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The effect of shallow cracks on crack tip opening displacement

✍ Scribed by G. Matsoukas; B. Cotterell; Y.-W. Mai

Publisher
Elsevier Science
Year
1986
Tongue
English
Weight
441 KB
Volume
24
Category
Article
ISSN
0013-7944

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✦ Synopsis

Further resuhs given in the present paper confnm that shallow cracks have larger crack tip opening disp~a~en~ at initiation than deep cracks. This difference in behaviour is shown to be principally caused by the different hydrostatic stresses existing at the tips of shallow and deep cracks. A new method based on lateral crack growth across the thickness is used in this work to measure crack tip opening displacements in specimens containing machined slots rather than fatigue pre-cracks. Justification and advantages of this method are discussed and compared to the conventional technique.

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