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micro-hydromechanical deep drawing 1

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Analysis of foundation sliding of an arch dam considering the hydromechanical behavior

Maria Luísa Braga FARINHA, José Vieira de LEMOS, Emanuel MARANHA DAS NEVES

Frontiers of Structural and Civil Engineering 2012, Volume 6, Issue 1, Pages 35-43 doi: 10.1007/s11709-012-0142-1

Abstract: This paper presents the application of a methodology which can be used to assess arch dam foundation stability, using the discrete element method (DEM) and the code 3DEC. A global three-dimensional model of a dam foundation was developed, in which some discontinuities were simulated and both the grout and drainage curtains were represented. The model, calibrated taking into account recorded data, was used to carry out nonlinear mechanical analysis. The same model was employed to perform a hydraulic analysis, based on equivalent continuum concepts, which allowed the water pressure pattern within the foundation to be obtained. These water pressures were applied on discontinuities involved in the possible sliding mechanism along the dam/foundation interface, and the safety of the dam/foundation system was evaluated using a process of reduction of strength characteristics, with the aim of calculating the minimum safety factors that ensure stability. Results were compared with those obtained with the usual bi-linear uplift pressure distribution at the base of the dam, commonly used in concrete dam design. The relevance of carrying out hydraulic analysis in arch dam foundation failure studies is highlighted.

Keywords： concrete dams rock foundations hydromechanical behavior failure analysis

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Micro-hydromechanical deep drawing of metal cups with hydraulic pressure effects

Liang LUO, Zhengyi JIANG, Dongbin WEI, Xiaogang WANG, Cunlong ZHOU, Qingxue HUANG

Frontiers of Mechanical Engineering 2018, Volume 13, Issue 1, Pages 66-73 doi: 10.1007/s11465-018-0468-z

Abstract: Micro-hydromechanical deep drawing (MHDD), a typical microforming method, has been developed to take

Keywords： micro-hydromechanical deep drawing microforming size effects lubrication Voronoi

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Research on swimming by undulatory long dorsal fin propulsion

WANG Guangming, SHEN Lincheng, WU Yonghui

Frontiers of Mechanical Engineering 2007, Volume 2, Issue 1, Pages 77-81 doi: 10.1007/s11465-007-0013-y

Abstract: The hydromechanical performances of the undulatory long dorsal fin propeller of are estimated with theThe hydromechanical efficiency of the undulatory long dorsal fin system ranged from 81.664% to 86.420%is suggested that the undulatory long dorsal fin propulsion is an adaptation to swimming with high hydromechanical

Keywords： locomotive characteristic hydromechanical observation propulsion hydromechanical efficiency

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Hydromechanical model for hydraulic fractures using XFEM

Bo HE

Frontiers of Structural and Civil Engineering 2019, Volume 13, Issue 1, Pages 240-249 doi: 10.1007/s11709-018-0490-6

Abstract: In this study, a hydromechanical model for fluid flow in fractured porous media is presented.Finally, examples are presented to demonstrate the versatility and efficiency of this two-scale hydromechanical

Keywords： multi-phase medium porous fracture multi-scale method