کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
4740463 1641168 2012 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Microplasticity effect in low-velocity zone induced by seismic wave
موضوعات مرتبط
مهندسی و علوم پایه علوم زمین و سیارات فیزیک زمین (ژئو فیزیک)
پیش نمایش صفحه اول مقاله
Microplasticity effect in low-velocity zone induced by seismic wave
چکیده انگلیسی

Microplasticity effects in loam caused by seismic wave of frequency about 1000 Hz are detected in the borehole-to-borehole measurements. Microplasticity manifestations on seismic record are presented as the ladder-like stepwise changes in amplitude course. The step (plateau) on seismic trace is time delay, its duration depends on the strain–amplitude value. Time delay changes the frequency characteristic of stress pulse, nonlinearly transforms wave front, and shifts the amplitude maximum along time axis. The microplastic process occurs owing to the anomalous realignment of the internal stresses on the microstructural defects in the area of small deformations. This is the useful contribution to wave propagation physics. The received results can also be used in solving the applied problems in material science, seismic prospecting, diagnostics, etc.


► Microplasticity in loam caused by seismic wave is detected in field research.
► Microplasticity manifestations have the ladder-like changes in the amplitude course.
► The plateau in seismic trace is the time delay that depends on the amplitude.
► Time delay transforms wave front, shifts the amplitude maximum along time axis.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Applied Geophysics - Volume 83, August 2012, Pages 90–95
نویسندگان
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