Open AccessDriving‐stress waveform and the determination of rock internal friction by the stress—strain curve method
Author(s) -
Liu HsiPing
Publication year - 1980
Publication title -
geophysical journal of the royal astronomical society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.302
H-Index - 168
eISSN - 1365-246X
pISSN - 0016-8009
DOI - 10.1111/j.1365-246x.1980.tb02638.x
Subject(s) - waveform , distortion (music) , stress (linguistics) , geology , mechanics , harmonic , fourier transform , geotechnical engineering , hysteresis , materials science , acoustics , mathematical analysis , mathematics , physics , voltage , amplifier , linguistics , philosophy , optoelectronics , cmos , quantum mechanics
Summary Harmonic distortion in the stress—time function applied to rock specimens affects the measurement of rock internal friction in the seismic wave periods by the stress—strain hysteresis loop method. If neglected, the harmonic distortion can cause measurements of rock internal friction to be in error by 30 per cent in the linear range. The stress‐time function therefore must be recorded and Fourier analysed for correct interpretation of the experimental data. Such a procedure would also yield a value for internal friction at the higher harmonic frequencies.