Relevant bibliographies by topics / Fatigue life of metals

Academic literature on the topic 'Fatigue life of metals'

Author: Grafiati
Published: 10 December 2022
Last updated: 19 February 2023

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Journal articles on the topic "Fatigue life of metals"

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Enomoto, Masatoshi. "Prediction of Fatigue Life for Light Metals and their Welded Metals." Materials Science Forum 794-796 (June 2014): 273–77. http://dx.doi.org/10.4028/www.scientific.net/msf.794-796.273.

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A6N01 (6005C in ISO) base metal is applied for cantilever type fatigue test over 108 cyclic number. Fatigue strength decreases over 107 and after testing, new prediction formula of fatigue life at high cycle regeion which named YENs formula is proposed for light metal and their welded joints. This formula is shown as below. Log (σa/σp) =k Log (Nf-N0)+m σa is stress amplitude, σp is proof stress k is depend on stress concentration factor Nf is fatigue life without residual stress and No is discrepancy due to residual stress. m is material constant. This formula is a hypothesis and it is required to accumulate much more fatigue data for many kind of alloys and their welded joints.
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Makkonen, M. "Predicting the total fatigue life in metals." International Journal of Fatigue 31, no. 7 (July 2009): 1163–75. http://dx.doi.org/10.1016/j.ijfatigue.2008.12.008.

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Szala, Grzegorz. "Influence of Stresses below the Fatigue Limit on Fatigue Life." Solid State Phenomena 224 (November 2014): 45–50. http://dx.doi.org/10.4028/www.scientific.net/ssp.224.45.

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According to the performed analysis of fatigue phenomena occurring in metals, the effects of fatigue appear in the form of lines and slip bands under loading conditions producing variable stresses with values below the fatigue limit of these metals. It is commonly accepted that variable stresses with constant amplitude of values below 0.4 of the fatigue limit do not cause plastic strain in grains (lines and slip bands), thus they do not affect the fatigue life. This study is an attempt of quantitative assessment of the influence of stresses with values below the fatigue limit on fatigue life by using tests with programed two-step loading (variable-amplitude). Tests were performed with the use of C45 steel specimens.
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Santecchia, E., A. M. S. Hamouda, F. Musharavati, E. Zalnezhad, M. Cabibbo, M. El Mehtedi, and S. Spigarelli. "A Review on Fatigue Life Prediction Methods for Metals." Advances in Materials Science and Engineering 2016 (2016): 1–26. http://dx.doi.org/10.1155/2016/9573524.

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Metallic materials are extensively used in engineering structures and fatigue failure is one of the most common failure modes of metal structures. Fatigue phenomena occur when a material is subjected to fluctuating stresses and strains, which lead to failure due to damage accumulation. Different methods, including the Palmgren-Miner linear damage rule- (LDR-) based, multiaxial and variable amplitude loading, stochastic-based, energy-based, and continuum damage mechanics methods, forecast fatigue life. This paper reviews fatigue life prediction techniques for metallic materials. An ideal fatigue life prediction model should include the main features of those already established methods, and its implementation in simulation systems could help engineers and scientists in different applications. In conclusion, LDR-based, multiaxial and variable amplitude loading, stochastic-based, continuum damage mechanics, and energy-based methods are easy, realistic, microstructure dependent, well timed, and damage connected, respectively, for the ideal prediction model.
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Lowe, Terry C. "Enhancing Fatigue Properties of Nanostructured Metals and Alloys." Advanced Materials Research 29-30 (November 2007): 117–22. http://dx.doi.org/10.4028/www.scientific.net/amr.29-30.117.

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Recent research on the fatigue properties of nanostructured metals and alloys has shown that they generally possess superior high cycle fatigue performance due largely to improved resistance to crack initiation. However, this advantage is not consistent for all nanostructured metals, nor does it extend to low cycle fatigue. Since nanostructures are designed and controlled at the approximately the same size scale as the defects that influence crack initiation attention to preexisting nanoscale defects is critical for enhancing fatigue life. This paper builds on the state of knowledge of fatigue in nanostructured metals and proposes an approach to understand and improve fatigue life using existing experimental and computational methods for nanostructure design.
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Polák, Jaroslav, Jiří Man, and Ivo Kuběna. "The True Shape of Persistent Slip Markings in Fatigued Metals." Key Engineering Materials 592-593 (November 2013): 781–84. http://dx.doi.org/10.4028/www.scientific.net/kem.592-593.781.

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Persistent slip markings (PSMs) were experimentally studied in 316L steel fatigued to early stages of the fatigue life. High resolution SEM, combined with focused ion beam (FIB) technique and atomic force microscopy (AFM) were used to assess the true shape of PSMs in their early stage of development. General features of PSMs in fatigued metals are extrusions and intrusions. Their characteristic features were determined. They were discussed in relation with the theories of surface relief formation and fatigue crack initiation based on the formation, migration and annihilation of point defects in the bands of intensive cyclic slip - persistent slip bands (PSBs)
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Itoh, Y. Z., and H. Kashiwaya. "Low-Cycle Fatigue Properties of Steels and Their Weld Metals." Journal of Engineering Materials and Technology 111, no. 4 (October 1, 1989): 431–37. http://dx.doi.org/10.1115/1.3226491.

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Completely reversed, strain-controlled, low-cycle fatigue behavior at room temperature is investigated for steels and their weld metals. Weld metal specimens were taken from multi-pass weld metal deposited by shield metal arc welding (SMAW) and gas metal arc welding (GMAW), such that their gage length consisted entirely of the weld metal. Results indicate that there is a trend toward reduction in the low-cycle fatigue life of weld metals as compared with the base metals. In low carbon steel weld metals, the tendency described above is explained in terms of local plastic strain concentration by lack of uniformity of the multi-pass weld metals. The weld metals do not have the same mechanical properties anywhere as confirmed by hardness distribution, and the fatigue crack grows preferentially through the temper softened region in the multi-pass welds. In Type 308 stainless steel weld metals, the ductility reduction causes reductions in low-cycle fatigue life. This study leads to the conclusion that fairly accurate estimates of the low-cycle fatigue life of weld metals can be obtained using Manson’s universal slope method. However, life estimates of the Type 304 stainless steel is difficult due to a lack of ductility caused by a deformation-induced martensitic transformation.
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Soyama, Hitoshi, Michela Simoncini, and Marcello Cabibbo. "Effect of Cavitation Peening on Fatigue Properties in Friction Stir Welded Aluminum Alloy AA5754." Metals 11, no. 1 (December 30, 2020): 59. http://dx.doi.org/10.3390/met11010059.

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Friction stir welding (FSW) is an attractive solid-state joining technique for lightweight metals; however, fatigue properties of FSWed metals are lower than those of bulk metals. A novel mechanical surface treatment using cavitation impact, i.e., cavitation peening, can improve fatigue life and strength by introducing compressive residual stress into the FSWed part. To demonstrate the enhancement of fatigue properties of FSWed metal sheet by cavitation peening, aluminum alloy AA5754 sheet jointed by FSW was treated by cavitation peening using cavitating jet in air and water and tested by a plane bending fatigue test. The surface residual stress of the FSWed part was also evaluated by an X-ray diffraction method. It was concluded that the fatigue life and strength of FSWed specimen were improved by cavitation peening. Whereas the fatigue life at σa = 150 MPa of FSWed specimen was about 1/20 of the bulk sheet, cavitation peening was able to extend the fatigue life of the non-peened FSW specimen by 3.6 times by introducing compressive residual stress into the FSWed part. This is the first paper to demonstrate the improvement of fatigue properties of FSWed metallic sheet by cavitation peening.
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Fan, Yusong, Xiaolu Gui, Miao Liu, Xi Wang, Chun Feng, and Guhui Gao. "High-Cycle Fatigue Life and Strength Prediction for Medium-Carbon Bainitic Steels." Metals 12, no. 5 (May 17, 2022): 856. http://dx.doi.org/10.3390/met12050856.

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High-cycle fatigue (HCF) behaviors of medium-carbon bainitic steels with various inclusion sizes and microstructural features were studied using the rotating–bending fatigue test. Here, the medium-carbon bainitic steels with different melting processes were treated by three heat treatment routes incorporating bainite formation, namely bainite-based quenching plus partitioning (BQ&P), bainite austempering (BAT) and “disturbed bainite austempering, DBAT”. The interior inclusion-induced crack initiation (IICI) and noninclusion-induced crack initiation (NIICI) modes were found after fatigue failure. The fracture surface of IICI is characterized by a “fish-eye” surrounding a “fine granular area, FGA” in the vicinity of an inclusion. In contrast, a microfacet, instead of an inclusion, is found at the center of FGA for the NIICI fracture surface. The predications of fatigue strength and life were performed on the two crack initiation modes based on fracture surface analysis. The results showed that a majority of fatigue life is consumed within the FGA for both the IICI and NIICI failure modes. The fatigue strength of the NIICI-fatigued samples can be conveniently predicted via the two parameters of the hardness of the sample and the size of the microfacet.
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Walther, F., and Dietmar Eifler. "Hysteresis, Temperature and Resistance Measurements for the Characterization of the Cyclic Deformation Behavior of Metals." Materials Science Forum 567-568 (December 2007): 51–56. http://dx.doi.org/10.4028/www.scientific.net/msf.567-568.51.

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Mechanical stress-strain hysteresis, temperature and electrical resistance measurements were performed for the microstructure-related characterization of the fatigue behavior and for the fatigue life calculation of metals. The proceeding fatigue damage was evaluated using the change of the load-free electrical resistance, which is strongly influenced by the defect density of the individual material state. A new test procedure was applied for the fatigue assessment under random loading on the basis of cyclic deformation curves, similar to single step loading. A physically based fatigue life calculation “PHYBAL” was developed, which requires only three fatigue tests for the rapid and nevertheless precise calculation of S-N (Woehler) and fatigue life curves.
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Dissertations / Theses on the topic "Fatigue life of metals"

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Nowicki, Timothy. "Statistical model prediction of fatigue life for diffusion bonded Inconel 600 /." Online version of thesis, 2008. http://hdl.handle.net/1850/7984.

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Erasmus, Daniel Jacobus. "The fatigue life cycle prediction of a light aircraft undercarriage." Thesis, Nelson Mandela Metropolitan University, 2010. http://hdl.handle.net/10948/1527.

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The reliability of systems relies heavily on accurate fatigue life prediction of related components. Fatigue life prediction is a complicated process requiring the correct methodology to determine accurate and reliable predictions. The Palmgren – Miner damage accumulation hypothesis is widely used in determining the fatigue life of components exposed to variable loading conditions. Modifications have been made to this hypothesis trying to achieve a greater degree of accuracy, of these the Liu – Zenner modification has been the most successful. In this report the systematic process of fatigue life prediction using the Liu – Zenner modification to achieve reliable results is calculated. A representative stress time history measured in service on the component forms the basis for defining a flight cycle which is the chosen unit in which to express the fatigue life. Rainflow cycle counting performed on the stress time history allowed the formulation of a load spectrum to which the component is exposed in one cycle. Combining the load spectrum with the developed SN curve of the component and using the Liu – Zenner modification to the Palmgren – Miner rule a reliable fatigue life in cycles is predicted.
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Heffern, Thomas V. "Probabilistic modeling and simulation of metal fatigue life prediction." Thesis, Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 2002. http://library.nps.navy.mil/uhtbin/hyperion-image/02sep%5FHeffern.pdf.

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Thesis (M.S. in Aeronautical Engineering)--Naval Postgraduate School, September 2002.
Thesis advisor(s): Ramesh Kolar, E. Roberts Wood. Includes bibliographical references (p. 113). Also available online.
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Peters, Donald Michael Dirk. "The effects of shot peening on low cycle fatigue life of 7075-T6 aluminium alloy round bar." Thesis, Nelson Mandela Metropolitan University, 2014. http://hdl.handle.net/10948/2929.

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The aim in this dissertation was to improve our understanding of the effectiveness of shot peening in prolonging fatigue life, of 7075-T6 Aluminium Alloy round bar, taking into consideration surface residual stress, microstructural and micro-hardness parameters. Three point bending, high stress, moderately low cycle, fatigue tests were conducted to study the effects of shot peening and associated surface residual compressive stresses on fatigue life. The influence of shot peening on the microstructure was explored, including the application of mechanical small plastic straining and surface skimming, to vary the surface residual compressive stresses and induce strain hardening. Tests were performed to measure residual stress-depth distribution, plastic straining, micro-hardness, and the microstructure analysed on scanning electron microscopy (SEM) fractographs. The Juvinall and Marshek life prediction model was used in conjunction with the Gerber equation for non-zero mean stress applications to generate a proposed life prediction model for this material which is user-friendly. The proposed life prediction model has a linear equation format with the flexibility to conservatively accommodate most of the various types, and combinations, of treatments applied in this research by the use of customised constants. The results show that there was good correlation between actual and predicted fatigue life as well as useful insights into the role of the microstructure in explaining fatigue life behaviour.
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Müller, Ruan. "Characterising the stress-life response of mechanical formed AISI-1008 steel plate components." Thesis, Nelson Mandela Metropolitan University, 2012. http://hdl.handle.net/10948/d1008102.

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The main purpose of this research project was to determine the fatigue-life behaviour of AISI 1008 sheet steel which has been mechanically formed to a radius of curvature of 120mm and then to correlate the fatigue-life behaviour to that of the parent or “as manufactured” material. During the forming process it was felt important to induce plastic strain through stretch-bending by clamping the sides of a plate sample’s (width) edges in the bending fixture before being bent by a single acting mechanical press. It was determined through actual testing that there was a decrease in fatigue-life when the mechanical formed data was compared to fatigue data of the parent material. Standard fatigue mathematical models were used to relate the actual fatigue data. Due to the material being cold formed to a radius of curvature of 120mm, residual stresses induced during the forming process played an essential role during the fatigue-life prediction calculations. The maximum relieved stress in the parent material was compressive in nature having a magnitude of 11percent of the “as manufactured” yield strength (265 MPa). For the mechanical formed material compressive residual stresses were measured on the outer surface while tensile stresses were measured on the inner surface. The difference between actual number of cycles to failure to that calculated using the standard mathematical models for the parent material, ranged between 48 percent and 18 percent and for the mechanical formed samples between 35 percent and 1percent, depending on the strain amplitude used. An important aspect of this study was to determine the criteria required for mathematical modelling of the parent material as testing occurred between the limit of proportionality and yield point. Although this aspect requires further investigation the mathematical results obtained during this study were considered to be acceptable.
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Beheshti, Milad. "Fatigue life prediction of threaded pipe connection." Thesis, Brunel University, 2017. http://bura.brunel.ac.uk/handle/2438/15588.

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In the oil and gas industry, threaded pipe connection is frequently used to connect the casing string, drill pipe strings or production and transportation risers and pipelines. The connection is normally preloaded in order to maintain a sealed and secure connection while in service and avoid leakage. Tapered thread are a common connection and in order to introduce preload to the threaded connection when they are assembled a certain make-up torque is going to be applied. The make-up torque plus external loads result in a multiaxial stress distribution over the connection, where the threaded connections act as stress risers. Environment such as waves and currents cause dynamic loads acting on the pipe line and offshore structures. The weakest point in offshore structure is the pipe connection because of fatigue crack initiated in the connection's threads. Researchers and engineers developed a variety of patented threaded pipe connection which all claiming to improve a connection's fatigue life. The experimental data for patented designs, available in literature, is limited. Most published studies usually comprise experiments on a single connection type. For detailed fatigue analysis those published studies cannot be used since there is no uniformity in testing setup, loading conditions and damage detection technique exist. Moreover, current design curves in codes and standards lead to overly conservative or inaccurate results. The aim of this work is to provide a better understanding of the fatigue mechanisms of threaded pipe connections and to study the effect of different design features on a connection's fatigue life. The final goal is to formulate guidelines for new fatigue resistant connection designs. API connection is used as a reference in this study. Several modifications and design features are applied to the connection type. To simulate the effect of these modifications, a parametric 2D axisymmetric finite element model, ABAQUS is used. 2D finite element result are compared with a 3D model to prove its validity for both make-up. In addition, the results of the 2D axisymmetric simulation are validated by static strain gauge measurements during a make-up test and an axial tension test. The validated model is then used to evaluated the influence of the connection properties and design features on the threaded connection's behaviour. Test rigs were designed to perform axial fatigue experiment on two scales: the small-scale experiments on 1" (33.4 mm outer diameter) connections are performed in axial fatigue testing, the medium scale tests on 4.5" (114.3 mm) connections are carried out under axial tension for which a setup is developed. The majority of the performed fatigue tests are small scale experiments. Several modified configurations are tested. The S-N curve is constructed, so that the effect of certain configuration on the connection's fatigue life can be quantified. The local modification of the threaded connection's geometry as well as the connection's contact condition's contact conditions can have an important influence on the fatigue life of the connection. A beach marking technique is used to visualized the crack fronts at different moments during the tests so that exact crack shape can be seen during post-mortem analysis. The result shown that a crack initiates at the root of the last engaged thread of the male part of the connection, and propagates slowly over a large segment of the circumference, forming a long shallow crack. When the crack penetrates the pipe wall, it rapidly increases in size along two crack fronts. The shape of crack observed in beach mark analysis do not have a semi-elliptical shape as commonly used in fracture mechanics. A fatigue crack growth analysis that considers the crack as an annular flaw, is effective in describing the crack growth behaviour. The experimentally obtained S-N curves and the result from the finite element simulations are combined in multiaxial damage evolution law. The observed trend in fatigue lives of the configuration are explained by using the fatigue analysis. Using a connection's thread load distribution as a measure for its fatigue life is proven to be inaccurate. The main reason for this is that the load distribution is related to axial stresses over the connection. The fatigue life of a threaded connection is determined by the local multiaxial stress distribution and strain range around the root of the last engaged thread. These local conditions are not only the result of the load distribution, but they are also affected by the hoop stress introduced during make-up, which can additionally be affected by a changed connection stiffness. The multiaxial damage evolution law is used to analyse the influence of several features on a connection's fatigue life. It is not for all patented modifications that an increased fatigue life is predicted when applied to the API connection. The final conclusion reached is that, in order to optimize a fatigue resistant connection, several design features must be combined together. The thread shape can be optimized to obtained a low stress concentration factor and reduce the local strains at the thread root. The connection's global geometry and make-up conditions can be optimized to improve the load distribution over the threads and reduce local stresses and strains at the threads.
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Bennett, Valerie P. "A microscale study of small crack propagation in multiaxial fatigue." Diss., Atlanta, Ga. : Georgia Institute of Technology, 1999. http://hdl.handle.net/1853/23957.

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Willens, David C. "Improving the Fatigue Life of Cylindrical Thread Rolling Dies." Digital WPI, 2020. https://digitalcommons.wpi.edu/etd-dissertations/602.

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Thread rolling is a unique metal forming process which is commonly used to form screw threads on threaded fasteners and precision leadscrews at relatively high rates of speed. Threads are formed on a cylindrical blank by flat or cylindrical dies having the reverse form on them, which rotate and penetrate the blank simultaneously, to plastically deform it into a precise geometry. Thread rolling dies are exposed to a complex state of cyclical contact stresses that eventually cause the dies to fail by fatigue and wear. The stress state is not easily ascertained through standard analytical models due to complex geometry and process conditions. This research seeks to better understand the state of contact stresses present in cylindrical thread rolling dies as they form material, to aid in identifying and testing economical methods of improving thread rolling die fatigue life. Some work has been published on using FEA simulation software to model the thread rolling process, but no work has been published on using FEA software to analyze the stresses in thread rolling dies. DEFORM®-3D Forming Simulation Software by Scientific Forming Technologies Corporation in Columbus, Ohio was used to simulate the throughfeed thread rolling process and model the state of stresses in the dies. The results were compared to the Hertzian contact stress model and the Smith Liu equations for rolling and sliding friction. Fatigue life prediction methods involving S-N curves, surface fatigue strength, and Weibull probability distributions were tested using the simulation data against field results. An optimized die design was generated from a design of experiments simulating different die design geometry. Findings show that field failures correlate well to the DEFORM® simulation results. The Hertz model with Smith Liu equations improved correlation with the simulation. Fatigue life prediction models correlated reasonably well to field results using the simulation data for inputs. These findings can aid in selecting appropriate die materials, design parameters, and fatigue life treatments.
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Moore, Zachary Joseph. "Life modeling of notched CM247LC DS nickel-base superalloy." Thesis, Atlanta, Ga. : Georgia Institute of Technology, 2008. http://hdl.handle.net/1853/24813.

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Thesis (M. S.)--Mechanical Engineering, Georgia Institute of Technology, 2008.
Committee Chair: Dr. Richard W. Neu; Committee Member: Dr. David L. McDowell; Committee Member: Dr. W. Steven Johnson.
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Aytekin, Oguz. "Numerical And Experimental Investigation Of Fatigue Life In Deep Drawn Parts." Master's thesis, METU, 2005. http://etd.lib.metu.edu.tr/upload/12607386/index.pdf.

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Sheet metal forming has an important place among metal forming processes. As the usage of sheet metal increases, the fatigue simulation and optimization of these parts become more important. This thesis study examines the change of the fatigue life of a sheet metal part after forming. A sphere-like shape is deep drawn and change in thickness and residual stresses are analyzed. To understand the effect of residual stresses, deep drawn parts with and without residual stress tested against the fatigue failure. In parallel, the forming process is simulated with an implicit finite element method (FEM). The success of forming simulation is discussed in the study. Thickness changes and residual stresses calculated with FEM are included in computer aided fatigue analysis. The effect of thickness changes is examined with the results of FEM analysis. The effectiveness of the whole simulation process is discussed by comparing the outputs of experiments and computational analysis.
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Books on the topic "Fatigue life of metals"

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Jones, David J. Cyclic fatigue damage characteristics observed for simple loadings extended to multiaxial life prediction. Cleveland, Ohio: Lewis Research Center, 1988.

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Naman, Recho, ed. Fatigue life analyses of welded structures. London: ISTE, 2006.

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Cyclic plasticity and low cycle fatigue life of metals. Amsterdam: Elsevier, 1991.

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Zaretsky, Erwin V. Selection [of] rolling-element bearing steels for long-life application. [Washington, D.C.]: National Aeronautics and Space Administration, 1986.

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Zaretsky, Erwin V. Selection [of] rolling-element bearing steels for long-life application. [Washington, D.C.]: National Aeronautics and Space Administration, 1986.

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Zaretsky, Erwin V. Selection [of] rolling-element bearing steels for long-life application. [Washington, D.C.]: National Aeronautics and Space Administration, 1986.

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Zaretsky, Erwin V. Selection [of] rolling-element bearing steels for long-life application. [Washington, D.C.]: National Aeronautics and Space Administration, 1986.

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Halford, Gary R. Stirling engine -- available tools for long-life assessment. [Washington, DC]: National Aeronautics and Space Administration, 1991.

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Farahmand, Bahram. Fatigue and fracture mechanics of high risk parts: Application of LEFM & FMDM theory. New York: Chapman & Hall, 1997.

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S, Goel V., and American Society for Metals, eds. Fatigue life: Analysis and prediction : proceedings of the fatigue program and related papers presented at the International Conference and Exposition on Fatigue, Corrosion Cracking, Fracture Mechanics and Failure Analysis, 2-6 December, 1985, Salt Lake City, Utah, USA. [Metals Park, OH]: ASM, 1986.

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Book chapters on the topic "Fatigue life of metals"

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Milella, Pietro Paolo. "Cumulative Damage: Cycle Counting and Life Prediction." In Fatigue and Corrosion in Metals, 405–76. Milano: Springer Milan, 2012. http://dx.doi.org/10.1007/978-88-470-2336-9_8.

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Mirza, F. A., K. Liu, and X. G. Chen. "Cyclic Stress-Strain Behavior and Low Cycle Fatigue Life of AA6061 Aluminum Alloy." In Light Metals 2017, 447–52. Cham: Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-51541-0_56.

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Khatibi, Golta, Martin Lederer, Bernhard Czerny, Agnieszka Betzwar Kotas, and Brigitte Weiss. "A New Approach for Evaluation of Fatigue Life of Al Wire Bonds in Power Electronics." In Light Metals 2014, 271–77. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2014. http://dx.doi.org/10.1002/9781118888438.ch47.

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Khatibi, Golta, Martin Lederer, Bernhard Czerny, Agnieszka Betzwar Kotas, and Brigitte Weiss. "A New Approach for Evaluation of Fatigue Life of Al Wire Bonds in Power Electronics." In Light Metals 2014, 273–77. Cham: Springer International Publishing, 2014. http://dx.doi.org/10.1007/978-3-319-48144-9_47.

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Koyama, Motomichi, Hiroshi Noguchi, and Kaneaki Tsuzaki. "Microstructural Crack Tip Plasticity Controlling Small Fatigue Crack Growth." In The Plaston Concept, 213–34. Singapore: Springer Nature Singapore, 2022. http://dx.doi.org/10.1007/978-981-16-7715-1_10.

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AbstractIn this chapter, we present a metallurgical–mechanical mechanism-based strategy for the design of fatigue-resistant metals. Specifically, we elucidate the importance of the metallurgical microstructure in a mechanical singular field (crack tip). The fatigue crack growth resistance is controlled through the crack tip “plasticity”, and the effect of the associated microstructure becomes significant when the crack is “small (or short)”. More importantly, the resistance to small crack growth determines a major portion of fatigue life and strength. Therefore, the microstructural crack tip plasticity is a key breakthrough to the development of fatigue-resistant metals. As successful examples of this concept, we introduce the effects of grain refinement, martensitic transformation, strain aging, dislocation planarity enhancement, and microstructure heterogeneity on small fatigue crack growths.
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Hirao, Masahiko, and Hirotsugu Ogi. "Remaining-Life Assessment of Fatigued Metals." In EMATs for Science and Industry, 307–36. Boston, MA: Springer US, 2003. http://dx.doi.org/10.1007/978-1-4757-3743-1_16.

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Hirao, Masahiko, and Hirotsugu Ogi. "Remaining-Life Assessment of Fatigued Metals." In Electromagnetic Acoustic Transducers, 311–35. Tokyo: Springer Japan, 2016. http://dx.doi.org/10.1007/978-4-431-56036-4_16.

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Attia, Mohamed, Khaled Ragab, Mohamed Bouazara, and X. Grant Chen. "Influence of Thermal Treatment and Design Parameters on the Fatigue Life of Automotive Control Arm Fabricated from A357 Semi-solid Alloy." In Light Metals 2020, 289–96. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-36408-3_42.

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Babu, G. Dinesh, and M. Nageswara Rao. "Effect of Modified Aging Treatments on the Tensile Properties, Quality Indices and Fatigue Life of Cast Components of Aluminum Alloy 354." In Light Metals 2014, 255–60. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2014. http://dx.doi.org/10.1002/9781118888438.ch44.

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Babu, G. Dinesh, and M. Nageswara Rao. "Effect of Modified Aging Treatments on the Tensile Properties, Quality Indices and Fatigue Life of Cast Components of Aluminum Alloy 354." In Light Metals 2014, 255–60. Cham: Springer International Publishing, 2014. http://dx.doi.org/10.1007/978-3-319-48144-9_44.

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Conference papers on the topic "Fatigue life of metals"

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Xue, Yibin, Tong Li, and Frank Abdi. "Fatigue Damage Initiation Life Prediction for Heterogeneous Metals." In 54th AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conference. Reston, Virginia: American Institute of Aeronautics and Astronautics, 2013. http://dx.doi.org/10.2514/6.2013-1653.

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Nagae, Yuji, Kenji Yamamoto, and Tomomi Otani. "Evaluation Method of Creep-Fatigue Life for 316FR Weldment." In ASME 2015 Pressure Vessels and Piping Conference. American Society of Mechanical Engineers, 2015. http://dx.doi.org/10.1115/pvp2015-45513.

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The most important failure mode to be prevented is creep-fatigue at elevated temperatures in fast reactors. 316FR stainless steel is a candidate material for the reactor vessel and internal structures. A method to evaluate creep-fatigue life, based on the time fraction rule, has been already developed in base metal of 316FR stainless steel. Development of procedure in evaluating creep-fatigue life is also necessary for the weldment of 316FR stainless steel by similar fillers or 16-8-2 fillers. Compared between mechanical properties of weldment and those of base metal, strength-reduction factors for weldment have been evaluated. Strength-reduction factor for fatigue has been proposed. It is considered that strength-reduction factor for creep strength is not necessary. Creepfatigue life could be evaluated in the same way for weldments of similar fillers and 16-8-2 fillers, because a difference in mechanical properties between both filler metals is negligible. Creep-fatigue life by the time fraction rule using analytical relaxation curve for weldments were compared with experimental data, and a method to evaluate creep-fatigue life for the weldments of 316FR stainless steel has been proposed.
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Pan, Dong, Fraaz Tahir, and Yongming Liu. "An equivalent crack growth model for creep fatigue life prediction of metals." In 57th AIAA/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conference. Reston, Virginia: American Institute of Aeronautics and Astronautics, 2016. http://dx.doi.org/10.2514/6.2016-0930.

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HANUSOVÁ, Patrícia, Marek ROSZAK, Peter PALČEK, and Milan UHRÍČIK. "Influence of Hydrogen Embrittlement on Fatigue Life of Titanium Endoprosthesis." In METAL 2021. TANGER Ltd., 2021. http://dx.doi.org/10.37904/metal.2021.4231.

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Prakash, Raghu V., and Anurag Jeevan Patil. "Fatigue Damage Estimation From Pseudo-Random Load Sequence Generated for Metals and Fiber Reinforced Composites." In ASME 2022 Pressure Vessels & Piping Conference. American Society of Mechanical Engineers, 2022. http://dx.doi.org/10.1115/pvp2022-85051.

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Abstract Composite materials are widely used in many applications in view of tailor suiting of properties that include stiffness, toughness, and strength. Fatigue loading of components made of composites is inevitable. The theory to predict fatigue damage and fatigue life is well established for metals, while such a clear definition is not available for composites. The damage in composite can be due to matrix cracking, delamination, fiber fracture, matrix crazing, etc. The problem is complex when one considers pseudo-random load sequences like an aircraft spectrum. This study evaluates the damage under a typical European Standard spectrum for Fighter Aircraft Loading STAndard for Fatigue and Fracture (FALSTAFF) as well as its programmed version. The phenomenological model proposed by Broutman and Sahu and empirical models proposed by Palmgren-Miner; Bond and Farrow; and Hashin-Rotem are used for calculating damage and fatigue life. Constant life diagrams are used for calculating the number of cycles to failure. The Range-Damage-Exceedance curve is employed to omit cycles from the FALSTAFF load sequence. It is observed that the Programmed FALSTAFF load sequence derived for metals is applicable for composites as both the full FALSTAFF spectrum and programmed version provide similar damage estimates. An increase in reference stress resulted in a decrease in fatigue life. Hashin-Rotem model is used to study sequence effect from the Programmed version of FALSTAFF. It is estimated that fatigue life under low-high load sequence is more as compared to high-low load sequence.
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Rout, Cameron, James Mihell, Keith Adams, and Nathan Len. "Reliability Life Span of Fatigue Cracks." In 2010 8th International Pipeline Conference. ASMEDC, 2010. http://dx.doi.org/10.1115/ipc2010-31633.

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Reliability analysis has become widely used as a method of accounting for uncertainty in the sizing of metal loss features in pipeline integrity management programs. As inline inspection (ILI) technology for crack detection becomes more widely available, the opportunity to use reliability methods in a manner similar to that already adopted for metal loss features presents itself. Nevertheless, the technical challenges to the application of reliability analysis of cracks are distinct from those that are relevant to the reliability analysis of metal loss features. Calculating the time-dependent threat of failure due to fatigue or corrosion fatigue must address different parameters than it would for metal loss features, and consequently this presents new challenges in developing statistical analysis tools. Such challenges include predicting operational pressure cycling, accounting for uncertainty in ILI crack sizing, and characterizing crack growth behaviour type. This paper provides an overview of some important parameters to be considered in reliability-based fatigue or corrosion fatigue analysis with some examples of how they have been addressed in work to date by Dynamic Risk Assessment Systems, Inc.
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Halford, Gary R. "MMC Ring Fatigue and Fracture Life Prediction: An Engineering Model." In ASME 1993 Design Technical Conferences. American Society of Mechanical Engineers, 1993. http://dx.doi.org/10.1115/detc1993-0084.

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Abstract The framework of an engineering creep-fatigue durability model has been adapted for use in estimating the radial static burst pressure and cyclic low-cycle fatigue macro-crack initiation resistance of continuous fiber reinforced (CFR) metal matrix composite (MMC) rings for application at 800 °F. Rings of circumfrentially wrapped SCS6/Ti-15-3 were manufactured by Textron Specialty Metals and burst tested by Pratt & Whitney as a part of a cooperative program with the NASA Lewis Research Center. Fatigue tests have as yet to be performed. The engineering model is based on a 3-D elasto-plastic micromechanics analysis of the tensile-loaded composite architecture. Use is made of the rule of mixtures, strain compatibility, equilibrium, and the stress-strain relationships of the constituents. Knowledge is required of the mechanical and fatigue properties of the matrix and fibers and how the presence of each affects the sharing of imposed stresses and strains. The model addresses specific issues such as residual fabrication stresses, inelastic deformation within the ductile matrix, multiaxial constraint imposed on the matrix, cyclic relaxation of both residual and applied mean stresses in the matrix, fatigue micro-crack initiation and propagation in the matrix, and tensile fracture of both the ductile matrix and the brittle fibers. In the current application of the model, the specific issues were empirically calibrated through use of tensile and tension-tension fatigue coupons that had been subjected to essentially identical loading as the rings.
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ŠPIRIT, Zbyněk, Jan KAUFMAN, Josef STREJCIUS, Michal CHOCHOLOUŠEK, and Josef KOTT. "Influence of Laser Shock Peening on Residual stress and Fatigue life of stainless steels." In METAL 2019. TANGER Ltd., 2019. http://dx.doi.org/10.37904/metal.2019.887.

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Stelmar, Scott. "Cyclic Fatigue in Metal Bellows." In ASME 2013 Pressure Vessels and Piping Conference. American Society of Mechanical Engineers, 2013. http://dx.doi.org/10.1115/pvp2013-97026.

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Engineers who encounter the need for metal bellows expansion joints in piping and heat exchangers are often challenged by cyclic fatigue life calculation methods. ASME has published formulas for predicting low cycle fatigue life of metal bellows. Both B31.3 Appendix X and BPVC VIII Appendix 26 are similar in their approach, but are based on a data set generated in 1986 that produces excessively conservative results. Since that time, members of the Expansion Joint Manufacturers Association and others have provided additional data sets that allow further extension and accuracy of formulaic methods for calculating fatigue life. Additionally the experiments were designed to allow discrimination by various metal classes identifying superior alloys for bellows element performance. Major corrections are possible that will allow increased confidence and economy of design for those engineers that must adhere to the requirements of the American Codes.
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Kwon, Y. W. "Molecular Dynamics Study of Metal Fatigue Process." In ASME 2004 International Mechanical Engineering Congress and Exposition. ASMEDC, 2004. http://dx.doi.org/10.1115/imece2004-59399.

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Molecular dynamics study was conducted to understand fatigue process in metals and to predict fatigue failure. As the first step, a pure metal like copper was considered for the study with defects at the atomic level such as vacancies or dislocations. The study was focused on identifying parameters which can provide indications of progressive damage accumulation in the material under cyclic loading. The results obtained by simulations were compared to macroscopic observations in the experimental studies
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Reports on the topic "Fatigue life of metals"

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Liu, Zhen, Zhizhen Lv, Jiao Shi, Shuangwei Hong, Huazhi Huang, and Lijiang Lv. Efficacy of traditional Chinese exercise in patients with chronic fatigue syndrome: a protocol for a systematic review and meta-analysis. INPLASY - International Platform of Registered Systematic Review and Meta-analysis Protocols, September 2022. http://dx.doi.org/10.37766/inplasy2022.9.0022.

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Review question / Objective: Chronic fatigue syndrome (CFS) is a disease in which fatigue strikes or lasts for more than 6 months, accompanied by pain, sleep disturbance, anxiety, and depression. Moreover, it brings a heavy economic burden to society. Traditional Chinese exercises (TCEs) are a traditional Chinese medical treatment and have good efficacy on CFS, therefore, this systematic evaluation is to accurately evaluate the efficacy of TCEs on CFS. P: Patients with chronic fatigue syndrome. I: Traditional Chinese exercises. C: conventional exercise, acupuncture, physiotherapy, and other physical therapy methods. O: quality of life, fatigue, pain, sleep, anxiety, and depression. S: randomized controlled trials. Condition being studied: Chronic fatigue syndrome (CFS) is a disease in which fatigue strikes or lasts for more than 6 months, accompanied by pain, sleep disturbance, anxiety, and depression. Moreover, it brings a heavy economic burden to society. Traditional Chinese exercises (TCEs) are a traditional Chinese medical treatment and have good efficacy on CFS. Therefore, this systematic evaluation is to accurately evaluate the efficacy of TCEs on CFS, to provide an alternative therapy for clinical treatment of CFS.
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Zhang, Fan, Liuyan Huang, Hui Wang, Yan Bai, Xing Zhao, and Huachun Zhang. The impact of exercise intervention for patients undergoing hemodialysis on fatigue and quality of life: A systematic review and meta-analysis. INPLASY - International Platform of Registered Systematic Review and Meta-analysis Protocols, May 2020. http://dx.doi.org/10.37766/inplasy2020.5.0071.

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Chen, Ziying, Zefei Jiang, Ziyun Guo, Mengchao Wang, Zhen Wang, and Liwei Chen. Comparative efficacy of different types of acupuncture for cancer-related fatigue: a protocol for systematic review and network meta-analysis. INPLASY - International Platform of Registered Systematic Review and Meta-analysis Protocols, July 2022. http://dx.doi.org/10.37766/inplasy2022.7.0012.

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Review question / Objective: To evaluate the efficacy and safety of all current acupuncture therapies for the treatment of CRF through network meta-analysis. Condition being studied: Cancer-related fatigue (CRF) has been defined as a distressing, persistent, subjective sense of physical, emotional, and/or cognitive tiredness or exhaustion related to cancer and/or cancer treatment that is not proportional to recent activity and interferes with usual functioning, as one of the most common symptoms in cancer and related therapies, presents a huge challenge to the quality of life for cancer patients. Unlike general fatigue that can be relieved with rest, CRF is more debilitating, more persistent, and manifests itself in various ways, both physically and mentally. The estimated prevalence of CRF varies widely by various fatigue evaluation indicators, types of cancer, and cancer treatments, ranging from 14.03% to 100%, however, the latest systematic review show that it can have a pooled prevalence of up to 52%, this deserves our attention. But there has been no gold standard treatment for CRF.
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Zhang, Linlin, Xiaoming Xi, Xihua Liu, Xinjie Qu, Qing Wang, Haihao Cao, Limin Wang, et al. Should aerobic and resistance training interventions for Multiple sclerosis be performed on the same day: A protocol for systematic review and network meta-analysis. INPLASY - International Platform of Registered Systematic Review and Meta-analysis Protocols, December 2021. http://dx.doi.org/10.37766/inplasy2021.12.0126.

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Review question / Objective: P (Population) : patients diagnosed with multiple sclerosis; I (Intervention) : aerobic training and resistance training; C (Comparison) : the efficacy and safety were compared on the same day and different days; O (Outcome) : Evaluates dysfunction, quality of life, fatigue, aerobic capacity or muscle function, mood, cognition, and safety. S (Study Design) : Systematic review and Network meta-analysis. Eligibility criteria: Measures in the intervention group: aerobic training (taijiquan, Baduanjin, qigong, yoga, swimming, cycling, jogging, brisk walking, etc.) and resistance training were used simultaneously, including studies conducted on the same day and on different days. There are no restrictions on training time, frequency and intensity.Control group measures: no intervention or conventional treatment.
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Ly, Lena, Jennifer Philip, Peter Hudson, and Natasha Smallwood. Singing for people with advance chronic respiratory diseases: a qualitative meta-synthesis. INPLASY - International Platform of Registered Systematic Review and Meta-analysis Protocols, August 2022. http://dx.doi.org/10.37766/inplasy2022.8.0017.

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Review question / Objective: This study undertook a meta-synthesis of qualitative data with the aim of collating, synthesizing, and evaluating the current evidence regarding the experiences of singing for people with advanced chronic respiratory disease. Condition being studied: Advanced respiratory illnesses are disorders that impact the airways and other structures of the lung. People with lung cancer, chronic obstructive pulmonary disease (COPD) and interstitial lung disease (ILD) frequently experience progressive, frightening breathlessness, cough and fatigue, which affect their quality of life. Furthermore, people with advanced chronic respiratory disease (CRD) and their carers experience a high prevalence of loneliness and uncertainty, especially if breathlessness is felt to herald death and thus, require both psychological and practical supportive care to cope with their symptoms.
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Solomon, H. D., V. Brzozowski, and D. G. Thompson. Prediction of Solder Joint Fatigue Life. Fort Belvoir, VA: Defense Technical Information Center, April 1988. http://dx.doi.org/10.21236/ada204335.

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Farkas, Diana. Atomistic Mechanisms of Fatigue in Nanocrystalline Metals. Fort Belvoir, VA: Defense Technical Information Center, December 2004. http://dx.doi.org/10.21236/ada438940.

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Gallagher, J. P., R. H. van Stone, R. E. deLaneuville, P. Gravett, and R. S. Bellows. Improved High-Cycle Fatigue (HCF) Life Prediction. Fort Belvoir, VA: Defense Technical Information Center, January 2001. http://dx.doi.org/10.21236/ada408467.

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Miyazaki, Takao, Hiroshi Kagaya, Takayuki Nishino, Nobutaka Murakami, Yuji Torigoe, and Masahiro Ikeda. Prediction of Cylinder Head Thermal Fatigue Life. Warrendale, PA: SAE International, September 2005. http://dx.doi.org/10.4271/2005-08-0533.

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Chen, P. C., and Marc P. Mignolet. Fatigue Life of Composite Structures in Extreme Environments. Fort Belvoir, VA: Defense Technical Information Center, June 2005. http://dx.doi.org/10.21236/ada436116.

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