9 research outputs found

    Free vibrational analysis of curved beam with uniform rectangular cross section

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    Curved beams are plays an important role in different field like house roofing, bridges, cranes, automobiles chasses etc. The study deals with the investigation of free vibrations of thick curved beams of SS316 and MS1018, both experimentally and using ANSYS. The curved beams having different R/t ratio were fabricated by using mild steel material. Three different boundary conditions are imposed for curved beams are as follows; free-free, clamped-free, clamped-clamped. For experimental investigation, magnetic transducer and VIBXpert are used to conduct experiment on different curved beams. The present work also aims at developing anumerical model for comparing ANSYS results with experimental results to analyze the frequencies and mode shapes corresponding to three different boundary conditions. The curved beam were modelled, meshed and analyzed using ANSYS. The first ten natural frequencies from finite element solutions are then compared with the experimental results. These effects also become more significant for higher modes. It is also observed that the finite element solutions are closely in agreement with experimental results

    An Investigation on Strength of SS316L and Cobalt- Chromium used as cardio Vascular Stent materials by nonlinear FEA

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    Aim of this study is to provide a computational approach for evaluating the effect of Stents on biomechanical outcome of deployment of stent in different condition. Nonlinear FEA software has been used successfully on balloon expandable stents. Projects often require modelling systems that consist of multiple components with nonlinear materials, complex 3D geometries. The ABACUS, handles the full range of nonlinear material properties for the stent, the catheter balloon, and the artery wall. The objective of research carried out was to simulate the mechanical behaviour of the stent using finite element analysis. Implantation and in vivo loading are considered. Finite element analysis provides a quick and cost-effective method for evaluating stent performance, yielding accurate information about the expanded geometry and the stress and strain deformation fields with in the stent for various loading conditions. With appropriate applied internal pressure, the balloon inside the stent is deployed which linearlyexpands the diameter of a Modular Stent until it reaches 1.7 times of its original diameter. The results will assist in the development of novel stent designs and stent deployment to minimize vascular injury during stenting and reduce restenosis. The results obtained for the selected stent material are compared. The Cobalt-chromium undergone plastic deformation at 0.44 MPa and SS316L at 0.3 MPa pressure load

    A study on Mechanical properties of Vinylester based bio composite with Starch as filler material

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    In composites a conglomeration produces material properties which are unavailable from individual constituent materials. The use of petroleum based products as constituents in polymer matrix composite has raised concerns regarding environmental issue and non -renewability of the resource. Therefore in this work an attempt has been made to develop a biocomposite material using untreated dupion silk fiber as reinforcement material and vinyl ester as matrix material with Potato Starch used as filler material by hand layup technique.The biocomposites were prepared in varying percentage of filler addition (0%, 10%, 20%, and 30%) and different mechanical tests (tensile, flexure and hardness) were conducted on the samples prepared to the ASTM standards.From the results of the experiments conducted on the specimen it can be concluded that the performance of 10% Starch filler content Biocomposite is satisfactory in all aspects compared to 0%, 20%, and 30% Starch filler content Biocomposites

    Investigation of Mechanical properties on Vinylester based bio composite with Gelatin as randomly distributed filler material)

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    In the present work an attempt has been made to develop Bio-composite Material using raw dupion silk fiber reinforced vinylester matrix in addition with gelatin as filler material with varying percentage using hand lay-up method. The experiments namely tensile, flexural and hardness test were conducted on the standard samples prepared. An appreciable improvement was found in the mechanical properties of the Bio-composite, which can be used for variety of applications in the human bone replacement. The biocomposites were prepared in varying percentage of filler addition (0%, 10%, 20%, and 30%) and different mechanical tests (tensile, flexure and ardness) were conducted on the samples prepared as per ASTM standards. According to literature survey the human femur bone with tensile strength for female is 30.08±7.96MPa. In this work it was found that tensile strength of 30% gelatin filled with Dupion silk fiber reinforced vinylester bio-composite material is 26.86 MPa

    Investigation on SS316, and SS440C and Titanium alloy Grade-5 used as a single point cutting tool

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    The main objective of this work is to find alternative materials for the cutting tools used in turning operations. The conventional materials like tungsten carbide(WC), titanium carbide(TiC), cubic boron nitride (CBN) and diamond used as cutting tools for turning operations on lathe are expensive. Titanium grade 5 (Ti-6Al-4V), SS440C/AISI440C and SS316 are some of the materials which satisfy the necessary requirements for turning metals and polymer materials. These materials are machined as per the standard tool signature of high-speed steel tool (HSS) and are subjected to necessary heat treatment for hardening and then finish ground. The machined tools thus prepared were used to turn mild steel and aluminium workpieces. The cutting forces at play are determined using lathe tool dynamometer and plotted on a MCD (Merchant’s Circle Diagram). The cutting tools are also subjected to tests to determine tool life, wear and work hardening. It is found that the performance and tool life of SS440C is better and cost effective compared to existing tools. Even though Ti-6Al-4V is comparatively costly it could be used for obtaining good surface finish

    Strength analysis & comparison of SS316L, Ti-6Al-4V & Ti-35Nb-7Zr-5Ta used as orthopaedic implant materials by FEA

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    Femur is leg bone of the human body undergoing more deformation. Being longest and heaviest in size, failure of femur neck is the most common among bone failures in human especially in woman. Orthopedic implantation is done in case of failure. Before implantation it is necessary to analyze the perfectness in case of its material property, size and shape, surface treatment, load resistance and chances of failure. Analysis is done for the stresses formed in femur implant of SS316L, Ti-6Al-4V & Ti-35Nb-7Zr-5Ta materials under static loading condition using NASTRON software. Since each femur carries full body weight, analysis is done for 25kg, 50kg, 100kg, 200kg loads, including the cases of patient carrying certain weight. From analysis it is found that the loads have no effect on failure of implant, since the values of stresses and deformation are very low. Thus failure of implant is maximum by wearing, corrosion and all due to improper material selection of implant. And based on the analysis it can be concluded that, the displacement of the femur cup Ti-35Nb-7Zr-5Ta inside the bone socket is acceptable and well within the limits for implantation, it makes the patient feel free to move his leg. Analysis is done for the stresses formed in femur implant of Ti- 6Al-4V & SS316L materials under static loading using FEA techniques. Since each femur carries half of the body weight, we have taken the extreme weights, that is, the least possible weight and the heaviest possible weight. From analysis it is found that the loads have no effect on failure of implant since the values of stresses and deformation are very negligible. Since TI-6AL-4V & Ti-35Nb-7Zr-5Ta are low density materials compared to SS316L, which have excellent bio compatible and mechanical properties, it is ideal for the use of an implant in surgeries. Based on the analysis SS316L is a high density material (7970kg/m3) for implantation, it makes the patient feel heavy to move his leg. It will further lead to infection and disorders like wearing, loosening of implant, bone swelling, thus effecting bone tissue. Finally the success of implantation depends on implant material and size, implantation method and its handling by the patient. © 2010 IEEE

    Analytical Investigationand Comparision on Performance of SS316, SS440c and Titanium Alloy Tool Materials Used as Single point Cutting tool

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    Theoretical analysis for performance studies of SS316, SS44OC and Titanium Alloy used as a cutting tool is presented in this paper. Tool temperature, tools wear and life of the tool is investigated analytically. These theoretical values are compared with the experimental studies conducted by the author. The values obtained from experimental studies are comparable with analytical values and variation is the correlation between theoretical and experimental values is of the order of 15%
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