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Design and Assessment for Creep-Fatigue and Creep-Fatigue Crack Growth
Volume 1B: Codes and Standards, 2016Creep-fatigue assessments require inputs for both creep damage and fatigue damage. Then these damage terms are combined using some form of interaction diagram to enable estimation of the creep-fatigue life. Similarly, creep-fatigue crack growth assessments need separate calculations of creep crack growth, fatigue crack growth and again possibly some ...
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Creep-Fatigue-Oxidation Interactions
2012The fracture maps of Ashby display the various modes of creep fracture. Creep damage results from the nucleation of cavities on grain boundaries. Viscoplastic deformation can be the controlling mechanism. Hull and Rimmer model is at the basis of diffusion controlled nucleation.
Dominique François +2 more
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Multiaxial creep-fatigue damage
Nuclear Engineering and Design, 1978Abstract This paper presents an alternative method for extending the various methods of creep-fatigue damage assessment from the uniaxial to general multiaxial regimes. Specifically, the method gives a procedure for determining a reasonable strain range in multiaxial situations where loading may not be proportional.
D.W. Lobitz, R.E. Nickel
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1994
In this chapter the main factors influencing high temperature creep—fatigue crack growth in engineering materials are discussed. The significance of minimum to maximum load ratio R, frequency, environment and temperature are considered in turn. Transgranular cycle dependent and intergranular time dependent controlled cracking processes are identified ...
G. A. Webster, R. A. Ainsworth
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In this chapter the main factors influencing high temperature creep—fatigue crack growth in engineering materials are discussed. The significance of minimum to maximum load ratio R, frequency, environment and temperature are considered in turn. Transgranular cycle dependent and intergranular time dependent controlled cracking processes are identified ...
G. A. Webster, R. A. Ainsworth
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Creep Damage and Creep-Fatigue Damage
2011A time-dependent deformation occurring in a material subject to load for a prolonged period of time is called creep. In a narrower sense, creep means a time-dependent deformation caused by a constant stress or a constant load. Materials undergoing creep for long time are often accompanied by time dependent internal deterioration.
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1987
In this chapter, the technologically important subject of fatigue at high temperatures is taken up again. In Chapter 18, fatigue failure due to more or less homogeneous cavitation of grain boundaries in the whole specimen was discussed, whereas now failure by the growth of cracks under cyclic-loading conditions will be investigated.
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In this chapter, the technologically important subject of fatigue at high temperatures is taken up again. In Chapter 18, fatigue failure due to more or less homogeneous cavitation of grain boundaries in the whole specimen was discussed, whereas now failure by the growth of cracks under cyclic-loading conditions will be investigated.
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1966
Three problems, singly or in combination, may confront the designer as he endeavours to produce components which will function reliably under rigorous conditions. These are: corrosion, fatigue and creep, of which corrosion is the most widespread, tending to occur in almost every kind of engineering structure and machine and frequently doing so with ...
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Three problems, singly or in combination, may confront the designer as he endeavours to produce components which will function reliably under rigorous conditions. These are: corrosion, fatigue and creep, of which corrosion is the most widespread, tending to occur in almost every kind of engineering structure and machine and frequently doing so with ...
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Creep/fatigue/environmental interactions
1995The cyclic behaviour of materials at high temperature is more complicated than its low-temperature equivalent, because the amplitude and the duration of the cycle both cause material damage.
R. K. Penny, D. L. Marriott
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1992
A material, component or structure is deemed to have failed when its ability to fully satisfy the original design function ceases. This may be due to a variety of causes. It may be due to fracture, either partial or complete, plastic buckling, dimensional change with time, loss of material by corrosion, erosion or abrasive wear or an alteration of ...
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A material, component or structure is deemed to have failed when its ability to fully satisfy the original design function ceases. This may be due to a variety of causes. It may be due to fracture, either partial or complete, plastic buckling, dimensional change with time, loss of material by corrosion, erosion or abrasive wear or an alteration of ...
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