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THE INTRODUCTION OF FATIGUE LOADING INTO THE ROUTINE TESTING OF POLYETHYLENE GAS PIPE SYSTEMS
Author(s) -
Lawrence C.,
Sumner C.
Publication year - 1989
Publication title -
fatigue and fracture of engineering materials and structures
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.887
H-Index - 84
eISSN - 1460-2695
pISSN - 8756-758X
DOI - 10.1111/j.1460-2695.1989.tb00551.x
Subject(s) - work (physics) , service life , term (time) , structural engineering , polyethylene , engineering , fatigue testing , test (biology) , reliability engineering , forensic engineering , materials science , mechanical engineering , composite material , geology , physics , quantum mechanics , paleontology
— —This paper discusses a programme of work instigated to establish the feasibility of introducing dynamic loading into the routine quality control testing of plastic gas pipe and fittings. The initial data proved to be exceptionally consistent and showed that fatigue loading reduced the time to failure with comparable static loading by an order of magnitude at least and provided a real opportunity to get short term data that would relate to long term (50 to 60 years) service life. The work showed also that many parameters markedly affect failure times and that these would have to be closely controlled or optimised in any subsequent test procedure. As an example the effects of frequency are illustrated and a method of selecting the optimum test frequency is given.