Craze and Crack Growths in Polycarbonate

Craze initiation in glassy polymers

In this work a method is presented that can be used to predict craze initiation in glassy polymers. The approach is based on the view that the development of a craze is preceded by de formation of a localised plastic deformation zone. As this zone develops, the hydrostatic stress increases, and, when exceeding a critical stress level, cavitation will take place, leading to local development of ...

Craze-Initiation Kinetics in Polystyrene

In this study it is shown, for a commercial polystyrene grade, that the strain-rate dependence of craze initiation is equivalent to that of yielding. This implies that the kinetics of craze initiation are determined by the nonlinear flow behavior, and that the actual cavitation process is governed by an additional, apparently rateindependent, criterion. © 2004 Wiley Periodicals, Inc. J Polym Sc...

Renal Growths

pathological aspect of the subject; though this naturally occupies the greater part of the book, the clinical aspect is fully considered, and even the operative treatment exhaustively discussed. At the present time there is a good deal of confusion about the classification of renal tumours?so many varieties are now recognised?and the reader must not expect to gain a perfectly clear knowledge of...

Keloid Growths Following Vaccination

Osseous New Growths