Additional Information - Posters # 1995 Edinburgh
Department of Manufacturing Enginineering and Design. University of East London, Dagenham Essex. RM8 2AS. UK. Abstract The phenomenon of rapid crack propagation in a pre-notched plastic pipes that are filled or partially filled with pressurised pas has now k e n incorporated into an indostrial requirement typically I S 0 DIS 13478. Tim paper outlines the factors that determine the sinusoidal hehaviour observed in the fast fracture plastic pipes. Thu; paper contends that t h ~ s test arrangement does not preclude an element of chance, which detracts from the efficacy of the method. However, base upon the argument it proposes withm the paper, it proposes a method whereby the conformation of the resultant failure may be predetermined, thus making laboratory findings much more consistent. The paper is purely theoretical in nature and is predicated on the thesis that the pipe behaves as if the pipe under test possesses a rigid backbone, remote ftom the initiation site. However, it does offer high speed photography of a very much less mechanically "stW s)stem, which suppons this hasic contention.