科研之友
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摘要
In general, the fatigue life of asphalt concrete, representing its resistance against fatigue cracking, is determined based on stiffness or deformation, which is not directly related to crack development. This paper proposes a new fatigue failure criterion considering crack development in indirect tension (IDT) fatigue tests under the stress-controlled mode of loading. The crack length and width of IDT specimens were monitored periodically using two digital cameras mounted on each face of the IDT specimens. Fatigue failure was defined as the number of loading cycles corresponding to the beginning of rapid crack opening. A simple approach as for practical applications was proposed to estimate the crack width from the horizontal deformation of an IDT specimen. Finally, the validity of the new fatigue criterion was evaluated relative to an existing fatigue failure criterion.
- 出版日期2016-1
