On Stress–Strain Function of Geomaterials Subjected to Blast-Loads

摘要: An appropriate stress–strain relationship of geomaterials subjected to blast loading is essential for the design underground protective structures. Previous experimental and theoretical research efforts indicate that constitutive behavior under depends upon strain rate, stress level, interaction among three phases (solid, liquid, gases). In current state-of-the-art, various advanced models are available model blast-loads. However, considering cost computation associated with such models, a functional form discussed unloading branches curve load based on the three parameters: weight factor, initial modulus ratio, recovery ratio. It observed new reasonably captures mean trend experimentally obtained or simulated data. This paper further investigates applicability this provides catalog parameters direct use by practicing engineers. The dependence function lateral confinement, degree saturation, compaction, locking initiation investigated, some simple rules proposed reasonable estimation parameters. would be quite useful in practical problems specially where too high. addition this, parametrization complex nonlinear also an opportunity investigate effect uncertainties soil computationally efficient manner.