Jointed rock masses are frequently encountered during the TBM excavation. To investigate breakage mechanism of jointed mass by disc cutter and precursory information before failure, a series indentation tests were performed on shear rheological test system. During test, breaking process specimens recorded digital image correlation system thermal infrared imager simultaneously. Therefore, strain...

In order to explore the mechanical response characteristics of fractured sandstone under true triaxial different medium principal stresses, matdem particle flow software was used study characteristics, fracture mechanism and damage evolution specimens conditions 30 MPa, 40 MPa 50 respectively. The simulation results are verified by test. show that stress, increase stress is beneficial strength ...

composite concrete-steel plate shear walls are the most critical resisting structural members that resist lateral and axial loads. This type of wall consisting of two steel faceplates presenting the outer skin, infill concrete and shear connectors which are used to provide the composite action of the steel faceplates with infill concrete in order to increase the strength and to reduce the local...

Composite wind turbine blades may experience interlaminar damage, including adhesive failure, cracking, and fracture from manufacturing or external fatigue load. Among these, the failure of joints is critical. Therefore, it important to identify mechanism in between spar cap–shear web trailing edge composite blades. We calculated toughness through Mode I, II, Mixed-mode tests for quantitative a...

the pharmacokinetics of recombinant human erythropoietin (rhuepo) administered intravenously has been investigated in a group of five patients with chronic renal failure who were dialysis-dependent. the half-life of circulating erythropoietin decreased from 7.9±oa hr (mean ±so) at the beginning of treatment to 6.2±o.6 hr after 6 weeks and 5a±o.9 hr after 4 months of treatment. in spite of the s...