Experimental Evaluation On Fatigue-creep Interaction
Author(s)
J. L. Pacheco
Abstract
Experimental evaluation on fatigue-creep
interaction
J . L. Pacheco
Universidade Federal do Rio Grande do Sul (UFRGS),
Pontificia Universidade Catdlica do Rio Grande do Sul (PUCRS),
Mechanical and Mechatronics Engineering Department, Brazil
Abstract
Mechanical systems components such as pipelines, steam generators, boilers,
pressure vessels, gas turbine and steam turbine are subject to fatigue-creep crack
assisted interaction. The scope of this work is to establish an experimental
methodology which can give theoretical support for modeling life prediction and
structural integrity analysis. Mechanical fracture tests were described in precracked
specimens of API P22 steel. The tests were made by ASTM E-399
norm. the (C,), parameter was calculated as a (daldt) function for used and virgin
material. It was possible to separate the contributions to the crack growth: one
caused by fatigue and another one caused by creep, for used and virgin materials.
We can conclude that it is not possible to evalu
Keywords
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