography at the end of the paper contains 726 references to papers and conference proceedings on the subject that were published between 1990 and 2002. These are classified in the following categories: Pin joints, thread connections, bolted joints, screws, nuts, rivets, fittings, tubular joints, expansion joints, gaskets, and other types of fastening. © 2003 Elsevier Science Ltd. All rights reserved.
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| 6. |
- Mackerle, Jaroslav
(författare)
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Finite elements in the analysis of pressure vessels and piping, an addendum : A bibliography (1998-2001)
- 2002
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Ingår i: International Journal of Pressure Vessels and Piping. - 0308-0161 .- 1879-3541. ; 79:1
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Tidskriftsartikel (refereegranskat)abstract
- The paper gives a bibliographical review of finite element methods (FEMs) applied for the analysis of pressure vessel structures/ components and piping from the theoretical as well as practical points of view. This bibliography is an addendum to the Finite elements in the analysis of pressure vessels and piping - a bibliography (1976-1996) published [Int J Press Vess Piping 69 (1996) 279] and Finite elements in the analysis of pressure vessels and piping, an addendum (1996-1998) published [Int J Press Vess Piping 76 (1999) 461]. The new bibliography at the end of the paper contains approximately 670 references to papers and conference proceedings on the subject that were published in 1998-2001. These are classified in the following categories: linear and nonlinear, static and dynamic, stress and deflection analyses, stability problems, thermal problems, fracture mechanics problems, contact problems, fluid-structure interaction problems, manufacturing of pipes and tubes, welded pipes and pressure vessel components, development of special finite elements for pressure vessels and pipes, finite element software, and other topics. © 2002 Elsevier Science Ltd. All rights reserved.
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| 7. |
- Anderson, Patrick
(författare)
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Concentration of plastic strains in steel liners due to concrete cracks in the containment wall
- 2008
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Ingår i: International Journal of Pressure Vessels and Piping. - : Elsevier BV. - 1879-3541 .- 0308-0161. ; 85:10, s. 711-719
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Tidskriftsartikel (refereegranskat)abstract
- A substantial part of nuclear containments in US and Europe are designed with an outer bearing concrete structure and an inner sealing consisting of a tight-welded steel liner. The liner constitutes the ultimate leak-barrier, which prevents leakage at high internal pressure loads. The purpose of this paper is to show which influence a through-wall concrete crack may have on the strain level in the liner. A non-linear bar model is used to evaluate the liner behavior. It is shown that the effect from friction between the concrete and liner could be significant and cause high concentration of plastic strain. The influence of friction on the liner is verified by an experimental program presented in this paper. One of the conclusions is that concentrations of strain due to friction increase with decreasing liner thickness. This is important to consider when results from scale tests are interpreted. Scale models, which have thinner liners, could get significantly higher liner strain than the actual full-scale containment. (c) 2008 Elsevier Ltd. All rights reserved.
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| 8. |
- Barsoum, IImad, et al.
(författare)
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A procedure to determine the tangential true stress-strain behavior of pipes
- 2015
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Ingår i: International Journal of Pressure Vessels and Piping. - : Elsevier BV. - 0308-0161 .- 1879-3541. ; 128, s. 59-68
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Tidskriftsartikel (refereegranskat)abstract
- Determining the tangential mechanical properties of a tube is essential for simulation of various manufacturing processes that involve the use of a tubular geometry. The aim of this study is to develop a procedure to determine the tangential true stress-strain behavior of pipes. For this purpose a modified ring test setup is proposed consisting of a ring specimen loaded with two separate D-blocks. Using a finite element model, an optimized ring specimen geometry is obtained. The optimized ring specimen exhibits uniform tangential distribution in the gauge region of the specimen and necking occurs consistently at the center of the gauge length. It is found that friction has a substantial effect on the mechanical response of the ring test for which two different setups to reduce friction are proposed. One using lubricated D-blocks (DB) and one using lubricated D-blocks with needle roller bearing (RB). Assisted by the FE model, the friction during the experiment is account for and a data analysis procedure to determine the tangential stress-strain curve of the pipe is proposed. It is found that the results using this procedure show very good agreement with previously published results.
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| 9. |
- Barsoum, Imad, et al.
(författare)
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Collapse analysis of a large plastic pipe using cohesive zone modelling technique
- 2020
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Ingår i: International Journal of Pressure Vessels and Piping. - : Elsevier BV. - 0308-0161 .- 1879-3541. ; 187
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Tidskriftsartikel (refereegranskat)abstract
- Polypropylene (PP) plastic pipes have recently gained widespread application in non-pressurized gravity pipes used for seawater intake lines in the petrochemical industry. These pipes consist of a solid wall base pipe, on which an outer reinforcement called the omega-profile is spirally winded and hot fusion bonded. The omega-profile is usually filled with grout to provide on-bottom stability for subsea installation. It is of high importance that the bond between the omega-profile and the base pipe has sufficient strength to provide resistance against buckling of the pipeline system. The objective of this study is to investigate the collapse behaviour of such large-diameter PP pipes subjected to a negative internal pressure. The bond is modelled with cohesive zone modelling technique with the aim to determine the failure mode that governs the collapse behaviour of the pipe, e.g. buckling or delamination. Experiments where conducted on single cantilever beam (SCB) specimens cut from the pipe to determine the cohesive bond strength between the omega-profile and base pipe. The findings from the experiments are implemented in a full pipe model, where the surface between the omega-profile and base pipe is assigned bond strength characteristics in accordance with the experimental results. The FEA results of the nonlinear collapse analysis of the full pipe model show that for the range of grout stiffness values considered (0 <= E- (g) <= 30 GPa), the governing failure mode of the pipe is initiated by buckling and proceeded by delamination. For delamination to govern the failure mode, a grout stiffness greater than 36 GPa in combination with a weaker bond strength than the experimentally measured would be required. The methodology presented in this study gives a rather accurate tool for the design and analysis of this type of structures, and can reliably assess the bond strength level required in view of the governing failure modes, e.g. buckling and delamination.
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| 10. |
- Broman, Göran, et al.
(författare)
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Determining Dynamic Characteristics of Bellows by Manipulated Beam Finite Elements of Commercial Software
- 2000
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Ingår i: International Journal of Pressure Vessels and Piping. - Oxford : Elsevier Science. - 0308-0161 .- 1879-3541. ; 77:8, s. 445-453
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Tidskriftsartikel (refereegranskat)abstract
- A procedure for determining dynamic characteristics of bellows by manipulating certain parameters of the beam finite elements of I-DEAS Master Series 6 is presented. The method will work in any software in which these parameters can be set by the user. Compared to a shell elements model the model size is reduced by at least a factor of 100. This is especially advantageous when the bellows is only a part of a system to be optimised with respect to overall design parameters. Stress in the bellows cannot be predicted by this method, but when the dynamic behaviour is known it can be used as input for stress calculations, if desired. In contrast to existing "semi-analytical" methods this method has the potential of considering axial, bending and torsion degrees of freedom simultaneously, and it facilitates the interaction between the bellows and the rest of the system, also modelled by beam or shell finite elements. The procedure is verified by experimental results from other investigators.
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