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. 2016 Apr 26;6:24852. doi: 10.1038/srep24852

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(a) BRAVA apparatus showing the double direct shear configuration within the pressure vessel and the intensifiers used to pressurize pore fluid (P_pu, P_pd) and confining pressure (P_c). (b) Details of the sample assembly in the double direct shear configuration for vessel experiments. (c) Initial set-up showing the jacketed sample assembly with pore fluid pressure tubing and the internal load cells within the pressure vessel.