Failure of components which operate in the creep range can result either from the growth of a dominant crack or through the accumulation of 'damage' in the material. Conventional and nuclear power generating plant are generally designed on the basis of continuum failure, with assessment routes providing an indication of the effects of flaws on component performance. Another example where an understanding of creep failure is important is in the design of offshore structures which operate in arctic waters. These structures can be subjected to quite considerable forces by wind-driven ice sheets, which are limited by failure of the ice sheet. Design codes are currently being developed which identify the different mechanisms of failure, ranging from continuum crushing to radial cracking and buckling of the ice sheet. Our final example concerns engineering ceramics, which are currently being considered for use in a wide range of high-temperature applications. A major problem preventing an early adoption of these materials is their brittle response at high stresses, although they can behave in a ductile manner at lower stresses. In each of the above situations an understanding of the processes of fast fracture, creep crack growth and continuum failure is required, and in particular an understanding of the material and structural features that influence the transition from brittle to ductile behaviour. The translation of this information to component design is most advanced for metallic components.
Author(s): P. B. Hirsch, S. G. Roberts, J. Samuels, P. D. Warren (auth.), A. C. F. Cocks, A. R. S. Ponter (eds.)
Edition: 1
Publisher: Springer Netherlands
Year: 1989
Language: English
Pages: 310
Tags: Characterization and Evaluation of Materials;Mechanical Engineering
Front Matter....Pages i-viii
The Brittle-To-Ductile Transition in Silicon....Pages 1-12
Stress Redistribution Effects on Creep Crack Growth....Pages 13-21
Contour Integrals For Creep Crack Growth Analysis....Pages 22-35
Modelling of Creep Crack Growth....Pages 36-49
Modelling Creep-Crack Growth Processes in Ceramic Materials....Pages 50-62
On The Growth of Cracks By Creep in The Presence of Residual Stresses....Pages 63-74
Creep Deformation of Engineering Ceramics....Pages 75-98
Statistical Mapping and Analysis of Engineering Ceramics Data....Pages 99-116
Indentation Creep in Zirconia Ceramics Between 290 K and 1073 K....Pages 117-128
Ductile Creep Cracking in Uranium Dioxide....Pages 129-140
Physical Interpretation Of Creep and Strain Recovery of a Glass Ceramic Near Glass Transition Temperature....Pages 141-151
Ice Loading on Offshore Structures: The Influence of Ice Strength....Pages 152-167
Ice Forces On Wide Structures : Field Measurements at Tarsuit Island....Pages 168-187
The Double Torsion Test Applied to Fine Grained Freshwater Columnar Ice, and Sea Ice....Pages 188-200
Ice and Steel - A Comparison of Creep and Failure....Pages 201-212
A Micromechanics Based Model for the Creep Of Ice Including the Effects of General Microcracking....Pages 213-229
Continuum Damage Mechanics Applied to Multi-Axial Cyclic Material Behaviour....Pages 230-244
Multiaxial Stress Rupture Criteria for Ferritic Steels....Pages 245-261
Segregation of Impurities in a Heat-Affected and an Intercritical Zone in an Operated 0.5 Cr 0.5 Mo 0.25 V Steel....Pages 262-276
Effect of Creep Cavitation at Sliding Grain Boundaries....Pages 277-289
Creep Fracture Under Remote Shear....Pages 290-309
