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I have read some papers about fracture mechanics of functionally graded materials. I find there are different results for the stress intensity factors when the crack length is close to "0" . In some papers the values of stress intensity factors are "1" when the crack length is close to "0" , but in other papers the values of stress intensity factors are not "1". I obtain the stress intensity factors is "1" when the length of crack is close to "0". I hope to get the explaination about the results.Thanks a lot.

Hiya,

I have different stress strain curves at different hours (1hr, 10hr, 100hr).  for a constant stress, the strain increases with increase in number of hours(creep)

They look like stress-strain curves at different strain rates.

now I want to define a material card with these curves with above mentioned number of hours.

I kindly request you to suggest me a CARD in ABAQUS which takes care of this behavior.

Thanks a ton for your help, in advance !

-Balappa.

Saint-Venant's Principle is important in the theory and application of elasticity and its proof or formulation is a major attraction  for authors. Among others，Toupin's Theorem plays  the most influential  role in the history of  development  concerning Saint-Venant's Principle.

A postdoctoral position is available starting June 1^st within the School of Civil and Environmental Engineering at Cornell University. The project entails an investigation of the key features associated with ductile fracture in aluminum alloys.  The investigation will utilize a concurrent discrete-dislocation atomistic simulation framework and will likely