Figure 6
From: A laboratory study of hydraulic fracturing at the brittle-ductile transition
Normalized pressure \(p/p_\text{m}\) and cumulative acoustic emission energy \(E_\text{AE}\) for all tests carried out in the glassy regime of PMMA. The normalized pressure-time curves are self similar, while the AE energy signature proves that higher temperature and a loading path that promotes deviatoric stress concentration can result in earlier onset of inelastic processes during injection.
