Waveforms related to dynamic response of a filled fracture

We provide waveforms related to dynamic response of an artificial filled fracture by an split Hopkinson pressure bar system that is made of 7075 aluminum alloy. A thin layer of fine quartz sand was sandwiched between two aluminum cylinderical bars and sleeved by a holder to simulate the filled fracture. All bar has a diameter of 50 mm. The sand has a density of 1750 kg/m3, equivalent to a solid volume fraction of 0.76. The grain size of the sand ranges from 0.015 mm to 0.3 mm, with a median effective diameter of 0.15 mm. The average thickness of the infill was 2.5 mm. Samples with varied water contents were considered, i.e., 0% (dry), 4.73%, 9.45%, 14.18%, 18.9%, and 23.63% (saturated), respectively. Each sample was pre-compacted for 8 times by a standard compactor dropping from a same height to ensure a similar dense state with a porosity of around 0.4. The sample assembly was loaded dynamically by the aluminum split Hopkinson pressure bar system. The initial pressure in the gas gun was fixed as 0.16 MPa to induce similar incident waves. The reflected and transmiited waveforms were obtained and provided in the data. Data are presented by voltage in which 1 mv corresponds to 1000 με.