caa a22 4500 469125098 CHVBK 20180323133148.0 cr unu---uuuuu 170328e19920301xx s 000 0 eng 10.1007/BF00040853 doi (NATIONALLICENCE)springer-10.1007/BF00040853 Accelerated fatigue fracture of polyethylene pipe material: crack layer analysis [Elektronische Daten] [J. Strebel, A. Moet] A fatigue accelerated pipe test method has been developed which is able to quickly differentiate pipes according to their crack propagation resistance. The differences in brittle crack propagation resistance between two pipe materials was quantified and related to the specific enthalpy of damage and the dissipation coefficient via the Crack Layer Theory. These values show that the ethylene/hexene copolymer was more resistant to brittle cracking than was the ethylene/butene copolymer, because in the latter a larger percentage of the irreversible work per cycle was expended on the fracture process. The ethylene/butene copolymer also had a smaller intrinsic toughness than did the ethylene/hexene copolymer, as manifested by its lower specific enthalpy of damage. These results agree with the kinetics of crack propagation, as well as the known field performance of these two materials. Kluwer Academic Publishers, 1992 Strebel J. Department of Macromolecular Science, Case Western Reserve University, 44106, Cleveland, Ohio, USA aut Moet A. Department of Macromolecular Science, Case Western Reserve University, 44106, Cleveland, Ohio, USA aut International Journal of Fracture Kluwer Academic Publishers 54/1(1992-03-01), 21-34 0376-9429 54:1<21 1992 54 10704 https://doi.org/10.1007/BF00040853 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF00040853 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Strebel J. Department of Macromolecular Science, Case Western Reserve University, 44106, Cleveland, Ohio, USA aut NATIONALLICENCE 700 1- Moet A. Department of Macromolecular Science, Case Western Reserve University, 44106, Cleveland, Ohio, USA aut NATIONALLICENCE 773 0- International Journal of Fracture Kluwer Academic Publishers 54/1(1992-03-01), 21-34 0376-9429 54:1<21 1992 54 10704 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer