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Showing 1 to 19 of 19 for “"Creep-Fatigue"”.
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Damorheology: creep-fatigue interaction in composite materials
… material behavior and cyclic damage during fatigue loading of fiber reinforced composite laminates. A new term 'damorheology' has been coined to describe such physical behavior. The lamina has been chosen as the building block and a cross ply laminate configuration was the selected test …
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Creep-Fatigue Interaction of Notched 304 Stainless Steel Bars
… steel specimens were subjected to constant load creep, cyclic loading with hold-time and fatigue loadings at 650(DEGREES)C to determine the lives, failure modes and to understand creep-fatigue interaction mechanisms. The hold-times are one minute and ten minutes. Double-notch specimens were used …
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Creep-Fatigue-Environment Interaction in a Bainitic 2.25CR-1MO Steel
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High temperature creep-fatigue behavior of alloy 617 and alloy 230
… materials used in the VHTR is predicted to be creep-fatigue damage, which arises due to startup and shutdown or power transients during normal operation. The mechanism of synergic interaction between creep and fatigue is not well understood and there are no effective modeling methods for …
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Origin of Creep-Fatigue Back Stress and its Effect on Deformation and Damage
Creep deformation of metals operating at a high temperature in electricity generation plant can limit the lifetime of components and pressurized systems. Assessment of a structure’s creep life under power plant operation conditions is a complex problem due to materials being exposed to cyclic load …
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Creep, fatigue, and environmental response of Alloy 800H tested at 900 degrees C
Creep and creep rupture studies have been carried out at 900$\sp\circ$C in lab air and in vacuum on Alloy 800H. Three different notch acuities were chosen so that the effect of stress intensity on the rupture lifetimes could be examined. The effect of oxidation on the creep rupture lifetimes has …
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Creep-fatigue interaction in a low alloy bainitic steel and an austenitic stainless steel
Restriction data tranferred 2014-07-01T11:31:50-05:00 Original Data Group with Access UIUC Users [automated] Release Date: none Reason: ETDs are only available to UIUC Users without author permission
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3D characterization of oxidation and crack propagation in Inconel 617 fatigue and creep-fatigue tests
Includes bibliographical references (pages 64-69).
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Determination of creep, fatigue and ageing characteristics of non-metallic strength members in optical communication cables
Innovative tensile, creep, fatigue, environmental weathering and ageing test methods have been developed to compare the ultimate and relative performances of four commercial brands of non-metallic continuous multi fibre strength member yarns, and one jointed non-metallic multi fibre strength member …
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Fatigue and Fracture Behavior of High Strength and High Conductivity Copper Alloys for High Heat Flux Applications
The fatigue performance of CuAl25 and CuCrZr and OFHC copper was also evaluated under creep-fatigue loading conditions. It was found that creep and stress relaxation have a major impact on fatigue behavior. Fatigue lives were reduced notably with hold time even at room temperature. Hold times are …
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Structural integrity assessment of engineering components under cyclic loading at high temperature
… but cause severe structural problems due to creep, fatigue, creep-fatigue failure mechanisms. Hence, performing structural integrity assessment accurately and developing effective assessment methods are vital tasks in these industries.;In order to contribute to the research field of the high …
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Hot section components life usage analyses for industrial gas turbines
… turbine blades are prone to failure due to creep. In some cases, plants are frequently shut down, thus, in addition to creep low cycle fatigue failure equally sets in. Avoiding failure calls for proper monitoring of how the lives of these components are being consumed. Efforts are thus being …
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Study of photovoltaic (PV) module interconnections failure analysis and reliability
… model to determine the number of cycles to creep-fatigue failure, and then it defined a new generic exponent factor using the Coffin–Manson–Arrhenius model to estimate the lifetime for the designs under different thermal cycling conditions. The research also combines the numerical results of …
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Study on structural integrity of welded components using the LMM
… on the investigation of cyclic plasticity and creep-cyclic plasticity interaction of welded components, and the consequential damage assessment using the Linear Matching Method (LMM). Firstly, a numerical investigation and parametric study on the cyclic plasticity behaviour of a butt-welded …
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Feasibility of Using Oxide Thickness Measurements for Predicting Crack Growth Rates in P91 Steel Components
… layer thickness on the fracture surfaces of creep-fatigue crack growth</p> <p>samples tested as part of a previous study where the crack growth rates were measured. These</p> <p>reported measurements are used to compare with the predicted crack growth rates from the</p> <p>analytical models …
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Transient boiler heat exchanger thermal behaviour analysis
… decades are aging. The main aging mechanisms are creep and thermal fatigue. Creep results from the high temperatures at which the components operate. Thermal fatigue is due to thermal stresses and these stresses result from temperature gradients within the material. Cycling of these thermal …
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Thermo-elastic-plastic analysis for elastic component under high temperature fatigue crack growth rate.
… presents a fundamental understanding of the fatigue crack growth mechanisms of AISI 420 martensitic stainless steel, based on the comparison analysis between the theoretical and numerical modelling, incorporating research findings under isothermal fatigue loading for solid cylindrical …
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Microstructure-based modeling of damage and healing in salt rock with application to geological storage
… of CDM with fabric descriptors. We carried out creep tests on granular salt to infer the form of fabric tensors from microstructure observation. Net damage evolution is governed by a diffusion equation. Macroscopic and microscopic model predictions highlight the increased efficiency of healing …
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Tensile, Creep, and Fatigue Behaviors of Thermoplastics Including Thickness, Mold Flow Direction, Mean Stress, Temperature, and Loading Rate Effects
… to evaluate and quantify the tensile, creep, and fatigue behaviors of two thermoplastic polymers. The effects considered in this experimental study include mold flow direction, thickness, mean stress, temperature, and loading rate. Specimens were subjected to monotonic tension, creep, …