Rino Nelson - Academia.edu (original) (raw)
Papers by Rino Nelson
International Journal of Pressure Vessels and Piping
Engineering Innovations, Feb 15, 2023
Springer proceedings in complexity, 2022
Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science, Oct 7, 2022
Advances in Materials and Processing Technologies
Materials Today: Proceedings
2022 2nd International Conference on Artificial Intelligence and Signal Processing (AISP)
Lungs being an important organ in the respiratory system, it is prone to many chronic diseases in... more Lungs being an important organ in the respiratory system, it is prone to many chronic diseases involving tumor cells. These lung tumors are treatable, if diagnosed at early stage. Among lung tumors, the non-small cell category is irresponsive even for chemotherapy treatment when diagnosed at later stage. This work concentrates on improving the diagnosis of non-small tumor cells at early stage through image processing techniques. The CT image of lungs is used for discriminating the tumor cells from healthy non-tumor cells. Upon using computer aided image processing techniques, the level of accuracy in assessing the tumor cells can be improved. Initially, the noise present in the CT image is removed using Wiener filter by improving the signal to noise ratio. The vascular structures in the image are removed and possible tumor cells are segmented from other healthy cells using region growing technique. After extracting the features, the Support Vector Machine and Naïve Bayesian techniques are used for classifying the tumor cells and healthy cells.
Lecture notes in civil engineering, Oct 5, 2022
Materials Today: Proceedings
Iranian Journal of Science and Technology, Transactions of Mechanical Engineering, 2022
2nd International Conference on Mechanical, Manufacturing and Process Plant Engineering, 2017
Owing to increase in the demand for power, a number of power plants have been installed in the re... more Owing to increase in the demand for power, a number of power plants have been installed in the recent past. One of the vital components in these plants is gasketed flange joint. The behaviour of gasketed flange joint is highly dependent on the deformation characteristics of gasket material. In the present study, the deformation characteristic of spiral wound gasket along thickness direction is determined experimentally for different loading rates. Gasket has high nonlinearity under both loading and unloading, with hysteresis. Based on its characteristics, the flange joint is analysed to study its performance and leakage behaviour under static condition. 3D finite element model of flange joint is developed by considering the gasket as interface entity. Finite element analysis of flange joint is performed by including the nonlinear hysteretic behaviour of gasket, under different loading rate and frictional contact between joint members. The influence of different loading and unloading rates is emphasized on the sealing performance of flange joint using leakage pressure. The gasket deforms more when loaded at low rate. This phenomenon also affects the ability to withstand internal fluid without leakage. The maximum safe pressure without leakage increases, when gasket is loaded and unloaded at low rate.
Proceedings of the Institution of Mechanical Engineers, Part E: Journal of Process Mechanical Engineering, 2017
Leakage is the main mode of failure in gasketed flange joints used in nuclear and thermal power p... more Leakage is the main mode of failure in gasketed flange joints used in nuclear and thermal power plants. The leakage occurs when the joint is not able to withstand the internal fluid pressure. To evaluate the leakage behavior of gasketed flange joint, it is important to incorporate gasket properties and interfacial contact behavior due to friction. However, for safe joint operation, the members also should be structurally sound without exceeding allowable limit of materials. In this study, the joint strength and sealing behavior of gasketed flange joint are investigated through experiments by carrying out leakage test. The joint strength is evaluated based on strains developed in flanges along longitudinal and tangential direction under both pretightening and pressurizing stages. Three-dimensional finite element simulation is also performed under both aforesaid stages, considering the nonlinear properties of gasket along with hysteresis during unloading. The finite element results of...
Journal of Pressure Vessel Technology, 2017
Gasketed flange joints are widely used in pressure vessels and piping systems. They are subjected... more Gasketed flange joints are widely used in pressure vessels and piping systems. They are subjected to bending load due to differential thermal expansion, wind load, self-weight, etc., in addition to assembly and internal fluid load. Most of the flange designs are based on equivalent pressure method to include the effect of external bending loads. The behavior of gasketed flange joint is complex due to the nonlinear hysteretic behavior of gasket material and contact interfaces between joint members. It becomes more complex when the joint is subjected to bending load at elevated temperatures. In the present work, performance of a flange joint has been studied under internal pressure and external bending load at elevated temperatures. A 3D finite element model is developed, considering the nonlinearities in the joint due to gasket material and contact between its members along with their temperature-dependent material properties. The performance of joint under different bolt preloads, i...
International Journal of Pressure Vessels and Piping, 2016
Abstract Sealing performance of gasketed flange joints depends mainly on the behavior of gasket. ... more Abstract Sealing performance of gasketed flange joints depends mainly on the behavior of gasket. In the present work, a three dimensional finite element analysis has been carried on a gasketed joint with single and twin gaskets having nonlinear material properties, to find the influence of gasket contact stress and sealing performance of the joint. Bolt preload required for safe operation of twin gasketed joints has been formulated by modifying the ASME code. A comparison is made on sealing performance of gasketed joint with single and twin gaskets. The contact pressure of twin gasketed joint is examined by varying the design parameters such as individual gasket widths and space between the gaskets. Contact pressure in single and twin gasketed flange joints at different operating conditions, viz., bolt preload and internal pressure have been investigated. It is observed that the flange joint with twin gasket can withstand higher internal pressure.
Proceedings of the Institution of Mechanical Engineers, Part E: Journal of Process Mechanical Engineering, 2016
Gasketed flange joints are usually subjected to internal pressure at high temperature. The most i... more Gasketed flange joints are usually subjected to internal pressure at high temperature. The most important requirement of flange joint is to provide leak-free joint under operating condition. In the present study, temperature-dependent nonlinear gasket properties of spiral-wound gasket at elevated temperatures are obtained experimentally and included in the analysis. The relaxation of gasket contact stress in both single and twin-gasketed joints at elevated temperatures is compared. It is observed that the ability to withstand internal pressure decreases with increase in temperature in both single and twin-gasketed flange joints. But, the twin-gasketed flange joint is found to withstand higher internal pressure than single-gasketed joint at a given bolt preload and temperature. The influence of gasket seating surface rotation on the distribution of gasket radial contact stress at elevated temperature is studied. The effect of elevated temperature on flange stresses of twin-gasketed j...
Gasketed flange joint is a vital component in pressure vessels and piping systems. Flange joint i... more Gasketed flange joint is a vital component in pressure vessels and piping systems. Flange joint is usually subjected to bending load due to expansion, wind load, self-weight, etc. Most of the flange design methods use equivalent pressure to include the effect of external bending loads. It becomes complex when the joint is subjected to bending load at elevated temperatures, due to the nonlinear behavior of gasket material. In the present work, performance of the flange joint has been studied under external bending load at elevated temperatures. A 3D finite element model is developed, considering the nonlinearities in the joint due to gasket material and contact between its members along with their temperature dependent material properties. The performance of the joint under different bolt preloads, internal fluid pressures and temperatures is studied. Flange joint with two gaskets (twin gasketed joint) placed beside each other radially, is also analyzed under external bending moment....
E3S Web of Conferences
Pressure vessels such as steam generators are subjected to high temperature, in addition to high ... more Pressure vessels such as steam generators are subjected to high temperature, in addition to high pressure during the operating condition. Flanges and bolts are made up of different materials whose coefficient of thermal expansion varies. Usually, thermal expansion in bolts is greater than that of flanges. At elevated temperatures bolts expand more than that of flanges, resulting in decrease of compression in connected members achieved during assembly stage, which in turn decreases the contact stress in gasket. This can lead to leakage of internal fluid. The loss in gasket contact stress due to differential thermal expansion can be nullified by using sleeves of higher thermal expansion between the flange-nut and flange-bolt head interfaces. At higher temperatures sleeves expand more than bolts and flanges, pushing the flanges closer towards each other, thus decreasing gap created due to differential thermal expansion. The behaviour of gasketed blind flange joint with and without slee...
Materialwissenschaft und Werkstofftechnik
Materials Today: Proceedings
An asymptotic analysis is presented for the power law creep of a matrix containing + + + j + + +/... more An asymptotic analysis is presented for the power law creep of a matrix containing + + + j + + +/-/ Stresska
International Journal of Pressure Vessels and Piping
Engineering Innovations, Feb 15, 2023
Springer proceedings in complexity, 2022
Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science, Oct 7, 2022
Advances in Materials and Processing Technologies
Materials Today: Proceedings
2022 2nd International Conference on Artificial Intelligence and Signal Processing (AISP)
Lungs being an important organ in the respiratory system, it is prone to many chronic diseases in... more Lungs being an important organ in the respiratory system, it is prone to many chronic diseases involving tumor cells. These lung tumors are treatable, if diagnosed at early stage. Among lung tumors, the non-small cell category is irresponsive even for chemotherapy treatment when diagnosed at later stage. This work concentrates on improving the diagnosis of non-small tumor cells at early stage through image processing techniques. The CT image of lungs is used for discriminating the tumor cells from healthy non-tumor cells. Upon using computer aided image processing techniques, the level of accuracy in assessing the tumor cells can be improved. Initially, the noise present in the CT image is removed using Wiener filter by improving the signal to noise ratio. The vascular structures in the image are removed and possible tumor cells are segmented from other healthy cells using region growing technique. After extracting the features, the Support Vector Machine and Naïve Bayesian techniques are used for classifying the tumor cells and healthy cells.
Lecture notes in civil engineering, Oct 5, 2022
Materials Today: Proceedings
Iranian Journal of Science and Technology, Transactions of Mechanical Engineering, 2022
2nd International Conference on Mechanical, Manufacturing and Process Plant Engineering, 2017
Owing to increase in the demand for power, a number of power plants have been installed in the re... more Owing to increase in the demand for power, a number of power plants have been installed in the recent past. One of the vital components in these plants is gasketed flange joint. The behaviour of gasketed flange joint is highly dependent on the deformation characteristics of gasket material. In the present study, the deformation characteristic of spiral wound gasket along thickness direction is determined experimentally for different loading rates. Gasket has high nonlinearity under both loading and unloading, with hysteresis. Based on its characteristics, the flange joint is analysed to study its performance and leakage behaviour under static condition. 3D finite element model of flange joint is developed by considering the gasket as interface entity. Finite element analysis of flange joint is performed by including the nonlinear hysteretic behaviour of gasket, under different loading rate and frictional contact between joint members. The influence of different loading and unloading rates is emphasized on the sealing performance of flange joint using leakage pressure. The gasket deforms more when loaded at low rate. This phenomenon also affects the ability to withstand internal fluid without leakage. The maximum safe pressure without leakage increases, when gasket is loaded and unloaded at low rate.
Proceedings of the Institution of Mechanical Engineers, Part E: Journal of Process Mechanical Engineering, 2017
Leakage is the main mode of failure in gasketed flange joints used in nuclear and thermal power p... more Leakage is the main mode of failure in gasketed flange joints used in nuclear and thermal power plants. The leakage occurs when the joint is not able to withstand the internal fluid pressure. To evaluate the leakage behavior of gasketed flange joint, it is important to incorporate gasket properties and interfacial contact behavior due to friction. However, for safe joint operation, the members also should be structurally sound without exceeding allowable limit of materials. In this study, the joint strength and sealing behavior of gasketed flange joint are investigated through experiments by carrying out leakage test. The joint strength is evaluated based on strains developed in flanges along longitudinal and tangential direction under both pretightening and pressurizing stages. Three-dimensional finite element simulation is also performed under both aforesaid stages, considering the nonlinear properties of gasket along with hysteresis during unloading. The finite element results of...
Journal of Pressure Vessel Technology, 2017
Gasketed flange joints are widely used in pressure vessels and piping systems. They are subjected... more Gasketed flange joints are widely used in pressure vessels and piping systems. They are subjected to bending load due to differential thermal expansion, wind load, self-weight, etc., in addition to assembly and internal fluid load. Most of the flange designs are based on equivalent pressure method to include the effect of external bending loads. The behavior of gasketed flange joint is complex due to the nonlinear hysteretic behavior of gasket material and contact interfaces between joint members. It becomes more complex when the joint is subjected to bending load at elevated temperatures. In the present work, performance of a flange joint has been studied under internal pressure and external bending load at elevated temperatures. A 3D finite element model is developed, considering the nonlinearities in the joint due to gasket material and contact between its members along with their temperature-dependent material properties. The performance of joint under different bolt preloads, i...
International Journal of Pressure Vessels and Piping, 2016
Abstract Sealing performance of gasketed flange joints depends mainly on the behavior of gasket. ... more Abstract Sealing performance of gasketed flange joints depends mainly on the behavior of gasket. In the present work, a three dimensional finite element analysis has been carried on a gasketed joint with single and twin gaskets having nonlinear material properties, to find the influence of gasket contact stress and sealing performance of the joint. Bolt preload required for safe operation of twin gasketed joints has been formulated by modifying the ASME code. A comparison is made on sealing performance of gasketed joint with single and twin gaskets. The contact pressure of twin gasketed joint is examined by varying the design parameters such as individual gasket widths and space between the gaskets. Contact pressure in single and twin gasketed flange joints at different operating conditions, viz., bolt preload and internal pressure have been investigated. It is observed that the flange joint with twin gasket can withstand higher internal pressure.
Proceedings of the Institution of Mechanical Engineers, Part E: Journal of Process Mechanical Engineering, 2016
Gasketed flange joints are usually subjected to internal pressure at high temperature. The most i... more Gasketed flange joints are usually subjected to internal pressure at high temperature. The most important requirement of flange joint is to provide leak-free joint under operating condition. In the present study, temperature-dependent nonlinear gasket properties of spiral-wound gasket at elevated temperatures are obtained experimentally and included in the analysis. The relaxation of gasket contact stress in both single and twin-gasketed joints at elevated temperatures is compared. It is observed that the ability to withstand internal pressure decreases with increase in temperature in both single and twin-gasketed flange joints. But, the twin-gasketed flange joint is found to withstand higher internal pressure than single-gasketed joint at a given bolt preload and temperature. The influence of gasket seating surface rotation on the distribution of gasket radial contact stress at elevated temperature is studied. The effect of elevated temperature on flange stresses of twin-gasketed j...
Gasketed flange joint is a vital component in pressure vessels and piping systems. Flange joint i... more Gasketed flange joint is a vital component in pressure vessels and piping systems. Flange joint is usually subjected to bending load due to expansion, wind load, self-weight, etc. Most of the flange design methods use equivalent pressure to include the effect of external bending loads. It becomes complex when the joint is subjected to bending load at elevated temperatures, due to the nonlinear behavior of gasket material. In the present work, performance of the flange joint has been studied under external bending load at elevated temperatures. A 3D finite element model is developed, considering the nonlinearities in the joint due to gasket material and contact between its members along with their temperature dependent material properties. The performance of the joint under different bolt preloads, internal fluid pressures and temperatures is studied. Flange joint with two gaskets (twin gasketed joint) placed beside each other radially, is also analyzed under external bending moment....
E3S Web of Conferences
Pressure vessels such as steam generators are subjected to high temperature, in addition to high ... more Pressure vessels such as steam generators are subjected to high temperature, in addition to high pressure during the operating condition. Flanges and bolts are made up of different materials whose coefficient of thermal expansion varies. Usually, thermal expansion in bolts is greater than that of flanges. At elevated temperatures bolts expand more than that of flanges, resulting in decrease of compression in connected members achieved during assembly stage, which in turn decreases the contact stress in gasket. This can lead to leakage of internal fluid. The loss in gasket contact stress due to differential thermal expansion can be nullified by using sleeves of higher thermal expansion between the flange-nut and flange-bolt head interfaces. At higher temperatures sleeves expand more than bolts and flanges, pushing the flanges closer towards each other, thus decreasing gap created due to differential thermal expansion. The behaviour of gasketed blind flange joint with and without slee...
Materialwissenschaft und Werkstofftechnik
Materials Today: Proceedings
An asymptotic analysis is presented for the power law creep of a matrix containing + + + j + + +/... more An asymptotic analysis is presented for the power law creep of a matrix containing + + + j + + +/-/ Stresska