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Dynamic mechanical performance of impact rocks under loading and . . . The results show that the dynamic stress-strain curve can be divided into the elastic deformation stage，the unstable fracture development stage and the post-fracture stage In the unstable fracture development stage，the strain hardening phenomenon and the leaping characteristic are obvious
Comparative Study on Dynamic Mechanical Properties and Energy . . . To study differences in dynamic mechanical properties and energy dissipation of rocks of different lithologies, three kinds of rock that are common in rock engineering and have large differences in wave impedance were selected: red sandstone, gray sandstone, and granite
Dynamic mechanical behavior and failure characteristics of jointed rock . . . In this study, multi-stage impact loading tests and numerical simulations were conducted on jointed rock-like specimens with sawtooth joints to investigate the effect of joint roughness and joint morphology on dynamic properties and failure characteristics of jointed rock
Study on Material Parameter Value Method and Numerical . . . - Springer The rationality and applicability of the modeling are further analyzed in comparison with numerical simulations This study mainly focuses on the dynamic mechanical properties of rock and its damage mechanism under different rock samples, impact air pressure and impact forms, and the test program is shown in Table 3
Dynamic mechanical properties of different types of rocks under impact . . . To study the mechanical properties of different types of rocks under impact loading, static mechanical parameter tests and split-Hopkinson pressure bar (SHPB) dynamic impact experiments were conducted on five typical rock specimens
Mechanical Behavior and Failure Mechanism of Rocks under Impact Loading . . . Some indices such as dynamic compressive strength, dynamic increase factor, and dissipation energy density, were unitized to investigate the mechanical behavior and failure mechanism of saturated rocks The test results show that, regardless of the moisture state, the dynamic strength is positively sensitive to the strain rate
Dynamic tensile behaviour under impact loading for rocks damaged by . . . We aim to investigate the dynamic mechanical properties, strain field, energy evolution, and progressive cracking of damaged sandstone under impact loading In this study, sandstone specimens undergo various damage degrees caused by precompression and are characterized by computed tomography (CT) imaging