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multiscale laboratories, analogue models of geologic processes, property data of analogue modelling materials, analogue, EPOS, Cohesion, Density, Friction coefficient, Poisson ratio, Young modulus, Digital Image Correlation (DIC) / Particle Image Velocimetry (PIV) > StrainMaster (La Vision GmbH), Python, Earthquake simulator, Ring-shear tester, Subduction box, Triaxal tester, Uniaxial tester, Flour > Rice, Foam rubber, Sand > Quartz Sand, Force sensor, Time lapse camera, tectonic process > subduction, megathrust, tectonic and structural features, tectonic setting > plate margin setting > forearc setting, tectonic setting > plate margin setting > subduction zone setting, Cohesion, Density, Digital Image Correlation (DIC) / Particle Image Velocimetry (PIV) > StrainMaster (La Vision GmbH), Earthquake simulator, Flour > Rice, Foam rubber, Force sensor, Friction coefficient, Poisson ratio, Python, Ring-shear tester, Sand > Quartz Sand, Subduction box, Time lapse camera, Triaxal tester, Uniaxial tester, Young modulus, geolocical hydrogeological > earthquake , megathrust, tectonic and structural features, tectonic process > subduction, tectonic setting > plate margin setting > forearc setting, tectonic setting > plate margin setting > subduction zone setting
Abstract:
This dataset provides friction and elasticity data from ring shear and axial tests, respectively, on rock analogue materials used at the University Roma Tre (Rome, IT) in “Foamquake”, a novel seismotectonic analog model mimicking the megathrust seismic cycle (Mastella et al., under review). Two granular materials (quartz sand and Jasmine rice) have been characterized by means of internal friction coefficients µ and cohesions C. An elastic material (foam rubber) have been characterized by means of Young’s modulus E and Poisson’s ratio v.
According to our analysis the granular materials show Mohr-Coulomb behaviour characterized by linear failure envelopes in the shear stress vs. normal load Mohr space. Peak, dynamic and reactivation friction coefficients of the quartz sand are µP = 0.69, µD = 0.56 and µR = 0.64, respectively. Cohesion ranges between 50 and 100 Pa. Rate-dependency of friction in quartz sand seems insignificant. Peak, dynamic and reactivation friction coefficients of the Jasmine rice are µP = 0.70, µD = 0.59 and µR = 0.61, respectively. Cohesion ranges between 30 and 50 Pa. Rate-weakening of Jasmine rice is c. 6% per tenfold change in shear velocity v. The Young’s modulus of the foam rubber has been constrained to 30 kPa, its Poisson’s ratio is v=0.1.
