The analysis of mechanical response and deformation-cracking behavior contributes to the high-efficiency extraction geo-energy long-term safety underground engineering structures. Compared natural cores, properties 3D-printed samples made from quartz sand as raw material are relatively homogeneous, can be used for quantitative studies on influence defects rocks. In this work, with single fractu...

This paper addresses the challenges of creating realistic models soil for simulations heavy vehicles on weak terrain. We modelled dense soils using discrete element method with variable parameters surface friction, normal cohesion, and rolling resistance. To find out what type can be represented, we measured internal friction bulk cohesion over 100 different virtual samples. test model, simulat...

recent developments in nanostructured products draw considerable attention to ultrafine grained materials. these materials are normally manufactured by different severe plastic deformation (spd) methods. in the present study, analytical models and finite element method (fem) are used to calculate strain imposed to a specimen that was deformed by equal channel angular pressing (ecap). in additio...

Flowability - as measured by hopper discharge rate, angle of repose and Carr's index (CI) - of surface modified microcrystalline cellulose granules was investigated experimentally. Three-dimensional simulations of the granule flow were performed, using the discrete element method (DEM), including either sliding and rolling friction or sliding friction and cohesion in the model. Granule surface ...

van der Waals homo- and heterostructures assembled by stamping monolayers together present optoelectronic properties suitable for diverse applications. Understanding the details of the interlayer stacking and resulting coupling is crucial for tuning these properties. We investigated the low-frequency interlayer shear and breathing Raman modes (<50 cm(-1)) in twisted bilayer MoS2 by Raman spectr...

Introduction: Although the theory of Roche [1] for the tidal disruption limits of orbiting satellites assumes a fluid body, a length to diameter of exactly 2.07:1, and a particular body orientation, the theory is commonly applied to the satellites of the solar system and to small asteroids and comets passing nearby a planet. Clearly these bodies are neither fluid nor generally that elongated, s...

From the moment they were formed to deposition process, characteristics and properties of rocks that form on earth's surface vary. The effects Mount Semeru's eruption will be transported deposited, eventually solidifying into rock masses. As a result weak places like joints, fractures, fissures, where density, filling, orientation are not continuous, masses in nature have discontinuous or quali...

Van der Waals coupling is emerging as a powerful method to engineer physical properties of atomically thin two-dimensional materials. In coupled graphene-graphene and graphene-boron nitride layers, interesting physical phenomena ranging from Fermi velocity renormalization to Hofstadter's butterfly pattern have been demonstrated. Atomically thin transition metal dichalcogenides, another family o...

This research-in-progress paper deals with service modularization of complex services. The successful creation of powerful modules allow leveraging modularization benefits such as reuse, faster development, module-wide innovation, and rapid reconfiguration. Consequently, service provider efficiencies as well as user centricity can be realized. Therefore, the principles of modularization, i.e. c...