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Crack extension in a material with a J-shaped stress-strain curve

✍ Scribed by E. Smith

Publisher
Elsevier Science
Year
1989
Tongue
English
Weight
457 KB
Volume
112
Category
Article
ISSN
0921-5093

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✦ Synopsis

The paper is concerned with the problem of crack extension in materials such as rubber, animal membranes or human membranes, where the stress-strain curve is J shaped, i.e. there is a low resistance to tensile deformation initially, followed by a considerably greater resistance before failure. Analysis of a very simple simulation model, which takes due account of the discreteness of the material's structure, shows that the work of fracture or effective fracture energy 7elf can be large and can be considerably greater than the value which is obtained by regarding it as the area under the force law curve, as would be the case if the material is regarded as a continuum. The theoretical predictions accord with experimental observations that 7~ff is large for a material with a J-shaped stress-strain curve.

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