Ebook: Mechanics of Fracture Initiation and Propagation: Surface and volume energy density applied as failure criterion
Author: G. C. Sih (auth.)
- Tags: Mechanics, Automotive Engineering, Civil Engineering, Characterization and Evaluation of Materials
- Series: Engineering Applications of Fracture Mechanics 11
- Year: 1991
- Publisher: Springer Netherlands
- Edition: 1
- Language: English
- pdf
The assessment of crack initiation and/or propagation has been the subject of many past discussions on fracture mechanics. Depending on how the chosen failure criterion is combined with the solution of a particular theory of continuum mechanics, the outcome could vary over a wide range. Mod elling of the material damage process could be elusive if the scale level of observation is left undefined. The specification of physical dimension alone is not sufficient because time and temperature also play an intimate role. It is only when the latter two variables are fixed that failure predictions can be simplified. The sudden fracture of material with a pre-existing crack is a case in point. Barring changes in the local temperature,* the energy released to create a unit surface area of an existing crack can be obtained by considering the change in elastic energy of the system before and after crack extension. Such a quantity has been referred to as the critical energy release rate, G e, or stress intensity factor, K Ie. Other parameters, such as the crack opening displacement (COD), path-independent J-integral, etc. , have been proposed; their relation to the fracture process is also based on the energy release concept. These one-parameter approaches, however, are unable simultaneously to account for the failure process of crack initiation, propagation and onset of rapid fracture. A review on the use of G, K I, COD, J, etc. , has been made by Sih [1,2].
Content:
Front Matter....Pages i-xxii
A special theory of crack propagation....Pages 1-22
A three-dimensional strain energy density factor theory of crack propagation....Pages 23-56
Strain energy density theory applied to plate-bending and shell problems....Pages 57-98
Dynamic crack problems — strain energy density fracture theory....Pages 99-125
Strain energy density and surface layer energy for blunt cracks or notches....Pages 126-181
Thermoelastic and hygrothermoelastic behavior of cracks....Pages 182-212
Failure of composites as predicted by the strain energy density theory....Pages 213-270
Experimental fracture mechanics: strain energy density criterion....Pages 271-306
Isoenergy density theory: exchange of surface and volume energy....Pages 307-403
Back Matter....Pages 405-410
Content:
Front Matter....Pages i-xxii
A special theory of crack propagation....Pages 1-22
A three-dimensional strain energy density factor theory of crack propagation....Pages 23-56
Strain energy density theory applied to plate-bending and shell problems....Pages 57-98
Dynamic crack problems — strain energy density fracture theory....Pages 99-125
Strain energy density and surface layer energy for blunt cracks or notches....Pages 126-181
Thermoelastic and hygrothermoelastic behavior of cracks....Pages 182-212
Failure of composites as predicted by the strain energy density theory....Pages 213-270
Experimental fracture mechanics: strain energy density criterion....Pages 271-306
Isoenergy density theory: exchange of surface and volume energy....Pages 307-403
Back Matter....Pages 405-410
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