Southwest University of Science and Technology

About: Southwest University of Science and Technology is a education organization based out in Mianyang, China. It is known for research contribution in the topics: Adsorption & Graphene. The organization has 10017 authors who have published 8923 publications receiving 94850 citations. The organization is also known as: Xīnán Kējìdàxué.

Modeling progressive failures in rock slopes with non‐persistent joints using the numerical manifold method

Abstract: Rock slope failure is a complex process that usually involves both opening/sliding along pre-existing discontinuities as well as fracturing of intact rock bridges. Discontinuity persistence is an important factor governing rock slope instabilities. However, traditional slope failure analysis assumes persistent discontinuities, and rock slope fails along a predefined persistent continuous potential failure surface because of the limitations of the analysis tools. This paper proposes the numerical manifold method (NMM) incorporated with a Mohr–Coulomb criterion-based fracturing algorithm to simulate the progressive failure of rock slopes with non-persistent joints. Detailed fracturing algorithm is first presented. Then, the NMM enabling fracturing is calibrated through simulating an edge-cracked plate and the Brazilian test. Lastly, the developed code is applied to investigate the failure process of rock slopes involving non-persistent joints. Numerical results indicate that the proposed method can capture the opening/sliding along existing discontinuities, the fracturing in intact rock bridges and the final kinematic release. Progressive slope failure is well exhibited. Copyright © 2013 John Wiley & Sons, Ltd.

Three‐Dimensional Macroassembly of Sandwich‐Like, Hierarchical, Porous Carbon/Graphene Nanosheets towards Ultralight, Superhigh Surface Area, Multifunctional Aerogels

Abstract: A new, ultralight, superhigh surface area, multifunctional aerogel, which is macroassembled from sandwich-like, hierarchical, porous carbon/graphene nanosheets, is described. The multifunctional aerogel was characterized by means of XRD, SEM, TEM, Raman spectroscopy, and UV/Vis absorption spectroscopy. The multifunctional aerogel had an ultralow density of 8 mg cm(-3) and a superhigh surface area of 2650 m(2) g(-1) . The multifunctional aerogel was thermal stability and compressible. Meanwhile, the multifunctional aerogel exhibited high capacity for the adsorption of oils and organic solvents, unexpectedly high hydrogen adsorption and good electrochemical performance.

A novel 3D energetic MOF of high energy content: synthesis and superior explosive performance of a Pb(II) compound with 5,5′-bistetrazole-1,1′-diolate

Abstract: The development of high-performance insensitive energetic materials is important because of the increasing demand for these materials in military and civilian applications. A novel 3D energetic metal–organic framework (MOF) of exceptionally high energy content, [Pb(BTO)(H2O)]n, was synthesized and structurally characterized by single crystal X-ray diffraction, featuring a three-dimensional parallelogram porous framework, where BTO represents 5,5′-bistetrazole-1,1′-diolate. The thermal stability and energetic properties were determined, exhibiting good thermostability (Td = 309.0 °C), excellent detonation pressure (P) of 53.06 GPa, a detonation velocity (D) of 9.204 km s−1, and acceptable sensitivity to confirmed impact (IS = 7.5 J). Notably, the complex possesses unprecedented superior density than the reported energetic MOFs. The results highlight this new MOF as a potential energetic material.

Comparative study on the blends of PBS/thermoplastic starch prepared from waxy and normal corn starches

Abstract: In this study, waxy (0% amylose) and normal (26% amylose) corn starches were used to prepare thermoplastic starch (WTPS and NTPS, respectively). Furthermore, comparative blends of poly (butylene succinate) (PBS) and WTPS and NTPS were prepared for investigating the effect of starch type and PBS content on the properties of PBS/TPS blends. Morphology, processability, mechanical properties, water resistance, and thermal stability of the blends were evaluated. The results showed that the plasticization and processing of waxy corn starch were more easily performed than normal corn starch. The melt flow index, tensile properties, water resistance, and thermo stability of the PBS/TPS blends increased significantly with increasing PBS content. In addition, compared with the PBS/NTPS blends, the combination of PBS and WTPS could gain some excellent performances such as good processability, superior mechanical properties, and higher water resistance.