ELASTO-PLASTIC BEHAVIORS OF SOFT SEDIMENTARY ROCK (POROUS TUFF)

Flow in a porous visco-elasto-plastic solid

−βθ div ut , has been derived and existence of global strong solutions in 3D for the isothermal case has been proved in [1]. Existence for the full system under suitable hypotheses is proved in [2]. The unknowns are u (displacement of the solid matrix), p (capillary pressure), and θ (absolute temperature). The system contains four hysteresis operators: The degenerate Preisach operator G describ...

Fault Formation at Impact Craters in Porous Sedimentary Rock Targets

published in: Lunar and Planetary Science XL, CD-ROM, Lunar and Planetary Institute, Houston (2009). 1073.pdf 40th Lunar and Planetary Science Conference (2009)

Parameter sensitivity of anisotropic elasto-plastic shell

1.Abstract A continuum-based design sensitivity analysis (DSA) applied to the thickness design of the anisotropic elasto-plastic shell structures is developed. Since main interest lies in developing path-following algorithms for solving sensitivity problems of elasto-plasticity, such an incremental or a step-by-step formalism will be employed to implementation into the structural analysis progr...

Longitudinal Motion of an Elasto - Plastic Bar

Rupture cascades in a discrete element model of a porous sedimentary rock.

We investigate the scaling properties of the sources of crackling noise in a fully dynamic numerical model of sedimentary rocks subject to uniaxial compression. The model is initiated by filling a cylindrical container with randomly sized spherical particles that are then connected by breakable beams. Loading at a constant strain rate the cohesive elements fail, and the resulting stress transfe...