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Journal articles on the topic 'Rupture fatigue'

Author: Grafiati

Published: 4 June 2021

Last updated: 11 February 2022

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1

Bank, A. J., A. Versluis, S. M. Dodge, and W. H. Douglas. "Atherosclerotic plaque rupture: a fatigue process?" Medical Hypotheses 55, no. 6 (December 2000): 480–84. http://dx.doi.org/10.1054/mehy.2000.1096.

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2

Wang, X. T., and R. F. Ker. "Creep and fatigue rupture of tendons." Journal of Biomechanics 27, no. 6 (January 1994): 853. http://dx.doi.org/10.1016/0021-9290(94)91481-8.

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3

Wang, X. T., R. F. Ker, and R. M. Alexander. "Fatigue rupture of wallaby tail tendons." Journal of Experimental Biology 198, no. 3 (March 1, 1995): 847–52. http://dx.doi.org/10.1242/jeb.198.3.847.

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Wallaby tail tendons fail after repeated application of stresses much lower than would be needed to break them in a single pull. We show that this a fatigue phenomenon, distinct from the creep rupture that occurs after prolonged application of a constant stress. The two phenomena are disctinguished by experiments in which tensile stress is cycled at different frequencies, ranging from 1 to 50 Hz.

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4

Liu, Ruofan, and Erol Sancaktar. "Fatigue-induced dual stiffness behavior of filled styrene–butadiene rubber." Proceedings of the Institution of Mechanical Engineers, Part L: Journal of Materials: Design and Applications 233, no. 10 (November 4, 2018): 2006–14. http://dx.doi.org/10.1177/1464420718809502.

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Payne and Mullins effects are widely observed in reinforced rubber materials. The mechanisms by which these two effects work are not fully understood. Several models have been proposed, including molecular slippage model, bond rupture model, and filler rupture model. In this study, two different compounds of styrene–butadiene rubber were prepared using carbon black and silica as reinforcement fillers, respectively, and subjected to cyclic fatigue process. Tensile, creep, and relaxation tests were performed on fatigued samples to assess the residual stress–strain behavior by comparing with the results from similar tests using pristine (no fatigue) samples. When the tensile stiffness behavior of fatigued specimens was evaluated, we noted that the stiffness versus strain behavior which exhibited a monotonic decreasing–increasing behavior with the pristine specimens changed to what we call “dual-stiffness” condition, where the specimens went through a first (low) turning point as with the pristine samples, but then dropped off of a peak to go through a second softening stage, similar to the first softening stage of the pristine material. We believe that such spiking (dual) stiffness behavior characterized by a “Peak” point represents a combination of both Payne and the Mullins effects active during fatigue loading. We conclude that molecular slippage and bond rupture are the main factors affecting the physical properties of carbon black-filled compounds, while breakage and recombination of the filler are the key mechanisms affecting the silica-filled compounds during the fatigue process.

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5

Xie, Xi Shan, Zhengdong Mao, Jian Xin Dong, and Yaohe Hu. "High Temperature Creep, Fatigue and Creep/Fatigue Interaction Behavior of γ' Strengthened Austenitic Iron-Base Superalloy." Key Engineering Materials 297-300 (November 2005): 1458–63. http://dx.doi.org/10.4028/www.scientific.net/kem.297-300.1458.

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A new modified Nb-containing A-286 γ' strengthened austenitic Fe-base superalloy (14Cr- 28Ni-1.5Mo-1W-2Ti-Nb-Al) designated as GH871 in China characterizes with high level of tensile, stress rupture and low cycle fatigue properties at 650°C. However, the stress rupture ductility is low and the crack propagation rates at 650°C creep or creep/fatigue interaction conditions are high. For ductility and crack propagation behavior improvement vacuum melted GH871 can still keep its high strength level, also raise stress rupture ductility and simultaneously to decrease crack propagation rates at 650°C. Our results support GH871 to be used as a disk material in high temperature industry.

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6

Ramião, N. G., P. S. Martins, M. L. Barroso, D. C. Santos, and A. A. Fernandes. "Breast implants rupture induced by fatigue phenomena." Journal of Plastic, Reconstructive & Aesthetic Surgery 70, no. 4 (April 2017): 552–53. http://dx.doi.org/10.1016/j.bjps.2017.01.002.

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7

Versluis, Antheunis, Alan J. Bank, and William H. Douglas. "Fatigue and plaque rupture in myocardial infarction." Journal of Biomechanics 39, no. 2 (January 2006): 339–47. http://dx.doi.org/10.1016/j.jbiomech.2004.10.041.

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8

Ker, R. F., X. T. Wang, and A. V. Pike. "Fatigue quality of mammalian tendons." Journal of Experimental Biology 203, no. 8 (April 15, 2000): 1317–27. http://dx.doi.org/10.1242/jeb.203.8.1317.

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When excised tendons are subjected to a prolonged load, whether constant or oscillatory, fatigue damage accumulates, leading eventually to rupture. ‘Fatigue quality’, assessed by the time-to-rupture under a given stress, was found to vary hugely among the tendons of a wallaby hind limb. This material property correlates with the varied stresses to which tendons from different anatomical sites are exposed in life. The correlation was demonstrated by subjecting each excised tendon to a load equal to the maximum isometric force that its muscle could have developed. The time-to-rupture was then approximately the same for each tendon, on average 4.2 h. A model is introduced in which damage is proposed as the trigger for adaptation of fatigue quality. The model aims, in particular, to explain why low-stressed tendons are not made of a ‘better’ material, although this clearly exists since it is used in high-stressed tendons. The principle of design to a minimum quality is viable in biology because of the availability of self-repair to balance routine damage. Clinical symptoms, to be included under the general heading of ‘overuse injuries’, will only arise when this balance fails.

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9

Ota, Yutaro, Tomomichi Ozaki, and Keiji Kubushiro.O. "The rupture life prediction in cold dwell fatigue of Ti-6Al-4V based on the creep deformation." MATEC Web of Conferences 321 (2020): 11071. http://dx.doi.org/10.1051/matecconf/202032111071.

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Titanium a lloys have been found that the fatigue strength of Ti alloys decreases due to cold dwell fatigue (CDF) at room temperature. Ti and Ti alloys generate creep deformation at room temperature (T/Tm = 0.15). Thus, it is considered that creep affects the reduction in fatigue life in CDF tests. This research intends to clarify the effects of long time dwell under tensile stress and rupture life prediction from the view of creep deformation in CDF characteristics of Ti-6Al-4V. Rupture cycle decreased with increase of dwell time. Additionally, lower limit of rupture life ratio “NCDF/NLCF” was defined from rupture in creep test if it was assumed that creep test was extremely long time dwell CDF test. When strain change in whole dwell time was extracted in CDF tests, strain change was like creep curves and minimum creep rate changed depending on dwell time. Minimum creep rate was calculated by the formula based on experimental results, and then rupture time was calculated by Monkman-grant relationship. All of rupture cycle predictions were in factor of 2. Therefore, rupture cycle and time can be calculated if dwell time is known in CDF tests.

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10

Wu, Baijian, Xuan Pei, and Zhi-Yong Li. "How Does Calcification Influence Plaque Vulnerability? Insights from Fatigue Analysis." Scientific World Journal 2014 (2014): 1–8. http://dx.doi.org/10.1155/2014/417324.

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Background.Calcification is commonly believed to be associated with cardiovascular disease burden. But whether or not the calcifications have a negative effect on plaque vulnerability is still under debate.Methods and Results.Fatigue rupture analysis and the fatigue life were used to evaluate the rupture risk. An idealized baseline model containing no calcification was first built. Based on the baseline model, we investigated the influence of calcification on rupture path and fatigue life by adding a circular calcification and changing its location within the fibrous cap area. Results show that 84.0% of calcified cases increase the fatigue life up to 11.4%. For rupture paths 10Dfar from the calcification, the life change is negligible. Calcifications close to lumen increase more fatigue life than those close to the lipid pool. Also, calcifications in the middle area of fibrous cap increase more fatigue life than those in the shoulder area.Conclusion.Calcifications may play a positive role in the plaque stability. The influence of the calcification only exists in a local area. Calcifications close to lumen may be influenced more than those close to lipid pool. And calcifications in the middle area of fibrous cap are seemly influenced more than those in the shoulder area.

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11

Chun, Pang Jo, and Takashi Matsumoto. "Optimal Design of DFRCC Subjected to Fatigue Loading." Advanced Materials Research 250-253 (May 2011): 430–33. http://dx.doi.org/10.4028/www.scientific.net/amr.250-253.430.

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This paper describes the optimal design of ductile fiber reinforced cementitious composite (DFRCC) under fatigue loading. First of all, fatigue tensile experiments of the DFRCC under constant strain amplitude were conducted, and the degradation of bridging stress was measured. The test results were employed to verify the micromechanics-based theoretical model developed in this research. The model accounts for the loss of fatigue ruptured fibers of which fatigue rupture is based on S-N relationships. According to the parametric study from the theoretical model, we found that the optimal choice of design variables, such as fiber length, is varied according to the maximum strain level and the number of cyclic loading. Therefore, it is required to design DFRCC optimally under given loading conditions to make the most of its excellent material properties and the developed model enables such a design.

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12

Zhang, Dan Feng, Xiao Ming Tan, Xing Fan, and Jia Rui Qi. "Study on Probability Prediction Approach to Holistic Life Based on Fracture Theory." Advanced Materials Research 512-515 (May 2012): 2011–14. http://dx.doi.org/10.4028/www.scientific.net/amr.512-515.2011.

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Fatigue life can be divided into crack initiation life and crack propagation life in fatigue damage process. Fatigue crack comes of the initial discontinuity states （IDS） of material, and goes through short crack , long crack and rupture failure. A estimation model based on fracture theory is built, in which includes of IDS, short crack, long crack and rupture failure. A fatigue holistic life (including fatigue life, the residual life and the calendar life ) estimation model was built on the basis of IDS in which the aircraft structures had not been corrosion damage. A lot of fatigue tests with different stress level and different stress ratio are carried out to validate the model. The results demonstrate that the approach is reasonable and feasible.

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13

Newman, R. "Occupational fatigue and preterm premature rupture of membranes." American Journal of Obstetrics and Gynecology 176, no. 1 (January 1997): S35. http://dx.doi.org/10.1016/s0002-9378(97)80154-8.

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14

Prager, M. "Progress in Analysis of Fatigue and Stress Rupture." Journal of Pressure Vessel Technology 107, no. 1 (February 1, 1985): 99–100. http://dx.doi.org/10.1115/1.3264419.

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15

Newman, R. B., R. L. Goldenberg, A. H. Moawad, J. D. Iams, P. J. Meis, A. Das, M. Miodovnik, et al. "Occupational fatigue and preterm premature rupture of membranes." American Journal of Obstetrics and Gynecology 184, no. 3 (February 2001): 438–46. http://dx.doi.org/10.1067/mob.2001.110312.

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16

Stehbens, W. E. "The fatigue hypothesis of plaque rupture and atherosclerosis." Medical Hypotheses 58, no. 4 (April 2002): 359–60. http://dx.doi.org/10.1054/mehy.2001.1540.

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17

Williams, P. T., and J. R. Cahoon. "Amalgam Margin Breakdown Caused by Creep Fatigue Rupture." Journal of Dental Research 68, no. 7 (July 1989): 1188–93. http://dx.doi.org/10.1177/00220345890680070901.

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18

Barletta, M., F. Lambiase, and Vincenzo Tagliaferri. "Improvement of Fatigue Behaviour of High Strength Aluminium Alloys by Fluidized Bed Peening (FBP)." Key Engineering Materials 344 (July 2007): 87–96. http://dx.doi.org/10.4028/www.scientific.net/kem.344.87.

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This paper deals with a definition of a relatively novel technique to improve the fatigue behavior of high strength aluminum alloys, namely, Fluidized Bed Peening (FBP). Fatigue samples made from AA 6082 T6 alloy were chosen according to ASTM regulation about rotating bending fatigue test and, subsequently, treated by varying FBP operational parameters and fatigue testing conditions. First, a full factorial experimental plan was performed to assess the trend of number of cycles to rupture of fatigue samples varying among several experimental levels the factors peening time and maximum amplitude of alternating stress applied to fatigue samples during rotating bending fatigue tests. Second, design of experiment (DOE) technique was used to analyze the influence of FBP operational parameters on fatigue life of AA 6082 T6 alloy. Finally, ruptures of FB treated samples and untreated samples were discussed in order to evaluate the influence of operational parameters on the effectiveness of FBP process and to understand the leading process mechanisms. At any rate, the fatigue behavior of processed components was found to be significantly improved, thereby proving the suitability of FBP process as alternative mechanical technique to enhance fatigue life of components made from high strength aluminum alloy.

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19

Chun, Pang Jo, and Mitao Ohga. "Effect of Fiber Diameter on Fatigue Strength of Fiber Reinforced Concrete and its Design." Applied Mechanics and Materials 138-139 (November 2011): 810–15. http://dx.doi.org/10.4028/www.scientific.net/amm.138-139.810.

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This paper describes the effect of fiber diameter of fiber reinforced concrete (FRC) under fatigue behavior and its design method. Some researchers showed that the fatigue behavior of FRC is mainly governed by the bridging stress degradation, but little information is still available so far. We conducted fatigue tensile experiments of the FRC under constant strain amplitude first and the degradation of bridging stress was measured experimentally. Then, the micromechanics-based theoretical model is also developed, and the model is verified by the test results. The model accounts for the loss of fatigue ruptured fibers of which fatigue rupture is based on S-N relationships. The parametric study from the micromechanics-based theoretical model indicates that the best fiber diameter varies according to the number of cycles and strain level applied to the FRC specimen. The result suggests that we need to design FRC with considering the application and its loading conditions to utilize the capacity of FRC.

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20

Munoz, Luisa, Loïc Vanel, Olivier Sanseau, Paul Sotta, Didier Long, Laurent Guy, and Ludovic Odoni. "Fatigue Behavior in Filled Natural Rubber: Study of the Mechanical Damage Dynamics." Key Engineering Materials 488-489 (September 2011): 666–69. http://dx.doi.org/10.4028/www.scientific.net/kem.488-489.666.

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Rupture dynamics in reinforced elastomers is a much more complex process than in pure elastomers due to the intrinsic heterogeneous mixture of a rubber matrix with filler particles at submicronic scale. In the case of natural rubber, an additional source of heterogeneity is the strain-crystallization effect. How rupture dynamics and crack path are affected by filler particles and strain-crystallization is still a matter of debate. Actually, understanding how rupture dynamics and crack path are correlated to each other is probably an important key in order to improve long time resistance of reinforced rubbers.

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21

Qiao, Ning, Mu Xiao Shan, and Ye Zheng Li. "Metal Magnetic Memory Testing of Welded Joints under Fatigue Load." Materials Science Forum 898 (June 2017): 1069–78. http://dx.doi.org/10.4028/www.scientific.net/msf.898.1069.

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To investigate the influence of stress concentration, crack propagation and types of fatigue loading on metal magnetic memory signals, two groups of fatigue experiments with different types of fatigue loading were carried out on Q235B steel welded joint. The normal components of magnetic flux leakage were measured by metal magnetic memory tester in the course of fatigue test, and the fracture surfaces of specimens were observed by scanning electron microscopy after fatigue tests. The experimental results showed that the normal components of magnetic flux leakage filed, as well as the metal magnetic memory signal, changed polarity and their gradients have peak values at stress concentration zones. The zero position of the normal component of magnetic flux leakage changed gradually with increasing cycle numbers. In addition, the metal magnetic memory signal feature of fatigue crack propagation was affected by the loading type clearly. Moreover, a combination of brittle rupture and ductile rupture was obtained in the fracture morphology figure.

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22

Shi, Jia Lian, Chang Liang Xu, Gui Yun Meng, and Da Dong Ma. "Fatigue Analysis of Vibration Device with 4 Eccentric Axis for Billet Caster." Applied Mechanics and Materials 401-403 (September 2013): 151–54. http://dx.doi.org/10.4028/www.scientific.net/amm.401-403.151.

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The fatigue rupture is the main form on eccentric axis. Afterwards, make the load function by the eccentric axis and transient dynamics analysis of 4 eccentric axis by ANSYS software. Confirm the dangerous section and nodes. Finally, make fatigue analysis of vibration device with 4 eccentric axis, get the accumulation fatigue factor and get the fatigue life.

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23

Zhao, Rong Guo, Yi Yan, Yong Zhou Jiang, Xi Yan Luo, Qi Bang Li, Ya Feng Liu, Peng Cai, and Yue Chen. "Analysis on Low Cycle Fatigue Life and Fatigue Fracture Surface Morphology of TC25 Titanium Alloy." Key Engineering Materials 697 (July 2016): 652–57. http://dx.doi.org/10.4028/www.scientific.net/kem.697.652.

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At room temperature, the low cycle fatigue tests for smooth specimens of TC25 titanium alloy under various stress ranges are operated at a CSS280I-20w Electro Hydraulic Servo Universal Testing Machine with a microscopic observation system, and the low cycle fatigue lifetimes are measured. Based upon the analysis of stress-strain hysteresis loop of low cycle fatigue of TC25 titanium alloy, a simplified Manson-Coffin formula is derived according to both the experimental characteristics and the stress-strain constitutive model, the fatigue lifetimes are plotted against stress ranges, and a stress-fatigue life curve for TC25 titanium alloy is obtained by the linear regression analysis method. Finally, the fracture surface morphologies of TC25 specimens are investigated using a JSM-6360 Scanning Electron Microscopy, and the fatigue fracture mechanisms of low cycle fatigue are studied. It shows that the plastic deformations are mainly formed at the accelerated fracture stage, and various shear lips can be observed on the fracture surfaces, which demonstrates that the shear stress results in the final rupture of TC25 titanium alloy. During the fracture of low cycle fatigue, the cleavage nucleation leads to the formation of fatigue crack initiation region, the fatigue crack growth exhibits a mixed transgranular and intergranular crack growth mode, and in the final rupture region, the fracture surface of low cycle fatigue of TC25 titanium alloy appears as a typical semi-brittle fracture mode.

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24

Fernandez, Alfonso, and Stephen E. Pautler. "Metal Fatigue Causing Cystoscope Rupture During Bladder Neck Incision." JSLS : Journal of the Society of Laparoendoscopic Surgeons 15, no. 3 (2011): 421–23. http://dx.doi.org/10.4293/108680811x13125733356710.

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25

Pei, Xuan, Baijian Wu, Tjun Y. Tang, Jonathan H. Gillard, and Zhi-Yong Li. "Fatigue Crack Growth Under Pulsatile Pressure and Plaque Rupture." JACC: Cardiovascular Imaging 7, no. 7 (July 2014): 738–40. http://dx.doi.org/10.1016/j.jcmg.2014.01.019.

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26

Harlow, D. G., and T. J. Delph. "A Probabilistic Model for Creep-Fatigue Failure." Journal of Pressure Vessel Technology 119, no. 1 (February 1, 1997): 45–51. http://dx.doi.org/10.1115/1.2842265.

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We outline here a method for incorporating the scatter observed in creep rupture times and fatigue cycles-to-failure into a probabilistic model for creep-fatigue failure. We do this within the context of the well-known damage fraction summation rule. Various numerical methods for calculating the probability of failure for given creep-fatigue loading cycles are discussed.

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27

Liu, Y., Jin Jiang Yu, Yan Xu, Xiao Feng Sun, Heng Rong Guan, and Zhuang Qi Hu. "Temperature Dependence of High-Cycle Fatigue Behavior of a Ni-Base Single Crystal Superalloy." Materials Science Forum 546-549 (May 2007): 1219–24. http://dx.doi.org/10.4028/www.scientific.net/msf.546-549.1219.

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Smooth specimens of single crystal (SC) superalloy SRR99 with [001] orientation were subjected to high-cycle fatigue (HCF) loading at temperatures of 700°C, 760°C, 850°C and 900°C in air atmosphere. The results demonstrated that conditional fatigue strength reached the maximum at 760°C and decreases with increasing temperature. Analysis on fracture surface showed a trend for cleavage rupture at 850°C and 900°C and ductile rupture at 700°C and 760°C. Fatigue cracks initiated at the surface or subsurface were primarily responsible for the ultimate failure. The influence of testing temperature on fatigue lifetime was studied by examining evolution of the microstructure through SEM observation. With the process of cyclic loading at elevated temperatures, the primary cuboidal γ′ precipitates tended to agglomerate and spheroidized, meanwhile a larger number of secondary γ′ particles were formed in the γ matrix in specimens fatigue tested at 700°C, which would have a significant effect on the high temperature properties.

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28

Hamed, Gary R. "Molecular Aspects of the Fatigue and Fracture of Rubber." Rubber Chemistry and Technology 67, no. 3 (July 1, 1994): 529–36. http://dx.doi.org/10.5254/1.3538689.

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Abstract This short review highlights molecular mechanisms controlling the fracture of rubber and rubber reinforcement, with emphasis on the importance of mechano-chemistry. The manuscript is an extension and update of a previous short review published in Rubber Chemistry and Technology in 1991. All solids, including vulcanizates, contain inevitable ubiquitous flaws of various shapes and sizes. When a solid is subjected to a global stress, the local stresses at the tips of these flaws are magnified and can be many times larger than the average applied stress. Generally, there will be a single flaw at which the stress is magnified to the greatest degree and where fracture begins. Macroscopic fracture of vulcanized rubber is a process in which network chains are broken and new free surface area is created as a result of mechanical loading. Loading may be continuously increasing up to fracture (monotonic fracture) or it may be applied periodically, typically at much lower levels, until fracture ensues (fatigue fracture). For example, a specimen which breaks at, say, 20 MPa when loaded monotonically in tension may fracture, nonetheless, at only 5 MPa, if this load is repeatedly applied. In many rubber articles, two important types of fatigue fracture are fatigue crack growth and abrasion. With the former a (bulk) crack initiates (perhaps at an included impurity or microvoid) and grows as a result of “far-field” loading, whereas, with abrasion, fracture is caused by the direct action of frictional, sliding forces. The events occurring at the tip of a crack are quite important in controlling its growth. In particular, if a crack tip becomes blunted during deformation, or if there are other processes occurring which reduce the load borne by the molecular chains at the crack tip, then stress concentration will be reduced and fracture inhibited. If an elastomeric network is capable of dissipating input energy into heat through irreversible molecular motions, less elastic nergy will be available to break network bonds apart, and fracture energy is increased. More on the role of energy dissipation in fracture is given later. Both fatigue crack growth and abrasion are the culmination of accumulated damage due to mechano-chemical processes. Consider a rubbery article which contains a distribution of chain lengths between crosslink points, and which is subject to fatigue. When deformed, chains align, and the load is inequitably carried by the network strands. The network strives to distribute the stress among the chains, but it is limited from completely doing so because of the complex topology. At sufficiently low elongation, no chains are broken, but as deformation progresses, one network chain eventually ruptures. The force that the chain was carrying prior to breakage is quickly distributed among neighboring chains. This results in the overloading and rupture of some of these chains. (Electron spin resonance spectroscopy has been used to detect free radicals resulting from homolytic cleavage of network chains.) At this point, there has been molecular chain breakage (network damage), but no macroscopic fracture (creation of new free surface area). Chain breakage is not random, but rather is more prevalent in those “elements” where chains broke in the first place. If deformation were monotonously continued to a high level, there would be a particular element which experienced more chain rupture than any other, and a macroscopic crack would open there (far-field loading) or a portion of the material would be removed (frictional loading). However, in (mild) fatigue the article is unloaded well before sufficient damage has occurred in the first cycle to cause crack growth or abrasive loss. After the first cycle, the article contains elements with varying degrees of damage. In subsequent cycles there is more chain rupture (damage accumulation) and eventually macroscopic fracture ensues. It is interesting to calculate the number of chains which must break at one location in order to create 1 µm2 of fracture surface. Assuming a chain cross-sectional area of 0.5 nm2, this would require the rupture of 2(106) chains. Nonetheless, the number of localized molecular chain ruptures necessary to constitute the onset of macroscopic fracture is unclear.

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29

Huang, Shuang Hua, Wen Ba Han, Zhao Rong Zeng, and Qiang Luo. "Fatigue Analysis Based on the Non-Zero Point Force Moment Elasticity Theory." Applied Mechanics and Materials 590 (June 2014): 32–36. http://dx.doi.org/10.4028/www.scientific.net/amm.590.32.

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The current theory of elasticity persisted in the standpoint that normal stress exists in pure bending and shearing stress exists in pure torsion, which has been negated by the non-zero point force moment elasticity theory .The mentioned new theory proved that bending point moment exists in pure bending and torsional point moment exists in pure torsion, which debunk the current theory of elasticity that the limit moment acting on the unit area is zero. As a consequence, the causation of fatigue should be revised as point moment instead of stress. By using theory of stress and the new theory to analyze fatigue of non-slender rod, safety factor worked out by the former one is much bigger, which suggests that theory of stress cannot ensure safety. Undoubtedly, that is the fundamental causation of frequent occurrence of fatigue rupture. Thus, the new theory is of great significance in the prevention of unexpected fatigue rupture in the field of aerospace, navigation, transportation and mechanical engineering, etc.

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30

Wang, Jian Hua, Jian Hua, and Chao Li. "Fatigue Strength and Modal Analysis of S195 Engine Crankshaft." Applied Mechanics and Materials 120 (October 2011): 81–84. http://dx.doi.org/10.4028/www.scientific.net/amm.120.81.

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Fatigue rupture is the major reason of crankshaft parts failure. Traditional fatigue analysis is fairly complicated and causes a great error. The finite element model of s195 engine crankshaft is created under SolidWorks environment, whose static analysis and fatigue analysis is carried out by using Simulation module. Also the vibration character of the crankshaft is calculated through modal analysis. Result shows the fatigue strength of the crankshaft is enough and it will not produce resonance in operation.

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31

Pietranico, Sylvain, Sylvie Pommier, Stéphane Lefebvre, and Zoubir Khatir. "Rupture fragile et fatigue des substrats DBC. Applications haute température." Revue internationale de génie électrique 12, no. 2 (April 27, 2009): 271–89. http://dx.doi.org/10.3166/ejee.12.271-289.

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32

Bell, R., M. R. Boniello, N. R. Gendron, E. L. Flatow, and N. Andarawis-Puri. "Delayed exercise promotes remodeling in sub-rupture fatigue damaged tendons." Journal of Orthopaedic Research 33, no. 6 (March 31, 2015): 919–25. http://dx.doi.org/10.1002/jor.22856.

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33

Bourne, Matthew N., Kate E. Webster, and Timothy E. Hewett. "Is Fatigue a Risk Factor for Anterior Cruciate Ligament Rupture?" Sports Medicine 49, no. 11 (June 10, 2019): 1629–35. http://dx.doi.org/10.1007/s40279-019-01134-5.

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34

Macek, Wojciech, Ricardo Branco, Mirosław Szala, Zbigniew Marciniak, Robert Ulewicz, Norbert Sczygiol, and Piotr Kardasz. "Profile and Areal Surface Parameters for Fatigue Fracture Characterisation." Materials 13, no. 17 (August 20, 2020): 3691. http://dx.doi.org/10.3390/ma13173691.

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Post-mortem characterisation is a pivotal tool to trace back to the origin of structural failures in modern engineering analyses. This work compared both the crack propagation and rupture roughness profiles based on areal parameters for total fracture area. Notched and smooth samples made of weather-resistant structural steel (10HNAP), popular S355J2 structural steel and aluminium alloy AW-2017A under bending, torsion and combined bending–torsion were investigated. After the fatigue tests, fatigue fractures were measured with an optical profilometer, and the relevant surface parameters were critically compared. The results showed a great impact of the loading scenario on both the local profiles and total fracture areas. Both approaches (local and total fracture zones) for specimens with different geometries were investigated. For all specimens, measured texture parameters decreased in the following order: total area, rupture area and propagation area.

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35

Wang, Zhi Ping. "Research on Fatigue Behaviors of Nodular Cast Iron QT800 by Laser Shock Processing." Advanced Materials Research 136 (October 2010): 260–63. http://dx.doi.org/10.4028/www.scientific.net/amr.136.260.

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The surface of nodular cast iron QT800 was processed with LSP, its micro-structures, residual stress and fatigue test were compared before and after LSP, and the rupture morphologies of fatigue test were analyzed, the effects of LSP on fatigue behavior of QT800 were discussed. The results shown that the compressive residual stress of QT800 by LSP is over 400MPa, and its fatigue life is increased 20% than that in primitive state; the fatigue resource or the sample by LSP is produced near the graphite, compressive residual stress and refined grain effectively delays cracks initiation of the fatigue source, the expansion speed of fatigue cracks is decreased, which increases fatigue life of QT800.

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Tang, Jian Qun, Lu Yang Geng, and Jian Ming Gong. "Analysis on Bursting of Rupture Disc Made by Inconel 600 Alloy." Key Engineering Materials 795 (March 2019): 290–95. http://dx.doi.org/10.4028/www.scientific.net/kem.795.290.

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One conventional domed slotted rupture disc, which was fabricated with Inconel 600 alloy, was used in reaction kettle. It was burst after only 2000 times of operational circles. The burst causes were investigated. Morphologies of the fracture were observed by scanning electron microscope and the relatively chemical compositions were analyzed by energy dispersive spectrometer. Meanwhile, metallographic microstructures were also observed and analyzed for the material of the failure of the rupture disc. The results show that the bursting of the rupture disc was caused by fatigue fracture.

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Zhang, Heng Liang, Dan Mei Xie, Chu Nie, and Yang Heng Xiong. "Online Fatigue and Creep Monitoring System for 2-D Axis-Symmetry Components in Power Plants." Applied Mechanics and Materials 130-134 (October 2011): 3866–69. http://dx.doi.org/10.4028/www.scientific.net/amm.130-134.3866.

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This paper presents a system developed for online monitoring of various aging effects, such as fatigue, creep and fatigue–creep interaction. An appropriate life prediction methodology has been used to address the various aspects of creep, fatigue and creep fatigue interaction, creep and fatigue crack growth. The system converts the plant transients to temperature and stress responses using the analytical models modified by FEM. The fatigue usage factor is computed using the rainﬂow cycle counting algorithm. The creep damage index is evaluated from the computed temperature and stress histories and the material creep rupture curve. This system has already been installed at Henan Jiaozuo power plant in china for monitoring the fatigue and creep degradation.

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Yang, You, Hua Wu, and Zhao Feng Xuan. "Effect of Solid Solution Treatment on Fatigue Behavior of Cast Magnesium Alloy." Applied Mechanics and Materials 281 (January 2013): 436–40. http://dx.doi.org/10.4028/www.scientific.net/amm.281.436.

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The effects of solid solution treatment on high cycle fatigue behavior of cast magnesium alloy AZ91D were investigated using an up-and-down load method. High cycle fatigue tests were carried out up to 107cycles at a stress ratio R=0.1 and frequency of 90Hz on specimens using a high frequency fatigue machine. The results showed that the fatigue strength of cast AZ91D magnesium alloy increase from 54.5Mpa to 71.5Mpa after solid solution treatment (T4) at 415°C, keeping temperature 16hours. The micro-fatigue fracture surface of alloy included fatigue initiation area, fatigue crack propagation area and fatigue fracture area. Fatigue crack of the alloys initiate principally at inclusions and shrinks under subsurface. The fatigue fracture of test specimens show the rupture characteristics of quasi-cleavage(as-cast alloy) and toughness(T4 alloy), respectively.

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Lamon, Jacques. "Static Fatigue of SiC Multifilament Tows at Temperatures up to 1200 °C in Air." Ceramics 2, no. 3 (July 1, 2019): 426–40. http://dx.doi.org/10.3390/ceramics2030033.

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SiC-based fibers are sensitive to delayed failure under constant load at high temperatures in air. Static fatigue at intermediate temperatures < 800 °C was attributed to slow crack growth from flaws located at the surface of fibers, driven by the oxidation of free carbon at grain boundaries. The present paper examines the static fatigue behavior of SiC-based Hi-Nicalon fibers at high temperatures up to 1200 °C and Hi Nicalon S fibers at intermediate temperatures (500–800 °C). The degradation of stress- rupture time relation of multifilament tows with increasing temperature was investigated. Predictions of tow lifetime based on critical filament-based model of tow failure were compared to experimental stress-rupture time diagrams. Critical filaments are characterized by strength–probability relation. The critical filament-based model was found to describe satisfactorily the static fatigue behavior of fiber tows at these temperatures. The influence of various factors on lifetime as well as the origins of variability is analyzed.

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Wu, Baijian, Zhaoxia Li, Keke Tang, and Kang Wang. "Microscopic Multiple Fatigue Crack Simulation and Macroscopic Damage Evolution of Concrete Beam." Applied Sciences 9, no. 21 (November 1, 2019): 4664. http://dx.doi.org/10.3390/app9214664.

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Microcracks in concrete can coalesce into larger cracks that further propagate under repetitive load cycles. Complex process of crack formation and growth are essentially involved in the failure mechanism of concrete. Understanding the crack formation and propagation is one of the core issues in fatigue damage evaluation of concrete materials and components. In this regard, a numerical model was formulated to simulate the thorough failure process, ranging from microcracks growth, crack coalescence, macrocrack formation and propagation, to the final rupture. This model is applied to simulate the fatigue rupture of three-point bending concrete beams at different stress levels. Numerical results are qualitatively consistent with the experimental observations published in literature. Furthermore, in the framework of damage mechanics, one damage variable is defined to reflect stiffness reduction caused by fatigue loading. S-N curve is subsequently computed and the macroscopic damage evolution of concrete beams are achieved. By employing the combined approaches of fracture mechanics and damage mechanics, made possible is the damage evolution of concrete beam as well as the microscopic multiple fatigue crack simulation. The proposed approach has the potential to be applied to the fatigue life assessment of materials and components at various scales in engineering practice.

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Zhang, Zhijin, and Mingqi Zhang. "Effect of different drilling techniques on high-cycle fatigue behavior of nickel-based single-crystal superalloy with film cooling hole." High Temperature Materials and Processes 40, no. 1 (January 1, 2021): 121–30. http://dx.doi.org/10.1515/htmp-2020-0072.

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Abstract The flat plate specimens of nickel-based single-crystal superalloy with 14 film cooling holes, which made by different drilling techniques, were used to study the high-cycle fatigue (HCF) properties at 980°C in an ambient atmosphere. At the same time, the electrical discharge machining (EDM) specimens with a single hole were also used to study the HCF properties under different temperatures. The hole and fracture micrographs were analyzed by scanning electron microscope. The results indicated that different drilling techniques have a great influence on HCF life. The fatigue limit of the millisecond laser drilling is 353 MPa, while the EDM is 359 MPa and the electro-stream machining (ESM) is 378 MPa. The fatigue life decreases gradually with the temperature increasing. The fatigue limit of EDM specimens with a single hole at 900°C, 980°C, and 1,050°C are 472, 430, and 293 MPa, respectively. The destruction of the specimens is a typical multisource rupture, and the fracture morphology includes three parts: the cracks sources around the film cooling hole, the propagation zone along the {001} planes, and instant rupture zone along the {111} planes.

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YAMAGUCHI, Koji, Naoyuki SUZUKI, Kiyoshi IJIMA, and Kenji KANAZAWA. "Prediction of Creep-fatigue Life by Use of Creep Rupture Ductility." Tetsu-to-Hagane 71, no. 11 (1985): 1526–33. http://dx.doi.org/10.2355/tetsutohagane1955.71.11_1526.

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43

Ochs, J. "Job-Related Fatigue during First Pregnancy May Cause Early Membrane Rupture." Family Planning Perspectives 33, no. 3 (May 2001): 138. http://dx.doi.org/10.2307/2673777.

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Pitoulias, Georgios A., Dimitrios M. Mavros, Evaggelos A. Pappas, Stefanos K. Atmatzidis, and Dimitrios K. Papadimitriou. "Chronic Contained Abdominal Aortic Aneurysm Rupture After Suprarenal Fixation Fatigue Fracture." Annals of Vascular Surgery 26, no. 7 (October 2012): 1011.e7–1011.e10. http://dx.doi.org/10.1016/j.avsg.2012.03.015.

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45

Vandermeulen, W., H. Chen, W. Hendrix, and J. Ketels. "Observations on the fatigue rupture mechanism of neutron-irradiated AISI 3161." Journal of Nuclear Materials 172, no. 2 (July 1990): 246–47. http://dx.doi.org/10.1016/0022-3115(90)90445-s.

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46

Prewo, Karl M. "Fatigue and stress rupture of silicon carbide fibre-reinforced glass-ceramics." Journal of Materials Science 22, no. 8 (August 1987): 2695–701. http://dx.doi.org/10.1007/bf01086459.

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47

Salam, I., Aamer Nusair Khan, and M. Farooque. "Failure of the Pressure Bulkhead of a Passenger Aircraft - A Case Study." Key Engineering Materials 510-511 (May 2012): 206–13. http://dx.doi.org/10.4028/www.scientific.net/kem.510-511.206.

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The pressure bulkhead of a passenger aircraft ruptured when the aircraft was cruising at a height of 28,000 ft. Because of the sudden rupture, the rear toilets disintegrated and things like toilet rolls, tissue papers, towels, were sucked into the stabilizer compartment, where the entire tail control system was located. The debris damaged the green hydraulic system, ruptured fuel line and jammed the control cables. The damage resulted in the aircraft going into pitch-up mode (take-off position) and almost approached stalling position. The failed part was located near the toilets. Water from the toilets reached in this region due to leakage and penetrated inside the sheets and corrosion started in the presence of stagnant water. This was supplemented by the stresses present on the structure during flight. Stress corrosion started from inner sheet and led to initiation of fatigue. The combined effect of stress corrosion cracking and fatigue resulted in the failure of this sheet. No third stage (catastrophic) failure was observed in the fracture. The absence of catastrophic failure mode in the fractured sheet showed that it stood up to last stage.

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48

Jing, Xin, Zhen Cheng, Hongwei Niu, Xiaoguang Yang, and Duoqi Shi. "Deformation and rupture behaviors of SiC/SiC under creep, fatigue and dwell-fatigue load at 1300 °C." Ceramics International 45, no. 17 (December 2019): 21440–47. http://dx.doi.org/10.1016/j.ceramint.2019.07.134.

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49

Gilmartin, Stephen, Stephen Hatton, and John Ryan. "Teenage kicks: splenic rupture secondary following infectious mononucleosis." BMJ Case Reports 12, no. 5 (May 2019): e229030. http://dx.doi.org/10.1136/bcr-2018-229030.

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A 16-year-old man was brought to the emergency department by his father with apparent alcohol intoxication. While in the department, it was noted that the patient had ongoing tachycardia, hypotension and abdominal pain. His recent medical history included a self-resolving illness of fatigue, muscle aches and sore throat. A CT scan of his abdomen revealed an enlarged spleen with a splenic infarct and rupture, likely secondary to infectious mononucleosis. The patient was treated conservatively for 12 days.

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50

Lambert, Ronald. "Fatigue Damage Prediction for Combined Random and Static Mean Stresses." Journal of the IEST 36, no. 3 (May 1, 1993): 25–32. http://dx.doi.org/10.17764/jiet.2.36.3.9852521p1145l0t7.

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Closed form analytical expressions have been derived and are proposed for use to predict accumulated fatigue damage and fatigue life of structural elements subjected to a combination of fully reversed narrow-band Gaussian random and static mean stresses. Such mean stresses can significantly alter fatigue life. The proposed method of combining random alternating and mean stresses shows excellent agreement with published experimental data for a steel alloy. Reasonable agreement is maintained, surprisingly, even for static tensile stress values up to near the material's yield stress where the failure mode shifts from that of typical brittle fatigue to that of stress rupture (i.c.,creep). Numerical examples are provided to illustratc the application.

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