Fig. 2From: Spacetime simulation of dynamic fracture with crack closure and frictional slidingLocal coordinate frame at location P on a spacetime fracture interface \(\Gamma \) for a problem in two spatial dimensions (\(d=2\)). Traces of the stress and velocity fields from opposing sides, \(({\mathbf {S}}^{\pm }, {\mathbf {v}}^{\pm })\), determine the Riemann values, \((\breve{\mathbf {S}}, \breve{\mathbf {v}}^{\pm })\), on \(\Gamma \)Back to article page