Acoustic Emissions in Fracturing Paper
The fracture dynamics of heterogeneous materials is a rich subject with obvious practical interests,especially the subcritical fracture,where a material breaks through a series of successive,non-correlated and localized fracture events until the arriving to a critical situation where the whole material fails.Paper has been a common model material to study this phenomenon,and high-resolution and high-speed visualization are the usual ways to follow the dynamics of the process.However,visualization presents many limitations,especially for long experiences.That is one of the reasons why we are coupling acoustics to the measurements in an attempt to establish it as the main source of information.Acoustics presents a much better temporal resolution and captures a higher number of events than visualization.By thresholding the amplitude of the acoustic signal,it is possible to get similar activities in both measurements.The waiting times between events and the energy of the events are both distributed in power laws with exponents which are similar for the two different kind of measurements (visualization and acoustics),corroborating that the recorded acoustic data corresponds indeed to the fracture process.
Subcritical fracture Acoustic emissions crack propagation scale invariance.
Menka Stojanova Stéphane Santucci Lo(I)c Vanel, Osvanny Ramos
Institut Lumière Matière,UMR5306 Université Lyon 1-CNRS,Université de Lyon 69622 Villeurbanne cedex, Laboratoire de Physique,CNRS UMR 5672,Ecole Normale Supérieure de Lyon,Université de Lyon 46 allée d
国际会议
北京
英文
1-8
2013-06-16（万方平台首次上网日期，不代表论文的发表时间）