Papers Posted on - Sep / 2015


Author Name Krunal G. Girase, Navneet K. Patil, D. S. Deshmukh, Kanak Kalita and Dinesh Shinde
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DOI 10.11127/ijammc.2015.09.01
Paper Title Stress Intensity Factors for Single Cracked Pressurized Cylinder
Abstract
The stress intensity factor is the linear elastic fracture mechanics parameter that relates remote load, crack size and structural geometry. It predicts very accurately the stress state. In this work SIF (Stress Intensity Factor) for a single cracked pressurized cylinder is calculated. Ansys10 Finite Element Analysis software was used in this study. This software was used to obtain the nodal forces at the crack tip as well as the displacements in the vicinity of the crack tip. These two parameters were then used in the modified virtual crack closure technique to obtain the stress intensity factors. Very good agreement between the finite element stresses and the theoretical stresses is seen.
Keywords
Keywords: SIF, Crack, ANSYS, Pressure vessel.
Author Name Sarmila Sahoo
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DOI 10.11127/ijammc.2015.09.05
Paper Title Laminated composite stiffened elliptic paraboloid shell with cutout under clamped condition
Abstract
Clamped elliptic paraboloid shells made of laminated composite materials in presence of stiffeners and cutouts are analyzed employing the eight-noded curved quadratic isoparametric element for shell with a three noded beam element for stiffener formulation. Free vibration problem of stiffened shells with different size and position of the cutouts with respect to the shell centre are examined to find natural frequency and mode shapes of stiffened shells and arrive at some conclusions useful to the designers. The results are further analyzed to suggest guidelines to select optimum size and position of the cutout with respect to shell centre.
Keywords
Keywords: Clamped elliptic paraboloid shell; Laminatedcomposite,cutout; Natural frequency; mode shape.
Author Name Jeeoot Singh
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DOI 10.11127/ijammc.2015.09.04
Paper Title Geometrically Nonlinear Flexural Analysis of Rectangular Plates under Different Transverse Loadings Using Mesh-Free Method
Abstract
The paper examines the large deformation flexural response of laminated composites and sandwich plates under various transverse loadings. The mathematical formulation of the actual physical problem of the plate subjected to mechanical loading is presented utilizing different shear deformation theories and von Karman nonlinear kinematics. The nonlinear governing differential equations of equilibrium are linearized using quadratic extrapolation technique. A meshless technique based on radial basis functions (RBFs) is used for analysis of the problems. Laminated and sandwich plates with immovable simply supported and clamped edges and subjected to point, line, sinusoidal and uniformly distributed loads are analyzed.
Keywords
Keywords: Point and Line Loads, Nonlinear, Flexural, Meshfree.
Author Name Kanak Kalita,SnehaMokal and RakeshChaudhari
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DOI 10.11127/ijammc.2015.09.03
Paper Title Non-dimensional Analysis of Orthotropic Plate with Circular Cutout
Abstract
Stress concentration is the localization of stresses due to discontinuation or abruption in the geometry. To find the localized stresses, Stress Concentration Factor (SCF) is used. SCF depends on the material and geometry of the specimen. In the present paper an orthotropic plate with a central circular cutout subjected to normal pressure is studied. Based on material properties variation of the non-dimensional parameters E2/E1, G12/E1 and μ12 have been considered within their feasible range. The effect of these non-dimensional parameters at different values of polar angle on SCF is studied here. Formulation of mathematical equation for SCF has been done in MATLAB and subsequently results are presented here. The work successfully highlights that for orthotropic material (unlike isotropic materials) SCF depends on material properties. It increases with increase in E2/E1 ratio and decreases with increase in μ12 and G12/E1 ratio.
Keywords
Keywords: SCF, CircularCutout, Non-dimensional Parameters, Polar angle, Orthotropic.
Author Name Aditya Kumar, Sachin Maheshwari
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DOI 10.11127/ijammc.2015.09.02
Paper Title Optimization of Submerged Arc Welding Rutile Based Flux constituents by Hybrid Grey, Fuzzy and Taguchi Analysis
Abstract
A submerged arc welding, flux system of TiO2-Al203-CaO was selected for the study. TiO2 in the flux can improve the quality of weld, in terms of mechanical properties. It can also enhance the heat input and penetration. This paper establishes a procedure of flux composition selection for multi properties optimization of weld. L9 orthogonal array was used to design the flux. Three responses vickers hardness, impact strength and ultimate tensile strength were measured at 32 volt and 34 volt respectively. A hybrid method combining grey, fuzzy and Taguchi approaches was implemented. By using this approach the experimental results of three properties were integrated to a performance index. The result of the study shows that performance index improved 15.72% &11% at 32 volt and 34 volt respectively.
Keywords
Keywords: ANOVA, S/N Ratio, TiO2 based flux, FIS