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Development of Notched Ring Test for Measuring Slow Crack Growth

 

Material Science SCG # 2006 Washington DC

A novel Notched Ring Test (NRT) method for measuring slow crack growth (SCG) in plastics pipes and fittings is developed and applied to determine its applicability as the standard test method. NRT specimen in the form of a notched full ring, directly obtained from the extruded pipe or injection molded fitting is subjected to a three point bend loading has demonstrated its effectiveness in generating slow crack growth in a time frame of order of magnitude shorter than the currently available methods. Details of NRT method in terms of test implementation, its SCG performance and the stress intensity factor approach to SCG evaluation are presented. Corresponding Author : swchoi@hannam.ac.kr

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