The Experts below are selected from a list of 27558 Experts worldwide ranked by ideXlab platform

Guy Sutter - One of the best experts on this subject based on the ideXlab platform.

  • influence of interfacial Friction and specimen configuration in split hopkinson pressure bar system
    Tribology International, 2015
    Co-Authors: W Z Zhong, A Rusinek, Tomasz Jankowiak, Farid Abed, R Bernier, Guy Sutter
    Abstract:

    Abstract Influences of Interface Friction and specimen configuration on the material dynamic response using split Hopkinson pressure bar (SHPB) experiment are evaluated using nonlinear finite element (FE) analysis. The effect of various Friction conditions between specimen and the transmitted/incident bars in SHPB system is investigated for different specimen geometries. Cylindrical and cuboid specimens with one- and four-layered configurations are adopted and the stress states along the specimen are analyzed. Results indicate that the transmitted signal decreases and the reflected signal increases with Friction coefficient increasing. Interface Friction brings great variation in stress triaxiality and Lode parameters in the SHPB specimen. Experimental tests are also conducted in this study to verify the conclusions made through FE simulations.

Asad Esmaeily - One of the best experts on this subject based on the ideXlab platform.

  • A Survey of Soil-Reinforcement Interface Friction
    International Review of Civil Engineering, 2012
    Co-Authors: Shahin Nayyeri Amiri, Asad Esmaeily
    Abstract:

    The most important aspect of reinforced earth is the sliding shear resistance between the soil and reinforcements expressed in terms of a sliding Friction angle or a coefficient of Friction. A number of different procedures have been followed in order to quantify this physical property and as a result there is a wide range of reported values. In the present paper, the Friction coefficient values of smooth and rough brass strips as determined by modified direct shear tests and by pull out and wall rotation tests in a model box are given and interpreted. For smooth strips, it is found that direct shear and pull out tests give comparable results and the Friction coefficients are not influenced by the density. For rough strips, however, pull out tests may give much higher Friction values than the direct shear tests as density increases. In wall rotation tests which are an attempt to represent the Friction mobilization mechanism in reinforced earth, the Friction coefficient values appear to be limited by the values obtained from direct shear tests for both smooth and rough strips, irrespective of density

Suhas S. Joshi - One of the best experts on this subject based on the ideXlab platform.

  • modeling of chip tool Interface Friction to predict cutting forces in machining of al sicp composites
    International Journal of Machine Tools & Manufacture, 2009
    Co-Authors: Uday A. Dabade, Dilip Dapkekar, Suhas S. Joshi
    Abstract:

    Abstract In Al/SiCp metal matrix composites, in addition to machine, tool and process-related parameters, a change in composition (size and volume fraction of reinforcement) has a influence on machining force components. In the analytical models in the literature, the effect of abrasive reinforcement particles, which affects the coefficient of Friction and consequently the Friction angle, has not been considered while predicting cutting forces in machining of MMCs. In this paper, chip–tool Interface Friction in machining of Al/SiCp composites has been considered to involve two-body abrasion and three-body rolling caused due to presence of reinforcements in composites. The model evaluates resulting coefficient of Friction to predict the cutting forces during machining of Al/SiCp composites using theory of oblique cutting. Further, the model considers various Frictional forces on the wiper geometry on the cutting edge that has been found to improve the integrity of machined surface on composites. The predicted cutting force values were found to agree well with the corresponding experimental values for finer reinforcements composites with the assumption that 40% of the reinforcement particles contribute to the abrasion at chip–tool Interface. However, for the coarser reinforcement composites, assumption that the 60% of the particles contribute to the abrasion yields better results.

  • Modeling of chip–tool Interface Friction to predict cutting forces in machining of Al/SiCp composites
    International Journal of Machine Tools and Manufacture, 2009
    Co-Authors: Uday A. Dabade, Dilip Dapkekar, Suhas S. Joshi
    Abstract:

    Abstract In Al/SiCp metal matrix composites, in addition to machine, tool and process-related parameters, a change in composition (size and volume fraction of reinforcement) has a influence on machining force components. In the analytical models in the literature, the effect of abrasive reinforcement particles, which affects the coefficient of Friction and consequently the Friction angle, has not been considered while predicting cutting forces in machining of MMCs. In this paper, chip–tool Interface Friction in machining of Al/SiCp composites has been considered to involve two-body abrasion and three-body rolling caused due to presence of reinforcements in composites. The model evaluates resulting coefficient of Friction to predict the cutting forces during machining of Al/SiCp composites using theory of oblique cutting. Further, the model considers various Frictional forces on the wiper geometry on the cutting edge that has been found to improve the integrity of machined surface on composites. The predicted cutting force values were found to agree well with the corresponding experimental values for finer reinforcements composites with the assumption that 40% of the reinforcement particles contribute to the abrasion at chip–tool Interface. However, for the coarser reinforcement composites, assumption that the 60% of the particles contribute to the abrasion yields better results.

W Z Zhong - One of the best experts on this subject based on the ideXlab platform.

  • influence of interfacial Friction and specimen configuration in split hopkinson pressure bar system
    Tribology International, 2015
    Co-Authors: W Z Zhong, A Rusinek, Tomasz Jankowiak, Farid Abed, R Bernier, Guy Sutter
    Abstract:

    Abstract Influences of Interface Friction and specimen configuration on the material dynamic response using split Hopkinson pressure bar (SHPB) experiment are evaluated using nonlinear finite element (FE) analysis. The effect of various Friction conditions between specimen and the transmitted/incident bars in SHPB system is investigated for different specimen geometries. Cylindrical and cuboid specimens with one- and four-layered configurations are adopted and the stress states along the specimen are analyzed. Results indicate that the transmitted signal decreases and the reflected signal increases with Friction coefficient increasing. Interface Friction brings great variation in stress triaxiality and Lode parameters in the SHPB specimen. Experimental tests are also conducted in this study to verify the conclusions made through FE simulations.

Shahin Nayyeri Amiri - One of the best experts on this subject based on the ideXlab platform.

  • A Survey of Soil-Reinforcement Interface Friction
    International Review of Civil Engineering, 2012
    Co-Authors: Shahin Nayyeri Amiri, Asad Esmaeily
    Abstract:

    The most important aspect of reinforced earth is the sliding shear resistance between the soil and reinforcements expressed in terms of a sliding Friction angle or a coefficient of Friction. A number of different procedures have been followed in order to quantify this physical property and as a result there is a wide range of reported values. In the present paper, the Friction coefficient values of smooth and rough brass strips as determined by modified direct shear tests and by pull out and wall rotation tests in a model box are given and interpreted. For smooth strips, it is found that direct shear and pull out tests give comparable results and the Friction coefficients are not influenced by the density. For rough strips, however, pull out tests may give much higher Friction values than the direct shear tests as density increases. In wall rotation tests which are an attempt to represent the Friction mobilization mechanism in reinforced earth, the Friction coefficient values appear to be limited by the values obtained from direct shear tests for both smooth and rough strips, irrespective of density