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Auswahl der wissenschaftlichen Literatur zum Thema „Loading cycle asymmetry“
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Zeitschriftenartikel zum Thema "Loading cycle asymmetry"
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Artym, V. I., O. Y. Faflei, V. F. Pents und A. M. Kariuk. „FEATURES OF DURABILITY CALCULATION FOR MACHINE PARTS AND STRUCTURAL ELEMENTS UNDER HIGH ASYMMETRIC LOW-AMPLITUDE LOAD CONDITIONS“. ACADEMIC JOURNAL Series: Industrial Machine Building, Civil Engineering 1, Nr. 50 (11.04.2018): 14–24. http://dx.doi.org/10.26906/znp.2018.50.1090.
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The study has been conducted by means of physical, mathematical and computer modeling integrated method use. To prove the adequacy of the results obtained the experimental procedure on the existing equipment and laboratory facilities has been applied. The method of carrying out asymmetric stress cycles with mean stress of stretching to symmetric using the proposed piecewise – linear equations for evaluating the material sensitivity to asymmetry of the cycle has also been improved. It has enabled pipe column element durability under the condition of typical asymmetric low-amplitude loading calculation.
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Vĕchet, Stanislav, Jan Kohout, Klára Hanzlíková und Vojtěch Hruby. „The Influence of Mean Stress on Fatigue Properties of ADI“. Materials Science Forum 567-568 (Dezember 2007): 341–44. http://dx.doi.org/10.4028/www.scientific.net/msf.567-568.341.
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The paper presents the results of research focused on assessment of the influence of loading cycle asymmetry on fatigue limit values. For tests two heats of unalloyed nodular cast iron were used. Test bars made of keel blocks were heat treated in salt bathes (austenitization at 900 °C during 1 hour, isothermal transformation at 380 and 400 °C) and loaded at symmetrical, repeating and pulsating loading cycles at room temperature. Evaluation of fatigue properties was based on the determination of S-N curves in high-cycle region including the fatigue limit assessment for 107 cycles to fracture. Fatigue and static tests were completed by metallographic and quantitative phase analysis. Most important result obtained from the presented study is that the dependence of stress amplitude on mean stress cannot be approached by the linear relation but by general power law with exponent lower than 1 (i.e. the Haigh diagram has convex shape).
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Nový, František, Juraj Belan und Otakar Bokůvka. „Safety of Construction Components in a Very High Number of Load Cycles“. System Safety: Human - Technical Facility - Environment 2, Nr. 1 (01.03.2020): 199–206. http://dx.doi.org/10.2478/czoto-2020-0024.
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AbstractProgressive, high-strength materials have an important position in the transport industry. In this industry, components are subject to high safety and reliability requirements because they often operate under long-term cyclic stress regimes. The paper presents results of fatigue resistance of high-strength materials such DOMEX 700MC, HARDOX 400, HARDOX 450, and INCONEL 718 (UTS from 850 to 1560 MPa) measured at high-frequency cyclic loading (f = 20 kHz, T = 20 ± 5 ° C, push-pull loading, cycle asymmetry parameter of R = -1) in the area from N = 2x106 to N = 2x108 cycles. Fatigue resistance showed a continuous decrease about average value Sa 2x108/Sa 2x106 = 19.1%.
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Viet, Nguyen Van, Wael Zaki und Ziad Moumni. „A model for shape memory alloy beams accounting for tensile compressive asymmetry“. Journal of Intelligent Material Systems and Structures 30, Nr. 18-19 (22.09.2019): 2697–715. http://dx.doi.org/10.1177/1045389x19873407.
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A new analytical model is derived for cantilever beams made from superelastic shape memory alloy and subjected to tip load. The deformation of the beam is described based on Timoshenko beam theory using constitutive relations that account for asymmetric shape memory alloy response in tension and compression. Analytical moment and shear force equations are developed and the position of the neutral axis and the different solid phase regions in the beam are tracked throughout a full loading–unloading cycle. Validation of the proposed model is carried out against data from the literature and from the finite element analysis considering tensile–compressive asymmetry in shape memory alloy behavior.
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Chen, Yan Hua, und Qing Jie Zhu. „Numerical Simulation of Interfacial Bonding Degradation of Composites under Two-Stage Loading“. Materials Science Forum 575-578 (April 2008): 869–74. http://dx.doi.org/10.4028/www.scientific.net/msf.575-578.869.
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Bonding degradation at interface is one of main damage forms of composites, especially under fatigue loading. Interfacial bonding degradation of FRC under two-stage tension loading is studied, which is base for variable-amplitude cyclic loading existing widely in actual engineering. Based on the shear-lag model and considered the asymmetry of interfacial damage, the mechanical governing equations of fiber and matrix are established and related solutions are obtained firstly. Two kinds of loading models are chosen, one is low-high alternate loading, and the other is low early and high late loading. By the aid of the Paris law and the energy release theory, a relationship between debond rate and cycle number is established. Then the interfacial debonding is simulated under the two-stage tension loading. The rules of the crack growth are analyzed for low-high two-stage loadings. It is found that stress amplitude has great influence on interfacial debonding under two-stage loading. Low stress amplitude in a certain range can postpone interfacial bonding degradation. And interfacial damage extent is greater than that under constant-amplitude fatigue loading. Present study is helpful for analyzing the fatigue damage of engineering materials and structures.
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Rubtsov, Igor, Ramidin Alisultanov, Alexander Zinatullin und Nikolay Midrigan. „Detection of fatigue damage in long-span reinforced concrete structures“. MATEC Web of Conferences 196 (2018): 03010. http://dx.doi.org/10.1051/matecconf/201819603010.
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The emergency situations and catastrophes with buildings and structures may be caused by both the short-time loads considerably exceeding the design load values and the cyclic loads exciting the fatigue damage in the structure material. The cyclic influence is characterized by the amplitude, the cycle asymmetry and the number of loading cycles. To reveal all the factors of a cyclic influence is possible by the on-line measurement of stresses or that of strains at the structure under observation.
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Yu Solovyov, L., und A. L. Solovyov. „The effect of asymmetry of the loading cycle on heat dissipation in metal structures“. IOP Conference Series: Materials Science and Engineering 760 (07.02.2020): 012055. http://dx.doi.org/10.1088/1757-899x/760/1/012055.
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Jambor, Michal, František Nový, Otakar Bokůvka, Libor Trško und Monika Oravcová. „Influence of structure sensitising of the AlSi 316Ti austenitic stainless steel on the ultra-high cycle fatigue properties“. MATEC Web of Conferences 157 (2018): 05011. http://dx.doi.org/10.1051/matecconf/201815705011.
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Austenitic stainless steels are the wide-spread materials, used mainly in the power industry. In that kind of engineering application, structural parts of rotating elements reach during their lifetime very high numbers of loading cycles, exceeding 107 numbers of cycles. With regard to this fact, the data of ultra-high cycle fatigue properties are needed to be used in the qualified design. Increasing demands on the efficiency cause the increase of the operating temperature, and exposition of these materials to the elevated temperatures can cause some important structural changes, which result in the sensitising of the structure. In this study authors present their own experimental results about fatigue properties of AISI 316Ti austenitic stainless steel after sensitising, in the ultra-high cycle region (Nf = 106 ~ Nf = 3×109 cycles). Fatigue tests were carried out using ultrasonic fatigue testing device with frequency f = 20 kHz at the coefficient of cycle asymmetry R = -1, and temperature T = 20±5°C. In the ultra-high cycle region was observed the continuous decrease of the fatigue properties of the AISI 316Ti, and there was recorded the negative effect of the sensitising on the ultra-high cycle fatigue properties of the AISI 316Ti.
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Roşca, Valcu, und Cosmin Mihai Miriţoiu. „The NASGRO Method - Comparison Model for the Crack Growth Rate Calculus“. Applied Mechanics and Materials 880 (März 2018): 53–62. http://dx.doi.org/10.4028/www.scientific.net/amm.880.53.
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The products materials failure process subjected to a time variable loading can be watched and controlled through the study of an important parameter from the “Fracture Mechanics” given by the crack growth rate or the cracking rate. This is marked with da/dN, sometimes da/dt, representing the length variation a at a fatigue loading cycle. From the most used models for its study, one can remember: methods that use the American standards ASTM, Paris formula model or the Walker one. The model called NASGRO or FNK is used to study the crack growth evolution in NASA studies, being a more complex method, for the cracking process. The results obtained were compared to the ones determined with the above methods. For the tests, steel samples R520 were used, CT type, with side notch. The loading cycle was made with the asymmetry coefficient R= 0.5, at the temperatures: 293K, 252K and 213K.
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Kofto, D. G. „Effect of loading frequency and cycle asymmetry on the fatigue resistance of alloy AMg, 6N“. Strength of Materials 22, Nr. 2 (Februar 1990): 283–89. http://dx.doi.org/10.1007/bf00773252.
Der volle Inhalt der QuelleDissertationen zum Thema "Loading cycle asymmetry"
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Kander, Jan. „Kinetika šíření únavových trhlin v ocelích P91 a P92“. Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2021. http://www.nusl.cz/ntk/nusl-442745.
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The main subject of this master’s thesis was to evalute inluence of loading cycle asymmetry and long-term thermal exposure on fatigue crack growth rate in martensitic P91 and P92 steels. Experiments were carried out in Material and metallurgical research Ostrava Ltd. and their main aim was to study the influences of different loading cycle asymmetries (R = 0,1 and R = 0,6) as well as 5000 hours/600 °C (P91) respectively 5000 hours/650 °C (P92) of thermal exposure on fatigue crack growth rate.
Konferenzberichte zum Thema "Loading cycle asymmetry"
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Muratov, R. H., und M. A. Kornilova. „The Method of Accounting for Loading Cycle Asymmetry in Cyclic Durability Analysis“. In ASME Turbo Expo 2009: Power for Land, Sea, and Air. ASMEDC, 2009. http://dx.doi.org/10.1115/gt2009-59070.
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The proposed method has been demonstrated on the universal slopes equation (Manson 1965) and the modified universal slopes equation (Muralidharan & Manson 1998). New equations take into account independence of the transient strain range from the cycle average stress, define more precisely the impact of the cycle average stress upon the durability, take into account the impact of cycle average strain plastic constituent upon the durability. The resulted equations have been validated with finite element analyses of non-notched samples and full-scale parts, for which the results of cyclic tests in the conditions of asymmetric loading are available. The analyses have been performed employing an elastic-plastic approach using cyclic strain curves taken from original durability equations. The use of new equations ensured a good match between design and experimental durability values. Also, the new equations were used to plot Smith, Hay and Wo¨hler diagrams for low, mean and high durability. The resulted analytical diagrams represent a high quality illustration of the experimental diagrams found in the publications. The presented approach to the accounting for cycle average stress and strain will also apply when using experimental cyclic durability curves specific for the material.
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Muratov, R. H. „The Method of Accounting for Loading Cycle Asymmetry in Gas Turbine Engine Components’ Cyclic Durability Analysis“. In ASME Turbo Expo 2006: Power for Land, Sea, and Air. ASMEDC, 2006. http://dx.doi.org/10.1115/gt2006-90884.
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The proposed method has been demonstrated on the universal slopes equation (Manson 1965) and the modified universal slopes equation (Muralidharan & Manson 1998). New equations take into account independence of the transient strain range from the cycle mean stress, define more precisely the impact of the cycle mean stress upon the durability, take into account the impact of cycle mean strain plastic component upon the durability. The resulted equations have been validated with finite element analyses of smooth samples and full-scale parts, for which the results of cyclic tests in the conditions of asymmetric loading are available. The analyses have been performed employing an elastic-plastic approach using cyclic strain curves taken from original durability equations. The use of new equations ensured a good match between design and experimental durability values. Also, the new equations were used to plot Smith and Hay diagrams for low, mean and high durability. The resulted analytical diagrams represent a high quality illustration of the experimental diagrams found in the publications. The presented approach to the accounting for cycle mean stress and strain will also apply when using experimental cyclic durability curves specific for the material.
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Vlcek, Libor, und Lubomir Junek. „Complex Low-Cycle Fatigue Damage Assessment of Components and Piping of Nuclear Power Plants Type WWER“. In ASME 2017 Pressure Vessels and Piping Conference. American Society of Mechanical Engineers, 2017. http://dx.doi.org/10.1115/pvp2017-65257.
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An innovative principle of low-cycle fatigue (LCF) life assessment suggested for WWER nuclear power plants is presented. In the design stage the fatigue life assessment is based on fatigue design curves, which are introduced in graphical form for air environment. Alternatively and especially for operational stage the fatigue curves are constructed on the basis of mathematical formulas. Mathematical descriptions were validated by strain-controlled LCF laboratory tests. Due to such validated mathematical formulas the complex LCF damage analyses of nuclear power plant components and piping are enabled. In the frame of complex LCF assessment the influence of operating temperatures, stress asymmetry ratio, corrosion environment, neutron fluency and multiaxial loading can be taken into account not only for the base steel materials, but also for their welds. The aim of this paper is to summarise the whole methodology of complex LCF assessment and damage prediction including operational limits of fatigue damage defined in the Czech nuclear standard. The innovation process of original Russian LCF formulas has been running since 2010 based on three national R&D projects focused mainly on environmental aspects and multiaxial loading.
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Noban, Mohammad, und Hamid Jahed. „A Fast Method for Ratchetting Strain Prediction“. In ASME 2006 Pressure Vessels and Piping/ICPVT-11 Conference. ASMEDC, 2006. http://dx.doi.org/10.1115/pvp2006-icpvt-11-93719.
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A time efficient method for predicting ratchetting strain is proposed. By finding the ratchetting rate, at only a few cycles, the ratchetting strain of any cycle can be determined. It is shown that a trajectory of the origin of stress may be defined in the deviatoric stress space as the ratchetting progresses. The method for obtaining this trajectory from a standard uniaxial asymmetric cyclic loading is presented. At the beginning, this trajectory coincides with the initial stress origin and approaches the mean stress, displaying a power law relationship with the number of loading cycles. This path defines a moving frame of reference for stress tensor calculations. Ratchetting rates for different cyclic loading are calculated with the knowledge of this frame of reference and through utilizing a constitutive cyclic plasticity model which incorporates deviatoric stresses and back stresses that are measured with respect to this moving frame. The proposed model is used to predict ratchetting strain of 1070 steel under single step constant amplitude and multi-step loading. The method is also applied to non-proportional loading. Results obtained agree with the available experimental measurements.
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Dickrell, D. J., und M. T. Dugger. „The Effects of Silicone Oil Contamination on the Contact Resistance of MEMS Electrical Contact Surfaces“. In World Tribology Congress III. ASMEDC, 2005. http://dx.doi.org/10.1115/wtc2005-63843.
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Surface contamination has long been known to affect the performance of devices that utilize contacting electrodes. Electrical contact degradation is insensitive to the specific nature of the surface contamination, in that formation of any dielectric material at contact points will result in increased contact resistance. This phenomenon is particularly detrimental in microelectromechanical system (MEMS) electrical contacts, where contact forces are limited and may be insufficient to disrupt surface films. Increases in electrical contact resistance with cyclic operation is a major source of reliability problems associated with MEMS electrical contacts. Silicone oil can act as a highly effective lubricant for sliding MEMS surfaces, increasing operational lifetime for devices with interacting surfaces. However, silicone is also a known source of electrical contact surface contamination, readily decomposing into insulating species when sufficiently energized [1–3]. Even though silicone oil immersed electrical contacts have been successfully used in large contact force electrical contacts, the performance and reliability implications of using silicone-immersed low-force MEMS electrical contacts are not well characterized. The subject of this study was to determine if hot-switched metal contacts immersed in silicone oil will degrade similarly to contacts know to degrade in a non-immersed environment. Electrical contact resistance degradation originating from arcing or metal-bridge-evaporation induced decomposition of surface contamination has been observed previously [4]. Silicone oil immersed low-force electrical contacts were made using a modified nano-indentation apparatus. A schematic of the contact zone is shown in Fig. 1. The apparatus was able to measure electrical contact resistance and adhesion of Au-coated spheres contacting silicone oil-contaminated Au-metallized silicon wafers. The contact forces selected were similar to normal loads achievable in MEMS devices. Figure 2. shows the electrical contact resistance degradation of a silicone oil immersed gold-gold contact vs. the same uncontaminated contact obtained from the experimental apparatus. The data points are the averaged resistance values during the period of maximum applied load, 100 μN in this case. The calculated Hertzian contact area (neglecting roughness effects) was 2.1 μm. The open-circuit voltage was set at 3.3 V and the in-contact current was limited to 3 mA. An individual contact cycle data point taken from Fig. 2, displaying the contact force and resistance versus time, is shown in Fig. 3. The resistance averaged over the peak load remains ∼1.1 Ω, even though during periods of low contact force the contact resistance is several orders of magnitude higher than at peak load. The asymmetry of the contact resistance in Fig. 3 suggests that an interfacial contaminant layer was ruptured during loading, creating adherent metallic contacts and allowing for lower resistance at smaller contact loads. This load-supporting, dielectric layer continues to evolve until, by cycle 20, the conductivity of the contact surfaces has been completely inhibited. Surface analysis of the contaminated surfaces was performed in order to ascertain the composition of the electrical contact interface. Relationships between surface contamination, mechanical stress and electrical contact resistance degradation will be discussed relating to the use of silicone oil in MEMS electrical contacts.
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Jiang, Wei, Ping Yang und Ziya Peng. „Experimental Study on Crack Propagation and Strain Accumulation of Cracked Stiffened Plate Under Cyclic Load“. In ASME 2018 37th International Conference on Ocean, Offshore and Arctic Engineering. American Society of Mechanical Engineers, 2018. http://dx.doi.org/10.1115/omae2018-78596.
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Stiffened plates with cracked damage are often subjected to constant amplitude and/or variable amplitude cyclic loads in sea environment. Under the stress-controlled asymmetric low-cycle fatigue loads, the coupling effect of low-cycle fatigue crack propagation and accumulative plasticity contributes to the increase of accumulative mean strain of cracked structures. Low-cycle fatigue crack growth and the increase of whole strain of cracked structures will change the bearing capacity of cracked structures. In this paper, experimental study on crack propagation and strain accumulation of cracked stiffened plate under low cycle fatigue load has been conducted. AH32 steel is used to make stiffened plate specimen with crack symmetrically located about stiffener. The accumulative strain of the cracked stiffened plate specimens during low-cycle fatigue crack propagation was obtained. From the experiments for cracked stiffened plates under the low-cycle fatigue loading, it is found out that the crack propagates firstly in the weld and then also gradually takes place in the stiffener. The stress ratio of low-cycle fatigue load and stiffener stiffness have been investigated in the experimental study and it is found out that these parameters significantly affect the low-cycle fatigue crack growth life and accumulation strain of the cracked stiffened plate specimens.
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Mu, Lijuan, Xuezhi Dong, Qing Gao, Yongsheng Tian und Chunqing Tan. „A Low Cycle Fatigue Life Prediction Model of Single Crystal Nickel-Based Superalloys Using Critical Plane Approach Combined With Crystallographic Slip Theory“. In ASME Turbo Expo 2017: Turbomachinery Technical Conference and Exposition. American Society of Mechanical Engineers, 2017. http://dx.doi.org/10.1115/gt2017-64598.
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The anisotropy is the most remarkable characteristic for single crystal nickel-based superalloys, which makes fatigue behavior and life prediction highly correlate with the crystallographic orientation. Based on critical plane approach and preferred crystallographic slip mechanism, an anisotropic LCF life model is proposed to account for orientation-dependent fatigue life in this paper. In addition, the effects of the mean stress and stress-weakening caused by asymmetric loading are also considered. The critical plane is determined by searching for 30 potential slip systems. Moreover, the slip plane with the maximum resolved shear stress amplitude in the crystallographic microstructure of the single crystal nickel-based superalloy is chosen as the critical plane. The LCF test data are utilized to obtain the regression equation by multiple linear fitting method. The presented LCF life model is applicable for more complex stress state and has higher prediction accuracy than the CDY model.
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Thiele, Marcus, Swen Weser, Uwe Gampe, Roland Parchem und Samuel Forest. „Advancement of Experimental Methods and Cailletaud Material Model for Life Prediction of Gas Turbine Blades Exposed to Combined Cycle Fatigue“. In ASME Turbo Expo 2012: Turbine Technical Conference and Exposition. American Society of Mechanical Engineers, 2012. http://dx.doi.org/10.1115/gt2012-68452.
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The European project PREMECCY has been conducted to enhance predictive methods for combined cycle fatigue (CCF) of gas turbine blades, i.e. interaction of low cycle fatigue (LCF) and high cycle fatigue (HCF). While design of CCF feature tests, comprising specimen and test rig design, has already been reported, this paper presents experimental HCF/ CCF test results and progress in life prediction. Besides standard lab specimen tests for characterization of single crystal and conventional cast material, also advanced specimens representing critical rotor blade features were tested in a hot gas rig. Based on these experimental data an extended Cailletaud material model for stress-strain analysis has been calibrated and combined with a modified ONERA damage model for creep-fatigue interaction to estimate the lifetime of the advanced test specimens. The model extensions address the effect of ratcheting, which is typical for CMSX-4 at asymmetric cyclic loading at elevated temperature. Caused by limitations of the Armstrong-Frederick kinematic hardening rule regarding ratcheting, three models for improved ratcheting simulation of isotropic material were adopted to anisotropic material. In addition multiple Norton-flow rules for the viscous part of the model are combined with time recovery terms in the kinematic hardening evolution to represent the behaviour of single crystal material in high temperature environment at a wide range of strain rates. Hence, an improved model for stress-strain and lifetime prediction for single crystals has been developed.
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Jung, DaeYi, und Hans DeSmidt. „Limit-Cycle Analysis of Planar Rotor/Autobalancer System Supported on Hydrodynamic Journal Bearing“. In ASME 2011 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. ASMEDC, 2011. http://dx.doi.org/10.1115/detc2011-48723.
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In recent years, there has been much interest in the use of so-called automatic balancing devices (ABD) in rotating machinery. Essentially, ABDs or “autobalancers” consists of several freely moving eccentric balancing masses mounted on the rotor, which, at certain operating speeds, act to cancel rotor imbalance at steady-state. This “automatic balancing” phenomena occurs as a result of nonlinear dynamic interactions between the balancer and rotor wherein the balancer masses naturally synchronize with the rotor with appropriate phase and cancel the imbalance. However, due to inherent nonlinearity of the autobalancer, the potential for other, undesirable, non-synchronous limit-cycle behavior exists. In such situations, the balancer masses do not reach their desired synchronous balanced steady-state positions resulting in increased rotor vibration. Such automatic behavior has been widely studied and is well understood for rotor systems on idealized bearings with symmetric supports. This paper presents a comprehensive study into automatic balancing behavior of an imbalanced planar rigid rotor/ABD system mounted in two different widely-used types of hydrodynamic bearings; i) the short journal bearing with asymmetric stiffness, damping and cross-coupling terms and ii) a so-called tilting-pad bearing. In this study the non-dimensional characteristic curves of stiffness and damping of these two fluid film bearings are employed and the rotor/bearing/ABD system autobalancing behavior is studied as a function of rotor speed, bearing eccentricity and bearing journal radial clearance. These two essential bearing parameters in turn are directly determined by the rotor static loading, bearing structure, and oil viscosity. Consequently, this research focuses on the connectivity between the bearing parameters and the corresponding synchronous balancing and non-synchronous limit-cycle behavior of the system. Here, solutions for rotor limit-cycle amplitudes and corresponding autobalancer ball speeds are obtained via a harmonic balance and numerical continuation solution approach. Furthermore, an exact solution for the limit-cycle is obtained for the special case of symmetric support stiffness together with a so-called Alford’s force cross-coupling term. In each case, the limit-cycle stability is assessed via a perturbation and Floquet analysis and the coexistence of the stable balanced synchronous limit-cycle and undesired non-synchronous limit-cycle is studied. It is found that for certain combinations of bearing parameters and operating speeds, the non-synchronous limit-cycle can be made unstable thus guaranteeing global asymptotic stability of the synchronous balanced condition. Finally, the analysis is validated through numerical time-domain simulation. The findings in this paper yield important insights for researchers wishing to utilize automatic balancing devices in practical rotor systems.
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Birdas, Michail, Narakorn Srinil und Filip Van den Abeele. „Assessment of Pipeline Walking With Coupled Triggering Mechanisms by Finite Element Approach“. In ASME 2015 34th International Conference on Ocean, Offshore and Arctic Engineering. American Society of Mechanical Engineers, 2015. http://dx.doi.org/10.1115/omae2015-42101.
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Asymmetric loading/unloading profiles during the start-up and shut-down operations of high pressure high temperature pipelines may cause an accumulated axial displacement over several operational cycles known as Pipeline Walking phenomenon. This pipeline walking can be triggered by several factors e.g. the seabed slope, riser tension and thermal transients. Several studies have been carried out in the literature regarding the influence from individual factors; nevertheless, very little has been made in the evaluation of coupled triggering mechanisms, common for a pipeline segment. This paper investigates the pipeline walking phenomenon using finite element modelling and analysis software SAGE Profile 3D versus standard analytical formulae. The keys aims are (i) to study the interaction and coupling between the walking triggering mechanisms by comparing coupled and uncoupled analyses, and (ii) to compare the obtained numerical results with analytical predictions, commonly used in the subsea industry. Depending on the pipeline and soil properties, the effect of triggering mechanisms is parametrically investigated with varying pipeline tension and seabed slope for a specific thermal gradient profile. It is found that the common approach to sum up the individual walking rate by the uncoupled analysis for a combination of any two triggering mechanisms, underestimates the walking phenomenon when compared with the coupled analysis. This highlights how attention must be paid to the interaction mechanism. In addition, this study emphasizes that the analytical models severely overestimate the pipeline walking phenomenon, especially when more than one triggering mechanisms are present.