The Experts below are selected from a list of 174 Experts worldwide ranked by ideXlab platform
S.c. Sharma - One of the best experts on this subject based on the ideXlab platform.
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Development of MoSi2-SiC Component for Satellite Launch Vehicle
International Scholarly Research Notices, 2012Co-Authors: G. P. Khanra, S. Girikumar, D. K. Mishra, T. T. Sarvanan, S.c. SharmaAbstract:Intermetallic base MoSi2-SiC composite, an excellent high temperature oxidation-resistant material meant for the aerospace structural applications between 1600°C and 1700°C under oxidizing environment, has been developed successfully using powder metallurgy techniques. Mechanically milled (MM) MoSi2 powder, blended with SiC particulate was consolidated by vacuum hot pressing, yielded about 98.5% theoretical density. The composite has been characterized for physical, mechanical, and thermal properties. Properties were found satisfactory. Machining of semis to Intricate Shape was possible through electro-discharge machining (EDM) process. Plasma arc jet test (PAJT) under argon and argon
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mechanical properties of wet coagulated alumina bodies prepared by direct coagulation casting using a mgo coagulating agent
Journal of the American Ceramic Society, 2008Co-Authors: Kuttan Prabhakaran, Anand Melkeri, Nitin Madhusudan Gokhale, Shekhar Parshuram Tambe, S.c. SharmaAbstract:High strength and Young's modulus of wet-coagulated bodies is key to the success of a direct coagulation casting (DCC) process. The yield strength and Young's modulus of wet-coagulated alumina bodies prepared at various concentrations of ammonium poly(acrylate) dispersant and MgO coagulating agent has been evaluated. The yield strength and Young's modulus of the wet-coagulated bodies, prepared at a MgO concentration equivalent to react with the dispersant, increased with an increase in the dispersant concentration due to the binding of alumina particles by the Mg-poly(acrylate) formed by the reaction between the dispersant and MgO. Addition of MgO higher than the equivalent amount to react with the dispersant increased the yield strength, Young's modulus, and brittleness of the wet-coagulated bodies. This is due to a combination of an increase in the cohesive force between particles and a decrease in homogeneity of the particle network in the wet-coagulated body induced by heterocoagulation of alumina and MgO particles having opposite surface charges. The high yield strength (up to 472 kPa) and Young's modulus (up to 110 MPa) achieved would facilitate easy and successful removal of the wet-coagulated bodies even from Intricate Shape molds.
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Mechanical Properties of Wet‐Coagulated Alumina Bodies Prepared by Direct Coagulation Casting Using a MgO Coagulating Agent
Journal of the American Ceramic Society, 2008Co-Authors: Kuttan Prabhakaran, Anand Melkeri, Nitin Madhusudan Gokhale, Shekhar Parshuram Tambe, S.c. SharmaAbstract:High strength and Young's modulus of wet-coagulated bodies is key to the success of a direct coagulation casting (DCC) process. The yield strength and Young's modulus of wet-coagulated alumina bodies prepared at various concentrations of ammonium poly(acrylate) dispersant and MgO coagulating agent has been evaluated. The yield strength and Young's modulus of the wet-coagulated bodies, prepared at a MgO concentration equivalent to react with the dispersant, increased with an increase in the dispersant concentration due to the binding of alumina particles by the Mg-poly(acrylate) formed by the reaction between the dispersant and MgO. Addition of MgO higher than the equivalent amount to react with the dispersant increased the yield strength, Young's modulus, and brittleness of the wet-coagulated bodies. This is due to a combination of an increase in the cohesive force between particles and a decrease in homogeneity of the particle network in the wet-coagulated body induced by heterocoagulation of alumina and MgO particles having opposite surface charges. The high yield strength (up to 472 kPa) and Young's modulus (up to 110 MPa) achieved would facilitate easy and successful removal of the wet-coagulated bodies even from Intricate Shape molds.
Kuttan Prabhakaran - One of the best experts on this subject based on the ideXlab platform.
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mechanical properties of wet coagulated alumina bodies prepared by direct coagulation casting using a mgo coagulating agent
Journal of the American Ceramic Society, 2008Co-Authors: Kuttan Prabhakaran, Anand Melkeri, Nitin Madhusudan Gokhale, Shekhar Parshuram Tambe, S.c. SharmaAbstract:High strength and Young's modulus of wet-coagulated bodies is key to the success of a direct coagulation casting (DCC) process. The yield strength and Young's modulus of wet-coagulated alumina bodies prepared at various concentrations of ammonium poly(acrylate) dispersant and MgO coagulating agent has been evaluated. The yield strength and Young's modulus of the wet-coagulated bodies, prepared at a MgO concentration equivalent to react with the dispersant, increased with an increase in the dispersant concentration due to the binding of alumina particles by the Mg-poly(acrylate) formed by the reaction between the dispersant and MgO. Addition of MgO higher than the equivalent amount to react with the dispersant increased the yield strength, Young's modulus, and brittleness of the wet-coagulated bodies. This is due to a combination of an increase in the cohesive force between particles and a decrease in homogeneity of the particle network in the wet-coagulated body induced by heterocoagulation of alumina and MgO particles having opposite surface charges. The high yield strength (up to 472 kPa) and Young's modulus (up to 110 MPa) achieved would facilitate easy and successful removal of the wet-coagulated bodies even from Intricate Shape molds.
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Mechanical Properties of Wet‐Coagulated Alumina Bodies Prepared by Direct Coagulation Casting Using a MgO Coagulating Agent
Journal of the American Ceramic Society, 2008Co-Authors: Kuttan Prabhakaran, Anand Melkeri, Nitin Madhusudan Gokhale, Shekhar Parshuram Tambe, S.c. SharmaAbstract:High strength and Young's modulus of wet-coagulated bodies is key to the success of a direct coagulation casting (DCC) process. The yield strength and Young's modulus of wet-coagulated alumina bodies prepared at various concentrations of ammonium poly(acrylate) dispersant and MgO coagulating agent has been evaluated. The yield strength and Young's modulus of the wet-coagulated bodies, prepared at a MgO concentration equivalent to react with the dispersant, increased with an increase in the dispersant concentration due to the binding of alumina particles by the Mg-poly(acrylate) formed by the reaction between the dispersant and MgO. Addition of MgO higher than the equivalent amount to react with the dispersant increased the yield strength, Young's modulus, and brittleness of the wet-coagulated bodies. This is due to a combination of an increase in the cohesive force between particles and a decrease in homogeneity of the particle network in the wet-coagulated body induced by heterocoagulation of alumina and MgO particles having opposite surface charges. The high yield strength (up to 472 kPa) and Young's modulus (up to 110 MPa) achieved would facilitate easy and successful removal of the wet-coagulated bodies even from Intricate Shape molds.
Petr Tiller - One of the best experts on this subject based on the ideXlab platform.
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Evaluation of Draw Beads Influence on Intricate Shape Stamping Drawing Process
Technological Engineering, 2014Co-Authors: Radek Čada, Petr TillerAbstract:Abstract Paper concerns evaluation of influence of Shape, size and location of rectangular and semicircular draw beads on sheet-metal forming process. For analysis the simulations of forming process of selected two types of Intricate Shape stampings with similar ground plan and with approximately the same height from steel strip DC04 with the use of models of optimal blanks made by BSE (Blank Size Engineering) modul of simulation program Dynaform 5.7 were carried out. From simulations of forming process in simulation program Dynaform 5.7 followed that the most suitable is drawing without use of draw beads because cracks in stamping bottom corners do not arise. In the case of undesirable secondary waviness in the walls of Intricate Shape stamping the drawing with draw beads could be used but it would be necessary to increase the radius at the bottom of both stampings alternatively to choose another material with higher formability.
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springback analysis of Intricate Shape stamping from various materials with the use of finite elements method
Transactions of the VŠB - Technical University of Ostrava Mechanical Series, 2012Co-Authors: Radek Cada, Petr TillerAbstract:Clanek se týka řeseni operace taženi vcetně s tim souvisejicim nasledným odpruženim výtažku nepravidelneho tvaru z tenkeho plechu – vnitřni výztuhy B-sloupku karoserie automobilu za ucelem dosaženi po procesu taženi rozměrů a toleranci výtažku, ktere jsou předepsany na výkresu soucasti. Simulace plosneho tvařeni a nasledne simulace odpruženi byly provaděny s využitim programu PAM-STAMP 2G 2011, který využiva metodu konecných prvků. V clanku je podrobně popsana simulace procesu tvařeni B-sloupku karoserie automobilu v tomto programu, volba vhodneho řesice pro jednotlive etapy simulace, nasledne simulace velikosti odpruženi pro ctyři druhy pasových oceli při použiti dvou zvolených meshovacich strategii a jejich vzajemne porovnani. Pro daný typ výtažku byly vyhodnoceny nejvhodnějsi pasove oceli z hlediska lisovatelnosti a dosaženi minimalni velikosti odpruženi. V zavěru clanku je popsan způsob laděni rozměrů tažneho nastroje za ucelem dosaženi stavu, kdy tvarove odchylky konecneho výtažku odpovidaji předepsaným tolerancim na výkresu soucasti.
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springback analysis of Intricate Shape stamping from various materials with the use of finite elements method analýza odpruženi výtažku nepravidelneho tvaru z různých materialů s využitim metody konecných prvků
2012Co-Authors: Petr TillerAbstract:Paper concerns drawing operation including related consequent springback of Intricate Shape stamping from thin sheet-metal - internal reinforcement of car bodyshell B-pillar in order to keep after drawing process the dimensions and tolerances of stamping after drawing process which are given in part drawing. Simulation of drawing process and consequent springback simulations were carried out in CAE software PAM-STAMP 2G 2011 which uses finite element method. In contribution the drawing process simulation of car bodyshell B-pillar is detailly described in this program, choice of suitable solver for separate drawing simulation stages, consequent springback simulations for four strip steels with the use of two mesh strategies and their mutual comparison. For given stamping Shape the best strip steels were evaluated from point of view of drawability and reaching minimal springback size. In the end of the paper the method of tuning of sizes of drawing tool in order to achieve the state when final stamping deviations will correspond to tolerances specified at part drawing is described. Abstrakt Clanek se týka řeseni operace taženi vcetně s tim souvisejicim nasledným odpruženim výtažku nepravidelneho tvaru z tenkeho plechu - vnitřni výztuhy B-sloupku karoserie automobilu za ucelem dosaženi po procesu taženi rozměrů a toleranci výtažku, ktere jsou předepsany na výkresu soucasti. Simulace plosneho tvařeni a nasledne simulace odpruženi byly provaděny s využitim programu PAM-STAMP 2G 2011, který využiva metodu konecných prvků. V clanku je podrobně popsana simulace procesu tvařeni B-sloupku karoserie automobilu v tomto programu, volba vhodneho řesice pro jednotlive etapy simulace, nasledne simulace velikosti odpruženi pro ctyři druhy pasových oceli při použiti dvou zvolených meshovacich strategii a jejich vzajemne porovnani. Pro daný typ výtažku byly vyhodnoceny nejvhodnějsi pasove oceli z hlediska lisovatelnosti a dosaženi minimalni velikosti odpruženi. V zavěru clanku je popsan způsob laděni rozměrů tažneho nastroje za ucelem dosaženi stavu, kdy tvarove odchylky konecneho výtažku odpovidaji předepsaným tolerancim na výkresu soucasti.
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tuning of Intricate Shape stamping Shape and dimensions with the use of drawing process simulations
Transactions of the VŠB - Technical University of Ostrava Mechanical Series, 2011Co-Authors: Radek Cada, Petr TillerAbstract:Clanek se zabýva postupem tvorby modelu výtažku nepravidelneho tvaru z tenkeho plechu – vnitřni výztuha B-sloupku karoserie automobilu pro simulace plosneho tvařeni a nasledně postupem laděni jeho kritických rozměrů za ucelem dodrženi rozměrů a toleranci výtažku po procesu taženi, ktere jsou předepsany na výrobnim výkresu. Rozměry výtažku po taženi byly zjisťovany pomoci simulaci procesu taženi CAE programem Dynaform 5.7, který využiva metodu konecných prvků. U tohoto programu výsledky simulace procesu taženi dosahuji v porovnani s realným procesem uspokojive shody. V clanku je popsana simulace procesu tvařeni výtažku B-sloupku karoserie automobilu, postup transformace zadaneho modelu v digitalni podobě a vyhodnoceni výsledků taženi pomoci software Dynaform 5.7. Dale je popsan postup vyhodnocovani skutecných rozměrů výtažku v porovnani se simulovaným procesem taženi při použiti CAD programů a vzajemným převodem vytvořených dat mezi nimi. Na konci clanku je uveden postup laděni rozměrů výtažku korekci casti tažneho nastroje pro splněni vsech toleranci, ktere jsou předepsany na výrobnim výkresu.
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tuning of Intricate Shape stamping Shape and dimensions with the use of drawing process simulations laděni tvaru a rozměrů výtažku nepravidelneho tvaru pomoci simulaci procesu taženi
2011Co-Authors: Petr TillerAbstract:The paper deals with the process of creation of model of Intricate Shape stamping from thin sheet-metal - internal reinforcement of car bodyshell B-pillar for flat forming simulations and subsequently with the procedure of its critical dimensions tuning in order to keep the dimensions and tolerances of stamping after drawing process which are given in production drawing. The dimensions of stamping after drawing were evaluated by simulations of drawing process in CAE software Dynaform 5.7 which uses finite elements method. At this software the results of drawing process simulation achieved in comparison with the real process satisfactory results. In the paper the simulation of drawing process of car bodyshell B-pillar stamping is described, the procedure of transformation of given model in digital form and evaluation of drawing results by Dynaform 5.7 software. Also the procedure of the real stamping proportions evaluation compared with the simulated drawing process with the use of CAD software and reciprocal transfer of datas between them. In the end of the paper the procedure of stamping dimensions tuning by corrections of drawing tool parts for fulfilment of all tolerances which are specified in the product drawing is described. Abstrakt Clanek se zabýva postupem tvorby modelu výtažku nepravidelneho tvaru z tenkeho plechu - vnitřni výztuha B-sloupku karoserie automobilu pro simulace plosneho tvařeni a nasledně postupem laděni jeho kritických rozměrů za ucelem dodrženi rozměrů a toleranci výtažku po procesu taženi, ktere jsou předepsany na výrobnim výkresu. Rozměry výtažku po taženi byly zjisťovany pomoci simulaci procesu taženi CAE programem Dynaform 5.7, který využiva metodu konecných prvků. U tohoto programu výsledky simulace procesu taženi dosahuji v porovnani s realným procesem uspokojive shody. V clanku je popsana simulace procesu tvařeni výtažku B-sloupku karoserie automobilu, postup transformace zadaneho modelu v digitalni podobě a vyhodnoceni výsledků taženi pomoci software Dynaform 5.7. Dale je popsan postup vyhodnocovani skutecných rozměrů výtažku v porovnani se simulovaným procesem taženi při použiti CAD programů a vzajemným převodem vytvořených dat mezi nimi. Na konci clanku je uveden postup laděni rozměrů výtažku korekci casti tažneho nastroje pro splněni vsech toleranci, ktere jsou předepsany na výrobnim výkresu.
Anand Melkeri - One of the best experts on this subject based on the ideXlab platform.
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mechanical properties of wet coagulated alumina bodies prepared by direct coagulation casting using a mgo coagulating agent
Journal of the American Ceramic Society, 2008Co-Authors: Kuttan Prabhakaran, Anand Melkeri, Nitin Madhusudan Gokhale, Shekhar Parshuram Tambe, S.c. SharmaAbstract:High strength and Young's modulus of wet-coagulated bodies is key to the success of a direct coagulation casting (DCC) process. The yield strength and Young's modulus of wet-coagulated alumina bodies prepared at various concentrations of ammonium poly(acrylate) dispersant and MgO coagulating agent has been evaluated. The yield strength and Young's modulus of the wet-coagulated bodies, prepared at a MgO concentration equivalent to react with the dispersant, increased with an increase in the dispersant concentration due to the binding of alumina particles by the Mg-poly(acrylate) formed by the reaction between the dispersant and MgO. Addition of MgO higher than the equivalent amount to react with the dispersant increased the yield strength, Young's modulus, and brittleness of the wet-coagulated bodies. This is due to a combination of an increase in the cohesive force between particles and a decrease in homogeneity of the particle network in the wet-coagulated body induced by heterocoagulation of alumina and MgO particles having opposite surface charges. The high yield strength (up to 472 kPa) and Young's modulus (up to 110 MPa) achieved would facilitate easy and successful removal of the wet-coagulated bodies even from Intricate Shape molds.
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Mechanical Properties of Wet‐Coagulated Alumina Bodies Prepared by Direct Coagulation Casting Using a MgO Coagulating Agent
Journal of the American Ceramic Society, 2008Co-Authors: Kuttan Prabhakaran, Anand Melkeri, Nitin Madhusudan Gokhale, Shekhar Parshuram Tambe, S.c. SharmaAbstract:High strength and Young's modulus of wet-coagulated bodies is key to the success of a direct coagulation casting (DCC) process. The yield strength and Young's modulus of wet-coagulated alumina bodies prepared at various concentrations of ammonium poly(acrylate) dispersant and MgO coagulating agent has been evaluated. The yield strength and Young's modulus of the wet-coagulated bodies, prepared at a MgO concentration equivalent to react with the dispersant, increased with an increase in the dispersant concentration due to the binding of alumina particles by the Mg-poly(acrylate) formed by the reaction between the dispersant and MgO. Addition of MgO higher than the equivalent amount to react with the dispersant increased the yield strength, Young's modulus, and brittleness of the wet-coagulated bodies. This is due to a combination of an increase in the cohesive force between particles and a decrease in homogeneity of the particle network in the wet-coagulated body induced by heterocoagulation of alumina and MgO particles having opposite surface charges. The high yield strength (up to 472 kPa) and Young's modulus (up to 110 MPa) achieved would facilitate easy and successful removal of the wet-coagulated bodies even from Intricate Shape molds.
Shekhar Parshuram Tambe - One of the best experts on this subject based on the ideXlab platform.
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mechanical properties of wet coagulated alumina bodies prepared by direct coagulation casting using a mgo coagulating agent
Journal of the American Ceramic Society, 2008Co-Authors: Kuttan Prabhakaran, Anand Melkeri, Nitin Madhusudan Gokhale, Shekhar Parshuram Tambe, S.c. SharmaAbstract:High strength and Young's modulus of wet-coagulated bodies is key to the success of a direct coagulation casting (DCC) process. The yield strength and Young's modulus of wet-coagulated alumina bodies prepared at various concentrations of ammonium poly(acrylate) dispersant and MgO coagulating agent has been evaluated. The yield strength and Young's modulus of the wet-coagulated bodies, prepared at a MgO concentration equivalent to react with the dispersant, increased with an increase in the dispersant concentration due to the binding of alumina particles by the Mg-poly(acrylate) formed by the reaction between the dispersant and MgO. Addition of MgO higher than the equivalent amount to react with the dispersant increased the yield strength, Young's modulus, and brittleness of the wet-coagulated bodies. This is due to a combination of an increase in the cohesive force between particles and a decrease in homogeneity of the particle network in the wet-coagulated body induced by heterocoagulation of alumina and MgO particles having opposite surface charges. The high yield strength (up to 472 kPa) and Young's modulus (up to 110 MPa) achieved would facilitate easy and successful removal of the wet-coagulated bodies even from Intricate Shape molds.
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Mechanical Properties of Wet‐Coagulated Alumina Bodies Prepared by Direct Coagulation Casting Using a MgO Coagulating Agent
Journal of the American Ceramic Society, 2008Co-Authors: Kuttan Prabhakaran, Anand Melkeri, Nitin Madhusudan Gokhale, Shekhar Parshuram Tambe, S.c. SharmaAbstract:High strength and Young's modulus of wet-coagulated bodies is key to the success of a direct coagulation casting (DCC) process. The yield strength and Young's modulus of wet-coagulated alumina bodies prepared at various concentrations of ammonium poly(acrylate) dispersant and MgO coagulating agent has been evaluated. The yield strength and Young's modulus of the wet-coagulated bodies, prepared at a MgO concentration equivalent to react with the dispersant, increased with an increase in the dispersant concentration due to the binding of alumina particles by the Mg-poly(acrylate) formed by the reaction between the dispersant and MgO. Addition of MgO higher than the equivalent amount to react with the dispersant increased the yield strength, Young's modulus, and brittleness of the wet-coagulated bodies. This is due to a combination of an increase in the cohesive force between particles and a decrease in homogeneity of the particle network in the wet-coagulated body induced by heterocoagulation of alumina and MgO particles having opposite surface charges. The high yield strength (up to 472 kPa) and Young's modulus (up to 110 MPa) achieved would facilitate easy and successful removal of the wet-coagulated bodies even from Intricate Shape molds.
