Figure 9
From: A laboratory study of hydraulic fracturing at the brittle-ductile transition
The normalized cumulative acoustic emission energy \({\tilde{\Gamma }}\) is a function of the normalized temperature \({\tilde{T}}\): \({\tilde{\Gamma }}\) decreases with increasing temperature and marks a stark transition of the hydro-fracturing behaviour at the glass transition temperature \(T_\text{g}=105\,^{\circ }\)C. While fracturing is observed up to \({\tilde{T}}\le 0.96\), no fracture is propagated at \({\tilde{T}}\ge 0.987\).
