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Showing 1 to 16 of 16 for “"S–N curve"”.
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Auswertealgorithmus auf der Basis einer Modifikation des Goniometrischen Modells zur stetigen Beschreibung der Wöhlerkurve vom Low-Cycle-Fatigue- bis in den Ultra-High-Cycle-Fatigue-Bereich
… In the end, a non-linear and steady S-N curve has to be the basis for a suitable evaluation model containing the S-N field in its entity. In this work, a flexible algorithm based on the Modified Goniometric Model (MGM) is generated, tested and proven capable for practice. Not only the S-N …
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Fatigue analysis for non-normal stochastic stress
… narrow-band process with the exponent in the S-N curve limited to integer values. The effect of non-normality on the empirical rainflow results (for any bandwidth process) is shown to be approximately the same as the effect predicted theoretically for the corresponding narrow-band process. A …
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Quasi-Static and Fatigue Evaluation of Pultruded Vinyl Ester/E-Glass Composites
… reduction, and residual strength. Measured S-N curves and residual strength curves compared with literature were found most like woven fabric laminates, well below aerospace grade laminates. Residual strength and life analysis using Reifsnider's methodology [43], revealed that the choice of …
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Development of a multiple-specimen, reversed-flexure fatigue tester and its application to the testing of titanium sheet
… and results are presented in the form of an S-N curve including data for the rolling and transverse directions. These data were analyzed statistically and compared with the results of previous investigations of this type material."--Introduction.
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Optimization of Rib-To-Deck Welds for Steel Orthotropic Bridge Decks
… cycles were recorded for the following S-N curve analysis. Finite element analysis was performed to determine the stress state on the fatigue cracking locations. Special considerations were made for the application of hot-spot stress methodology, which post-processes the FEA results to …
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A study of the damage accumulation process in poly(aryl ether ketone ketone) and its AS4 carbon fiber reinforced composites
… has then been used to predict the fatigue S-N curve in stroke control and to qualitatively relate it to the available fatigue data in stress control.
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Post-Injection Welded Joint Fatigue Tests of Sandwich Plate System Panels
… predictions were made using code based S-N curves, and a relatively new mesh-insensitive structural stress method with a master S-N curve approach. The post-injection welded joint demonstrated good fatigue resistance to recommended AASHTO loading when shims were used under the middle support …
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An investigation of the high cycle fatigue behavior of bovine trabecular bone
… by a stress plateau in the stress-life (S-N) curve. When loaded to levels below the stress plateau, these materials have an infinite fatigue life. Other materials, such as aluminum, do not exhibit a fatigue limit. For these materials, the endurance limit is defined as the stress amplitude …
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Sandwich Plate System Bridge Deck Tests
… class of the weld was determined and an S-N curve was created for the longitudinal weld group. Finally, a series of experiments was performed on a half scale continuous bridge deck specimen. The maximum positive and negative flexural bending moments were calculated and the torsional …
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Fatigue life and mechanical behaviour of aluminium alloy aa6061 chips prepared by hot extrusion process
… three different cases was indicated by the S-N curve. The research successful demonstrated that the fatigue life endurance and mechanical properties of directly recycled aluminium alloy AA6061 chips can be improved about 28 % through the heat treatment. The preheating temperature was the key …
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Stress intensity factors for ship and offshore structural details
… components has been based on the classical S-N curve. The empiricism of this approach has led to the exploration of recently developed disciplines, fracture mechanics and low cycle fatigue, to develop methods for more rational and accurate analyses. The objective of the current study is, …
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Characterization of bending fatigue mini-specimens for nuclear materials
… of the mini-specimen. Consequently, the S-N curve for both HT9 and Incoloy alloy MA956 were defined. The endurance limits were measured to be 94 MPa for HT9 and 132 MPa for Incoloy alloy MA956. The finite element model code ABAQUS was used to estimate the level of stress in the bent mini …
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Weight-optimised steel catenary risers and their applications in harsh deepwater environment
… analysis results by using specified bilinear S-N curve and rainflow cycle counting. Fatigue analysis results showed that the deepwater SCR with weight-optimised coating can meet the service life requirement. This suggested that weight-optimised coating as a mitigation method for deepwater SCR was …
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The development of an interpretive methodology for the application of real-time acousto-ultrasonic NDE technique for monitoring damage in ceramic composites under dynamic loads
… under static and fatigue loading. An S-N curve was generated for a cross-ply SiC/CAS ceramic composite material. The AU results are corroborated and complemented by other NDE techniques, namely, in-situ optical microscope video recordings and edge replication.
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Quantification of fatigue damage in AISI 316L stainless steel using X-Ray powder diffraction (XRD)
… The initial step included plotting an S-N curve for the AISI316L material in the material annealed state following fatigue testing in the INSTRON machine. A specific stress level was selected to ensure sufficient data retrieval prior to point of failure for the material specimen. Thereafter …
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Pokročilé vyhodnocení únavové odolnosti u vybraných stavebních materiálů
Práce se zabývá analýzou křivek životnosti (S–N křivek) modelů podle Basquina, Kohouta a Věcheta a Castilla–Canteliho s použitím Weibullova a Gumbelova řešení. Tyto křivky jsou proloženy naměřenými daty cyklicky zatěžovaných běžných a nově vyvíjených stavebních materiálů: betonů a ocelí. Pro každý …