Relevant bibliographies by topics / Ratchetting failure

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

Academic literature on the topic 'Ratchetting failure'

Author: Grafiati
Published: 19 February 2023

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Journal articles on the topic "Ratchetting failure"

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Wang, Ziyi, Xiang Xu, Li Ding, Guozheng Kang, Ping Wang, and Qianhua Kan. "A new damage-coupled cyclic plastic model for whole-life ratchetting of heat-treated U75V steel." International Journal of Damage Mechanics 29, no. 9 (June 9, 2020): 1397–415. http://dx.doi.org/10.1177/1056789520930408.

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In the framework of continuum damage mechanics, a new damage-coupled cyclic plastic model is proposed to describe the nonlinear evolution of whole-life ratchetting and its dependence on the stress level. The characteristic that the damage evolution rate of U75V heat-treated steel decays in the initial load cycles is considered by introducing a modified term into classic damage evolution equation. A hybrid fatigue failure criterion considering both the fatigue and ratchetting strain-induced failures is established based on the fatigue failure rule concluded from experiments. Comparisons between simulated and experimental stress–strain hysteresis loops, ratchetting strains, damage evolutions, and fatigue lives are performed to validate the proposed model.
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Kang, Guo Zheng, Yu Jie Liu, and Qing Gao. "Uniaxial Ratchetting-Fatigue Interaction of Tempered 42CrMo Steel and its Failure Model." Advanced Materials Research 33-37 (March 2008): 115–20. http://dx.doi.org/10.4028/www.scientific.net/amr.33-37.115.

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Uniaxial ratchetting-fatigue interaction of tempered 42CrMo alloy steel was observed by various cyclic stressing tests at room temperature. The ratchetting deformation and low cycle fatigue (LCF) property of the material as well as their interaction occurred in cyclic stressing were discussed. It is shown that progressive ratchetting deformation causes the decrease of fatigue life, and the fatigue life of the material depends greatly upon the applied mean stress, stress amplitude, maximum stress and stress ratio. Since tempered 42CrMo steel presents significant cyclic softening feature, a tertiary ratchetting is observed. Based on the experimental results, a simple and reasonable failure model convenient to engineering application was constructed to predict the fatigue life of the material in uniaxial cyclic stressing. The basic variables of the model are maximum stress and stress ratio, and the effect of cyclic softening feature on the ratcheting-fatigue interaction is also included in the model by introducing a new variable. It is shown that the predicted lives are in fairly good agreement with the experimental ones.
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Lin, J., F. P. E. Dunne, and D. R. Hayhurst. "Approximate method for the analysis of components undergoing ratchetting and failure." Journal of Strain Analysis for Engineering Design 33, no. 1 (January 1, 1998): 55–65. http://dx.doi.org/10.1243/0309324981512814.

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An approximate method has been presented for the design analysis of engineering components subjected to combined cyclic thermal and mechanical loading. The method is based on the discretization of components using multibar modelling which enables the effects of stress redistribution to be included as creep and cyclic plasticity damage evolves. Cycle jumping methods have also been presented which extend previous methods to handle problems in which incremental plastic straining (ratchetting) occurs. Cycle jumping leads to considerable reductions in computer CPU (central processing unit) resources, and this has been shown for a range of loading conditions. The cycle jumping technique has been utilized to analyse the ratchetting behaviour of a multibar structure selected to model geometrical and thermomechanical effects typically encountered in practical design situations. The method has been used to predict the behaviour of a component when subjected to cyclic thermal loading, and the results compared with those obtained from detailed finite element analysis. The method is also used to analyse the same component when subjected to constant mechanical loading, in addition to cyclic thermal loading leading to ratchetting. The important features of the two analyses are then compared. In this way, the multibar modelling is shown to enable the computationally efficient analysis of engineering components.
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Ringsberg, J. W. "Cyclic ratchetting and failure of a pearlitic rail steel." Fatigue Fracture of Engineering Materials and Structures 23, no. 9 (September 2000): 747–58. http://dx.doi.org/10.1046/j.1460-2695.2000.00336.x.

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Tomizawa, Yusuke, Takehito Suzuki, Katsuhiko Sasaki, Ken-Ichi Ohguchi, and Daisuke Echizenya. "Biaxial Ratchetting Deformation of Solders Considering Halt Conditions." Key Engineering Materials 725 (December 2016): 299–304. http://dx.doi.org/10.4028/www.scientific.net/kem.725.299.

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Recently, Halt (Highly accelerated limit test) is widely employed for evaluation of reliability of electronic products. Halt condition is quite severe. The tested products are subjected to mechanical impacts, thermal shock, and vibration at same time. However, there has not been a reasonable and accurate evaluation method for Halt yet. To construct an accurate evaluation method of Halt, basic deformation mechanism of parts of the electronic products should be clarified from both experimental and theoretical points of view. In this paper, focusing on solder joints of circuit boards of electronic products, ratchetting deformation, especially, biaxial ratchetting deformation of solder joints is revealed from both experimentally and theoretically. The authors have already conducted biaxial ratchetting test combining axial and torsional cyclic loading using a tubular specimen of Type 304 stainless steel. However, as for solders, it is difficult to make tubular specimen. Since size of the solder joints is micron, a small size joint specimen of copper tube and solder is employed in this paper. First, to confirm the quality of the joint specimen such as boundary between copper and solder, both the tensile and cyclic loading tests are conducted at several temperatures using Sn-3Ag-0.5Cu. The basic characteristic of tensile and fatigue failure is obtained from these tests. After the confirmation of the accuracy of the joint specimen, biaxial ratchetting tests are conducted superposing the tensile load on cyclic torsion. The biaxial ratchetting tests are conducted using a biaxial loading testing machine developed for the joint specimens of solder and copper.
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LIU, Y., G. KANG, and Q. GAO. "Stress-based fatigue failure models for uniaxial ratchetting–fatigue interaction." International Journal of Fatigue 30, no. 6 (June 2008): 1065–73. http://dx.doi.org/10.1016/j.ijfatigue.2007.08.005.

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Mandal, Nirmal Kumar, and M. Dhanasekar. "Sub-modelling for the ratchetting failure of insulated rail joints." International Journal of Mechanical Sciences 75 (October 2013): 110–22. http://dx.doi.org/10.1016/j.ijmecsci.2013.06.003.

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Liu, Yujie, Guozheng Kang, and Qing Gao. "A multiaxial stress-based fatigue failure model considering ratchetting–fatigue interaction." International Journal of Fatigue 32, no. 4 (April 2010): 678–84. http://dx.doi.org/10.1016/j.ijfatigue.2009.10.006.

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Howell, M. B., C. A. Rubin, and G. T. Hahn. "The Effect of Dent Size on the Pressure Distribution and Failure Location in Dry Point Frictionless Rolling Contacts." Journal of Tribology 126, no. 3 (June 28, 2004): 413–21. http://dx.doi.org/10.1115/1.1692053.

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Finite element simulation is performed for rolling contact over four different size spherical dents. Two rolling contacts are simulated using a portion of a sphere as a counter-face to the dented half-space. The effect of dent size on the pressure distribution and fatigue failure location for dry point contact is studied. The material model used was adjusted to match both the stress amplitude versus strain range curve and ratchetting experimental data for 52100 bearing steel.
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Yahiaoui, K., D. G. Moffat, and D. N. Moreton. "Single frequency seismic loading tests on pressurized branch pipe intersections machined from solid." Journal of Strain Analysis for Engineering Design 28, no. 3 (July 1, 1993): 197–207. http://dx.doi.org/10.1243/03093247v283197.

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Four CNC machined, equal-thickness branch pipe intersections ( dm/ Dm = 1 and 0.746) have been tested under conditions of internal pressure, simulated seismic loading that induced resonant in-plane run pipe bending and, in one case, a superimposed gravity stress. The manufacturing method and testing conditions are described and the behaviour of the branches is reported. The strain responses of the components show that ratchetting is clearly significant while the response moment data suggest that collapse may not be the failure mechanism under these loading conditions. Failure for all components occurred by cracks on the flanks in the branch hoop stress direction just above the junction.
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Dissertations / Theses on the topic "Ratchetting failure"

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(9815870), Nirmal Mandal. "Failure of railhead material of insulated rail joints." Thesis, 2011. https://figshare.com/articles/thesis/Failure_of_railhead_material_of_insulated_rail_joints/13461620.

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"Aim of this research is to examine the impact fatigue failure of the railhead of the IRJ [insulated rail joints] and determine actions that can be taken to prolong IRJ life in the track. Mechanical fatigue and plastic deformation (metal flow) of the railhead in the vicinity of the IRJs are the main aspects considered in the research"--p. 3.
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Book chapters on the topic "Ratchetting failure"

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Hu, W., and C. H. Wang. "Modelling of the cyclic ratchetting and mean stress relaxation behaviour of materials exhibiting transient cyclic softening." In Structural Failure and Plasticity, 723–28. Elsevier, 2000. http://dx.doi.org/10.1016/b978-008043875-7/50245-8.

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"LIMITATIONS OF A KINEMATIC HARDENING MODEL FOR ASSESSING RATCHETTING FAILURES IN PRESSURISED PIPES." In Failures and the Law, 447–54. Routledge, 2003. http://dx.doi.org/10.4324/9780203477021-43.

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Conference papers on the topic "Ratchetting failure"

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Roos, Eberhard, Xaver Schuler, and Ludwig Stumpfrock. "Numerical Evaluation of Ratchetting Effects on the Deformation and Failure Behaviour of Components." In ASME 2009 Pressure Vessels and Piping Conference. ASMEDC, 2009. http://dx.doi.org/10.1115/pvp2009-77245.

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Within a recent project of German reactor safety research an existing phenomenological material model was improved and verified. The material model allows to simulate numerically the complex procedures during multiaxial and cyclic load in a component. The model makes the simulation for in-phase and out-of-phase loads possible. Parallel to the theoretical work experimental investigations were accomplished. With the experimental data on the one hand the parameter necessary for the material model are determined. On the other hand experiments supply a database from thin-walled hollow cylinders with multiaxial load for the verification of the implementation of the material model to a finite element programme. Good coincidence between measured data and simulation could be achieved in most cases. In some cases the simulation overestimates the measured data. With respect to a safety assessment of components, therefore, the simulation gives conservative results.
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Ciavarella, M., and L. Afferrante. "On Ratchetting-Based Models of Wear and Rolling Contact Fatigue (RCF)." In STLE/ASME 2003 International Joint Tribology Conference. ASMEDC, 2003. http://dx.doi.org/10.1115/2003-trib-0285.

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Recent efforts to develop simple unified models of both wear and RCF (Kapoor & Franklin, 2000, Franklin et al., 2001) are discussed, in view of previous theoretical and experimental results on ratchetting in rolling contact. At sufficiently high contact pressures, surfaces deform plastically with unidirectional cumulation of “ratchetting” strains (Johnson, 1985, Ch.9). However, the modelling of ratchetting strains as a function of plastic material properties has turned out more complicated than what originally suggested by the first attempts (Merwin & Johnson, 1963), as recently discussed by Ponter et al. (2003). Wear due to surface ratchetting occurs for sufficiently high friction, whereas RCF is mainly due to ratchetting subsurface. It appears that experimental data on ratchetting strains in the literature unfortunately do not show a clear and unique trend, and various proposed fitting equations differ significantly in quantitative and qualitative terms, particularly at large number of cycles. It is shown that ratchetting in rolling contact is a combination of “structural ratchetting” (that modelled with the perfect plasticity model) and “material ratchetting”, and the latter is very sensitive to the hardening behaviour of the material. Also, the surface and subsurface flow regimes are very different: in pure rolling, a simplified model of the stress cycle condition is a fully reversed cycle of shear superposed to an out-of-phase pulsating compression in a extended region below the surface (neglecting other two components also of pulsating compression); increasing the friction coefficient, a mean shear stress is induced as well as a tensile component in the direct stress, and for friction f > 0.3 the maximum moves at the surface, but the highly stressed zone becomes a thin surface layer which suffers uniquely of “material ratchetting”. In the limit of very high friction, we have the critical condition on the surface which obviously gives a pulsating shear stress cycle in phase with a pulsating compression, but in addition we have a nearly fully reversed cycle of tension-compression (although the tensile peak is very localized also in the longitudinal direction). Such multiaxial stress fields and their largely different features introduced cause a response of the material which has not been studied enough, perhaps both in terms of ratchetting rates and in terms of the failure condition. In particular, the ductility for ratchetting surface flow as used in wear models seems apparently much higher than that for RCF ratchetting models. Also, RCF at large number of cycles in the C&S experiments (Clayton & Su, 1996, Su & Clayton, 1997) seems not well correlated with shakedown theory, and accordingly, simple ratchetting equations based on excess of shakedown such as that of Tyfoor et al (1996), do not seem well suited a Wohler SN life curve. However, these conclusions are only very qualitative as the materials in the two tests are different, and at present empirical separate models for wear and RCF based on hardness of materials and a posteriori data fitting seem the only quantitative way forward for engineering purposes.
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Yang, X. J., C. L. Chow, and K. J. Lau. "A Unified Viscoplastic Fatigue Damage Model for 63Sn-37Pb Solder Alloy Under Cyclic Stress Control." In ASME 2002 International Mechanical Engineering Congress and Exposition. ASMEDC, 2002. http://dx.doi.org/10.1115/imece2002-32862.

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A damage coupling viscoplastic model is developed to predict fatigue life of solder alloy 63Sn-37Pb under stress control. The viscoplastic flow rule chosen employs a hyperbolic sine function. A damage evolution equation is formulated based on three distinct material deformation behaviors: (i) stress rate independent damage evolution; (ii) stress rate dependent cyclic damage evolution; and (iii) stress rate dependent ductile damage evolution. The cyclic stress testing with different stress waveforms was first conducted to investigate their progressive viscoplastic deformations of the solder alloy. The investigation reveals that the material constants used in the model can be adequately determined from the results of standard creep tests. The constitutive model is validated by comparing the predicted and measured ratchetting results of the solder alloy under different forms of stress cycling. The proposed model is found to be capable of satisfactorily describing the viscoplastic deformation and ratchetting failure behaviors of the solder alloy under the conditions of the cyclic stress loading.
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Abdalla, Hany F., Maher Y. A. Younan, and Mohammad M. Megahed. "Shakedown Analysis of a Cylindrical Vessel-Nozzle Intersection Subjected to Steady Internal Pressures and Cyclic Out-of-Plane Bending Moments." In ASME 2012 Pressure Vessels and Piping Conference. American Society of Mechanical Engineers, 2012. http://dx.doi.org/10.1115/pvp2012-78674.

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In the current research, the shakedown limit loads of a cylindrical vessel–nozzle intersection are determined via a simplified technique. The cylindrical vessel–nozzle intersection is subjected to a spectrum of steady internal pressure magnitudes and cyclic out–of–plane bending moments on the nozzle. The determined shakedown limit loads, forming the shakedown boundary, are utilized to generate the Bree diagram of the cylindrical vessel–nozzle intersection. In addition to the determined shakedown boundary, the Bree diagram includes the maximum moment carrying capacity (limit moments) and the elastic limit loads. The currently generated Bree diagram is compared with previously generated Bree diagram of the same structure, but subjected to in–plane bending. Noticeable differences regarding the magnitudes of the generated shakedown boundaries are observed. Moreover, only failure due to reversed plasticity response occurs upon exceeding the generated shakedown boundary unlike cyclic in–plane bending where the structure experienced both reversed plasticity and ratchetting failure responses. The simplified technique outcomes showed excellent correlation with the results of full elastic–plastic cyclic loading finite element simulations.
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Sollogoub, Pierre. "The OECD-NEA Programme on Metallic Component Margins Under High Seismic Loads (MECOS): Towards New Criteria." In ASME 2017 Pressure Vessels and Piping Conference. American Society of Mechanical Engineers, 2017. http://dx.doi.org/10.1115/pvp2017-65516.

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MECOS is a Post-Fukushima OECD/NEA initiative, with the following main objectives: • To quantify the existing margins in seismic analysis of safety class components and assess the existing design practices within a benchmark activity. • To make proposals for new design/evaluation criteria of pressurized piping systems, accounting for their actual failure mode under strong input motions. The first part of MECOS consisted of gathering information on i) current design practices and ii) dynamic seismic tests on piping system carried out around the world that could be suitable for benchmarking. Part 2 is a benchmark exercise on piping system tests, and Part 3 are proposals for new criteria. The purpose of the proposed paper is to introduce the work which is undertaken in Part 3 in order to propose design criteria that address the observed fatigue-ratchetting failure modes as well as plastic instability. It includes revisiting the past test results as well as the interpretations that were carried out and conclusions that were drawn at that time, and reanalyzing them in the light of recent developments. Recent experimental programs carried out in Japan and in India will also be addressed.
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Chen, Haofeng, A. R. S. Ponter, and R. A. Ainsworth. "The Application of the Linear Matching Method to the Life Assessment Method R5: A Comparison." In ASME 2005 Pressure Vessels and Piping Conference. ASMEDC, 2005. http://dx.doi.org/10.1115/pvp2005-71603.

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The Life Assessment Method R5 is widely used for the assessment of power plant at high temperatures. The procedure involves the application of a sequence of rules that provide margins of safety against a range of possible failure modes, plastic collapse, ratchetting, fatigue failure, creep rupture and creep/fatigue interaction. Within R5 this is achieved by using limit load and shakedown methods, combined with Neuber’s rule and the evaluation of elastic follow-up factors. In recent years, the Linear Matching Method has been developed so that it is capable of providing optimal solutions for each of these criteria, thereby giving less conservative margins of safety, but adopting the same use of material data as R5. The paper describes a detailed comparison between the approach currently used in R5 and the result of the application of the Linear Matching Method, for the entire range of failure modes and for a simple example. The purpose of this comparison is to assess the circumstances where Linear Matching Methods may have a distinct advantage over current methods. The example consists of a square plate containing a circular hole. The plate is subjected to uniaxial loading and a radial varying temperature field. For all failure modes the Linear Matching Method gives less conservative results compared with standard R5 methods. The differences can be very significant, particularly for the prediction of strength limits; limit load, shakedown load and ratchet limit. Significantly lower and less conservation elastic follow-up factors were also obtained. The comparison demonstrates the advantages of the Linear Matching Method in this context.
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Vorster, Willem J. J., Jonathan Roy, Daniel G. Gilroy, Jack A. Pollock, David M. Clarkson, Andrew J. Beveridge, and Alistair Strong. "Assessment of Safety Valve Escape Pipework." In ASME 2022 Pressure Vessels & Piping Conference. American Society of Mechanical Engineers, 2022. http://dx.doi.org/10.1115/pvp2022-84858.

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Abstract This paper discusses fitness for purpose (FfP) structural integrity assessments of Safety Relief valve (SRV) vent pipes that were inadequately designed and maintained. The FfP assessments identified several latent errors with the pipework design. The absence of a fault schedule in combination with the latent errors led to a discernable anomaly in the safety case which was finally address but resulted in long outage delays and spiraling costs due to the large number of assessments, inspections and modifications required to achieve and demonstrate integrity. The FfP assessments discussed here consider all failure mechanisms which were identified as being relevant during steam discharge. These include plastic collapse, ratchetting, creep rupture and creep-fatigue and required a series of complex assessments to sentence the SRV pipes for return to service. The Computational Fluid Dynamics (CFD), pipe stress analysis and Finite Element Modeling (FEM) required to demonstrate integrity are discussed. The plant modification and repair solutions required to achieve integrity before the pipes could be returned to service are presented. The method used to apply CFD loads to pipe stress models without double accounting for static pressure stresses in the Finite Element Analyses (FEA), is describe here. Novel analysis techniques used to speed up assessments and the historic plant data reviews that were required to substantiate the claims on historic damage are reviewed.
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