Mechanisms of stable crack growth in ductile polycarbonate

 
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1989 (EN)
Mechanisms of stable crack growth in ductile polycarbonate (EN)

Kytopoulos, V (EN)
Theocaris, PS (EN)

N/A (EN)

An extensive study of the phenomena appearing during crack propagation in ductile polycarbonate during the phase of stable crack growth (SCG) was undertaken. It has been shown that this phase starts at a critical loading step where a blunted crack was established and a damaged ligament in front of the crack tip developed and stabilized. This phase may be divided into two successive steps. The first is characterized by the step by step advancement of the blunted crack by exhausting respective parts of the damaged ligament so that the overall length of crack and ligament remains stationary. In this step the crack tip opening angle is increasing and attains its final value of the order of 55 degrees. This progressive crack growth, at the expense of the damaged ligament, is replaced by the proper steady crack growth where the crack advances steadily under almost constant external load and under constant CTOA up to a limit where catastrophic fracture occurs. The influence of the in-plane and transverse constraint factors was studied and important results concerning the mechanisms of fracture under predominating plane-stress or plane-strain conditions were established. © 1989 Chapman and Hall Ltd. (EN)

journalArticle

Stresses (EN)
Crack Growth (EN)
Crack Propagation (EN)
Critical Loads (EN)
Stable Crack Growth (EN)
Crack Tip Opening Angle (EN)
Polycarbonates (EN)

Εθνικό Μετσόβιο Πολυτεχνείο (EL)
National Technical University of Athens (EN)

Journal of Materials Science (EN)

1989


Kluwer Academic Publishers (EN)



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