Topic
Vibration fatigue
About: Vibration fatigue is a research topic. Over the lifetime, 3460 publications have been published within this topic receiving 46297 citations.
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TL;DR: In this paper, a new fatigue failure criterion for flexure fatigue test was developed using the dissipated energy approach, which is independent of the type of load control, temperature and mix and binder type.
Abstract: Fatigue in hot-mix asphalt is the accumulation of damage under the effect of repeated loading. Flexural beam fatigue testing in the laboratory has been used for several decades and is expected to be an integral part of the new superpave advanced characterization procedure. Current fatigue failure criteria are based on a simple relation between the tensile strain in the beam versus the number of load repetitions to failure. Failure in the beam has relied on an arbitrary criterion such as 50 percent reduction of stiffness. This method does not provide a consistent indication of the onset of failure when different modes of loading are used. The dissipated energy approach is a promising technique for fatigue characterization, since it provides a consistent indication of the level of deterioration in the specimen in terms of behavior, accumulated damage or remaining life. As a part of the superpave advanced characterization research, a new fatigue failure criterion for flexure fatigue test was developed in this study using the dissipated energy approach. This approach makes it possible to predict the fatigue behavior of hot-mix asphalt in the laboratory over a wide range of conditions from the results of a few simple fatigue tests. A fundamental energy-based fatigue failure criteria methodology was developed using the dissipated energy approach, which is independent of the type of load control, temperature and mix and binder type.
14 citations
TL;DR: In this article, an analytical solution based on the statistical theory of the peak distribution of a stationary random process and the concept of equivalent stress range is presented for a fast fatigue assessment under wide-band random loading.
14 citations
TL;DR: In this paper, a strain modal coordinate based state-space model was developed, especially for large engineering structures, which can be integrated with the existing fatigue monitoring system as an early warning tool.
14 citations
TL;DR: In this article, the fatigue damage and fatigue life of a structural component when subjected to variable-amplitude stress loading modeled as a wide-band or narrow-band Gaussian random process is investigated.
13 citations
TL;DR: In this paper, the Asphalt Concrete Pavement-Fatigue model is used to estimate the fatigue property of an asphalt mix. But, due to the non-homogenous stress and strain field in the beam, the measured response does not represent the stiffness modulus of the material but a weighted stiffness value.
Abstract: The fatigue property of an asphalt mix is an important issue in pavement design. This property is often determined with the aid of a four-point bending (4PB) test in controlled deflection mode. The fatigue property is related to the decrease in the calculated complex stiffness modulus, however, due to the non- homogenous stress and strain field in the beam, the measured response does not represent the stiffness modulus of the material but a weighted stiffness value. For a correct interpretation, a fatigue damage material model like the Asphalt Concrete Pavement-Fatigue model is needed. After integration, the calculated and measured responses are compared. By varying the model parameters, an excellent comparison between the two responses is obtained up to a certain number of cycles. This number of cycles is denoted as the fatigue life NPH. The accumulated dissipated energy at the surface of the beam in the midsection can be expressed as a constant times the fatigue life NPH to the power z and also ...
13 citations