TenCate JA, Smith E, Guyer RA
Los Alamos National Laboratory, Earth and Environmental Sciences Division, Los Alamos, New Mexico 87545, USA.
Phys Rev Lett. 2000 Jul 31;85(5):1020-3. doi: 10.1103/PhysRevLett.85.1020.
Experimental properties of a new form of creep dynamics are reported, as manifest in a variety of sandstones, limestone, and concrete. The creep is a recovery behavior, following the sharp drop in elastic modulus induced either by nonlinear acoustic straining or rapid temperature change. The extent of modulus recovery is universally proportional to the logarithm of the time after source discontinuation in all samples studied, over a scaling regime covering at least 10(3) s. Comparison of acoustically and thermally induced creep suggests a single origin based on internal strain, which breaks the symmetry of the inducing source.
