The Experts below are selected from a list of 5442 Experts worldwide ranked by ideXlab platform
Songyu Liu - One of the best experts on this subject based on the ideXlab platform.
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Experimental and numerical study of cylindrical triaxial test on mono-sized glass beads under quasi-Static Loading Condition
Advanced Powder Technology, 2017Co-Authors: Patrick Pizette, Frédéric Becquart, Sébastien Remond, Nor-edine Abriak, Songyu LiuAbstract:Abstract This paper aims at studying the shear behavior of homogeneous granular materials by conventional triaxial test. The work is performed both in laboratory tests and by discrete element method simulations. Conventional triaxial tests are performed on glass beads packing, while a cylindrical rigid wall boundary Condition based on lame formula and a series of procedures are proposed to simulate the conventional triaxial test. The experimental results on dry and saturated glass beads samples have been studied to find out the effect of saturation Condition on the shear behavior. The comparisons between experimental and numerical results show that the numerical model can reproduce deviatoric curves satisfactorily in experimental Conditions as long as experimental sample remains cylindrical. It correctly describes the volumetric strains of a numerical sample up to the peak value. Additionally, a parametric study on the influence of main micromechanical parameters has been carried out, which has been compared to experimental tests with glass beads of different textures. The comparison highlights the significant effect of friction coefficients and rolling resistance coefficients on global behavior of granular materials.
N K Jain - One of the best experts on this subject based on the ideXlab platform.
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STRESS CONCENTRATION IN ISOTROPIC & ORTHOTROPIC COMPOSITE PLATES WITH CENTER CIRCULAR HOLE SUBJECTED TO TRANSVERSE Static Loading
International Journal of Mechanical and Industrial Engineering, 2014Co-Authors: Moon Banerjee, N K Jain, S. SanyalAbstract:The present study brings out the thorough analysis of isotropic and orthotropic fixed rectangular plate with center circular hole under transverse Static Loading Condition. In this paper influence of stress concentration and deflection due to singularity for isotropic and orthotropic composite materials under different parametric Conditions is obtained. The effect of thickness -to- width of plate (T/A) and diameter-to-width (D/A) ratio upon stress concentration factor (SCF) for different stresses were studied. An isotropic and one composite material were considered for analysis to determine the variation of SCF with elastic constants. Deflection in transverse direction were calculated and analyzed. Results are presented in graphical form and discussed. Three-dimensional finite element models were created using ANSYS software. Results showed that maximum stress appear near the vicinity of the hole at the upper and lower portions of the plate. The effect of material properties, (E1/E2) on SCF for stresses along x, y and z axis is established thorough this analysis.
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3D ANALYSIS OF STRESS CONCENTRATION FACTOR AND DEFLECTION IN THIN ISOTROPIC AND ORTHOTROPIC PLATES WITH CENTRAL CIRCULAR HOLE SUBJECTED TO TRANSVERSE Loading
2011Co-Authors: N K Jain, S. SanyalAbstract:A number of analytical and numerical techniques are available for the two dimensional study of stress concentration around the hole(s) in isotropic and composite plates subjected to in-plane or transverse Loading Conditions. The information on the techniques for three dimensional analyses of stress concentration around the hole in isotropic and composite plates subjected to transverse Loading Conditions is, however, limited. In the present work, distributions of stresses and deflection in simply supported rectangular isotropic and orthotropic composite plates with central circular hole subjected to transverse Static Loading have been studied using 3-D finite element method. The effect of t/A and D/A ratio upon stress concentration factor and deflection in isotropic and orthotropic plates under transverse Static Loading Condition is studied. The 3-D results are compared with 2-D results and it is observed that the 2-D results for orthotropic composite plates subjected to transverse Loading Conditions vary too much and hence should not be taken for conclusion. All results are presented in graphical form and discussed. The finite element formulation and its analysis are carried out using ANSYS package.
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finite element analysis for stress concentration and deflection in isotropic orthotropic and laminated composite plates with central circular hole under transverse Static Loading
Materials Science and Engineering A-structural Materials Properties Microstructure and Processing, 2008Co-Authors: N K Jain, N D MittalAbstract:Abstract The distributions of stresses and deflection in rectangular isotropic, orthotropic and laminated composite plates with central circular hole under transverse Static Loading have been studied using finite element method. The aim of author is to analyze the effect of D / A ratio (where D is hole diameter and A is plate width) upon stress concentration factor (SCF) and deflection in isotropic, orthotropic and laminated composite plates under different transverse Static Loading Condition. Analysis has been done for symmetric and anti-symmetric composite laminates. The results are obtained for three different boundary Conditions. The variations of SCF and deflection with respect to D / A ratio are presented in graphical form and discussed. The finite element formulation is carried out in the analysis section of the ANSYS package.
N D Mittal - One of the best experts on this subject based on the ideXlab platform.
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finite element analysis for stress concentration and deflection in isotropic orthotropic and laminated composite plates with central circular hole under transverse Static Loading
Materials Science and Engineering A-structural Materials Properties Microstructure and Processing, 2008Co-Authors: N K Jain, N D MittalAbstract:Abstract The distributions of stresses and deflection in rectangular isotropic, orthotropic and laminated composite plates with central circular hole under transverse Static Loading have been studied using finite element method. The aim of author is to analyze the effect of D / A ratio (where D is hole diameter and A is plate width) upon stress concentration factor (SCF) and deflection in isotropic, orthotropic and laminated composite plates under different transverse Static Loading Condition. Analysis has been done for symmetric and anti-symmetric composite laminates. The results are obtained for three different boundary Conditions. The variations of SCF and deflection with respect to D / A ratio are presented in graphical form and discussed. The finite element formulation is carried out in the analysis section of the ANSYS package.
Hessam Ghasemnejad - One of the best experts on this subject based on the ideXlab platform.
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to improve failure resistance in joint design of composite wind turbine blade materials
Renewable Energy, 2015Co-Authors: O Alkhudairi, Hessam GhasemnejadAbstract:In this paper the failure behaviour of composite materials in the skin-stiffener of wind turbine blade structures are investigated. In order to achieve this, the laminated composite beams were stitched using glass, carbon and Kevlar yarns before curing process. Four different moulds of T-beam with adhesive; T-beam with stitches; Box-beam with adhesive and Box-beam with stitches were studied in this work. These specimens were tested under quasi-Static Loading Condition to compare the failure resistance of adhesive and stitched bonding methods. Experimental results indicated that stitching can significantly improve failure load and interlaminar fracture resistance of the joints in wind turbine composite blade structures. The cohesive zone modelling (CZM) technique which is known as a variation in the cohesive stresses with the interfacial opening displacement along the localised fracture process zone is also used to predict bonding failure in the skin-stiffener of wind turbine blade structures.
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Advanced natural stitched composite materials in skin-stiffener of wind turbine blade structures
Key Engineering Materials, 2012Co-Authors: F. Papadopoulos, D. Aiyappa, R. Shapriya, E. Sotirchos, Hessam Ghasemnejad, R. Benhadj-djilaliAbstract:In this paper the failure behaviour of natural stitched composite materials in the skin-stiffener of wind turbine blade structures are investigated. For this study, the laminated composite beams were stitched using Flax yarns before curing process. Two stiffener structures of T-beam and Box-beam are studied in this paper. These specimens were tested under quasi-Static Loading Condition to compare the failure resistance of adhesive and stitched bonding methods. Furthermore, the cohesive zone modelling (CZM) which is known as a variation in the cohesive stresses with the interfacial opening displacement along the localised fracture process zone is used to predict bonding failure in the skin-stiffener of wind turbine blade structures.
Patrick Pizette - One of the best experts on this subject based on the ideXlab platform.
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Experimental and numerical study of cylindrical triaxial test on mono-sized glass beads under quasi-Static Loading Condition
Advanced Powder Technology, 2017Co-Authors: Patrick Pizette, Frédéric Becquart, Sébastien Remond, Nor-edine Abriak, Songyu LiuAbstract:Abstract This paper aims at studying the shear behavior of homogeneous granular materials by conventional triaxial test. The work is performed both in laboratory tests and by discrete element method simulations. Conventional triaxial tests are performed on glass beads packing, while a cylindrical rigid wall boundary Condition based on lame formula and a series of procedures are proposed to simulate the conventional triaxial test. The experimental results on dry and saturated glass beads samples have been studied to find out the effect of saturation Condition on the shear behavior. The comparisons between experimental and numerical results show that the numerical model can reproduce deviatoric curves satisfactorily in experimental Conditions as long as experimental sample remains cylindrical. It correctly describes the volumetric strains of a numerical sample up to the peak value. Additionally, a parametric study on the influence of main micromechanical parameters has been carried out, which has been compared to experimental tests with glass beads of different textures. The comparison highlights the significant effect of friction coefficients and rolling resistance coefficients on global behavior of granular materials.