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Maňas David - One of the best experts on this subject based on the ideXlab platform.

  • Ultra nanoindenation test of injection polybutylene terephthalate (PBT) irradiated by low doses beta irradiation
    MM publishing Ltd., 2018
    Co-Authors: Mizera Martin, Maňas David, Maňas Miroslav, Gajzlerová Lenka
    Abstract:

    The influence of high doses of beta radiation on the changes in the structure and selected properties (mechanical and thermal) polymers were proved. Using high doses of beta radiation for polybutylene terephthalate (PBT) and its influence on the changes of mechanical properties of ultra nanohardness has not been studied in detail so far. The specimens of polybutylene terephthalate (PBT) were made by injection Moulding Technology and irradiated by high doses of beta radiation (0, 33, 66 and 99 kGy). The changes in the microstructure and micromechanical properties of surface layer were evaluated using FTIR, WAXS and instrumented ultra nanohardness test. The results of the measurements showed considerable increase in mechanical properties (indentation hardness, indentation elastic modulus) when the high doses of beta radiation are used. © 2017, MM publishing Ltd. All rights reserved.BGS, Biogeoscience Institute, University of Calgary; MSMT-7778/2014; LO1303; CZ.1.05/2.1.00/03.0089, ERDF, European Regional Development Fun

  • Mechanical properties of surface layer of unfilled polypropylene
    'EDP Sciences', 2018
    Co-Authors: Maňas David, Dobránsky Jozef, Chvatalova Lenka
    Abstract:

    Using high doses of beta radiation for unfilled polypropylene (PP) and its influence on the changes of micromechanical properties of surface layer has not been studied in detail so far. The testing sapmles polypropylene (PP) were made by injection Moulding Technology and irradiated by high doses of beta radiation (0, 15 and 33 kGy). The changes in the microstructure and micromechanical properties of surface layer were evaluated using WAXS and instrumented ultra nano-hardness test. The results of the measurements showed considerable increase in micromechanical properties (indentation hardness, indentation elastic modulus) when low doses of beta radiation are used. © The Authors, published by EDP Sciences, 2017

  • Effect of beta irradiation on mechanical properties of surface layer of injection moulded polyamide 11
    Huthig GmbH, 2018
    Co-Authors: Maňas David, Maňas Miroslav, Mizera Aleš, Stoklásek Pavel, Tomanová Katarína, Hýlová Lenka
    Abstract:

    The influence of beta radiation on changes in the structure and selected (mechanical and thermal) properties of polymers was proved. The use of low beta radiation doses for polyamide 11 (PA 11) and their influence on the changes of mechanical properties of surface layers has not yet been studied in detail so far. The specimens of PA 11 were made using injection Moulding Technology and these were irradiated by low doses of beta radiation (0, 132, 165 and 198 kGy). The changes in the microstructure and micromechanical properties of surface layer were evaluated using FTIR, WAXS and the instrumented microhardness test. The results of the measurements showed considerable changes in the mechanical properties. © 2018 Huthig GmbH. All rights reserved.internal grant of TBU in Zlin [IGA/FT/2017/010]; Ministry of Education, Youth and Sports of the Czech Republic within the National Sustainability Programme [LO1303 (MSMT-7778/2014)]; European Regional Development Fund under the project CEBIA-Tech [CZ.1.05/2.1.00/03.0089

  • Micro-hardness of surface layer of irradiated Polybutene Terephthalate (PBT)
    'EDP Sciences', 2017
    Co-Authors: Maňas David, Maňas Miroslav, Stoklásek Pavel, Staněk Michal, Ovsík Martin, Chvatalova Lenka, Hýlová Lenka
    Abstract:

    Using high doses of beta radiation for polybutylene terephthalate (PBT) and its influence on the changes of micromechanical properties of surface layer has not been studied in detail so far. The specimens of PBT were made by injection Moulding Technology and irradiated by high doses of beta radiation (0, 132, 165 and 198 kGy). The changes in the microstructure and micromechanical properties of surface layer were evaluated using WAXS and instrumented microhardness test. The results of the measurements showed considerable increase in micromechanical properties (indentation hardness, indentation elastic modulus) when high doses of beta radiation are used.Ministry of Education, Youth and Sports of the Czech Republic within the National Sustainability Programme [LO1303 (MSMT-7778/2014)]; European Regional Development Fund under the project CEBIA-Tech [CZ.1.05/2.1.00/03.0089]; internal grant of TBU in Zlin [IGA/FT/2016/010]; Ministry of Education, Youth and Sports of the Czech Republi

  • Effect of low Doses Beta Irradiation on Mechanical Properties of Surface Layer of Injection Moulded Polybutylene Terephthalate (PBT)
    Dr. Alfred Huthig Verlag Gmbh Hüthig GmbH, 2015
    Co-Authors: Maňas David, Maňas Miroslav, Gajzlerová Lenka, Mizera Aleš, Bednařík Martin, Staněk Michal, Ovsík Martin, Navrátil Jan, Maňas Martin
    Abstract:

    Using low doses of beta radiation for polybutylene terephthalate (PBT) and its influence on the changes of micromechanical properties of surface layer has not been studied in detail so far. The specimens of PBT were made by injection Moulding Technology and irradiated by low doses of beta radiation (0, 33, 66 and 99 kGy). The changes in the microstructure and micromechanical properties of surface layer were evaluated using FTIR, WAXS and instrumented microhardness test. The results of the measurements showed considerable decrease in micromechanical properties (indentation hardness, indentation elastic modulus) when low doses of beta radiation are used.TBU in Zlin from the resources of specific university research and Technology Agency of the Czech Republic [IGA/FT/2015/006, TA03010724 AV]; Ministry of Education of the Czech Republic [MSMT-7778/2014]; European Regional Development Fund under the Project CEBIA-Tech [CZ.1.05/2.1.00/03.0089

Hýlová Lenka - One of the best experts on this subject based on the ideXlab platform.

  • Effect of beta irradiation on mechanical properties of surface layer of injection moulded polyamide 11
    Huthig GmbH, 2018
    Co-Authors: Maňas David, Maňas Miroslav, Mizera Aleš, Stoklásek Pavel, Tomanová Katarína, Hýlová Lenka
    Abstract:

    The influence of beta radiation on changes in the structure and selected (mechanical and thermal) properties of polymers was proved. The use of low beta radiation doses for polyamide 11 (PA 11) and their influence on the changes of mechanical properties of surface layers has not yet been studied in detail so far. The specimens of PA 11 were made using injection Moulding Technology and these were irradiated by low doses of beta radiation (0, 132, 165 and 198 kGy). The changes in the microstructure and micromechanical properties of surface layer were evaluated using FTIR, WAXS and the instrumented microhardness test. The results of the measurements showed considerable changes in the mechanical properties. © 2018 Huthig GmbH. All rights reserved.internal grant of TBU in Zlin [IGA/FT/2017/010]; Ministry of Education, Youth and Sports of the Czech Republic within the National Sustainability Programme [LO1303 (MSMT-7778/2014)]; European Regional Development Fund under the project CEBIA-Tech [CZ.1.05/2.1.00/03.0089

  • Micro-hardness of surface layer of irradiated Polybutene Terephthalate (PBT)
    'EDP Sciences', 2017
    Co-Authors: Maňas David, Maňas Miroslav, Stoklásek Pavel, Staněk Michal, Ovsík Martin, Chvatalova Lenka, Hýlová Lenka
    Abstract:

    Using high doses of beta radiation for polybutylene terephthalate (PBT) and its influence on the changes of micromechanical properties of surface layer has not been studied in detail so far. The specimens of PBT were made by injection Moulding Technology and irradiated by high doses of beta radiation (0, 132, 165 and 198 kGy). The changes in the microstructure and micromechanical properties of surface layer were evaluated using WAXS and instrumented microhardness test. The results of the measurements showed considerable increase in micromechanical properties (indentation hardness, indentation elastic modulus) when high doses of beta radiation are used.Ministry of Education, Youth and Sports of the Czech Republic within the National Sustainability Programme [LO1303 (MSMT-7778/2014)]; European Regional Development Fund under the project CEBIA-Tech [CZ.1.05/2.1.00/03.0089]; internal grant of TBU in Zlin [IGA/FT/2016/010]; Ministry of Education, Youth and Sports of the Czech Republi

  • Micro-hardness of surface layer of irradiated Polybutene Terephthalate (PBT)
    EDP Sciences, 2016
    Co-Authors: Manas David, Stoklásek Pavel, Ovsík Martin, Manas Miroslav, Stanek Michal, Chvatalova Lenka, Hýlová Lenka
    Abstract:

    Using high doses of beta radiation for polybutylene terephthalate (PBT) and its influence on the changes of micromechanical properties of surface layer has not been studied in detail so far. The specimens of PBT were made by injection Moulding Technology and irradiated by high doses of beta radiation (0, 132, 165 and 198 kGy). The changes in the microstructure and micromechanical properties of surface layer were evaluated using WAXS and instrumented microhardness test. The results of the measurements showed considerable increase in micromechanical properties (indentation hardness, indentation elastic modulus) when high doses of beta radiation are used

Dolores Riera - One of the best experts on this subject based on the ideXlab platform.

  • Ultrasonic nodal point, a new configuration for ultrasonic Moulding Technology
    Ultrasonics, 2021
    Co-Authors: Marcel Janer, Xavier Planta, Toni López, Dolores Riera
    Abstract:

    Abstract Ultrasonic Moulding is a new Technology that uses high power ultrasounds to melt and mould thermoplastic polymers to produce samples with mini and micro features. The main feature of this Technology is the use of ultrasonic energy as the heating source instead of a conventional injection screw. Even if ultrasonic Moulding overcomes some of the drawbacks of conventional mini and micro-injection Moulding, it still presents two main limitations that are hindering its widespread applicability: the lack of stability of the process and the difficulty to obtain samples with good mechanical properties for some materials. This article presents a new configuration, called nodal point ultrasonic Moulding (NPUSM), to surmount such limitations. This configuration improves the stability of ultrasonic Moulding Technology and it is capable of processing materials with good mechanical properties. To prove its efficacy, the nodal point ultrasonic Moulding configuration is used to obtain the processing window of a polyoxymethylene material and these results are compared with standard ultrasonic injection and conventional injection Moulding. The results obtained show that NPSUM configuration improves the capabilities of ultrasonic Moulding technologies.

Truong Quoc Thanh - One of the best experts on this subject based on the ideXlab platform.

  • online self tuning fuzzy proportional integral derivative control for hydraulic load simulator
    Proceedings of the Institution of Mechanical Engineers. Part I: Journal of Systems and Control Engineering, 2008
    Co-Authors: Kyoung Kwan Ahn, Dinh Quang Truong, Truong Quoc Thanh, B R Lee
    Abstract:

    Hydraulic systems play an important role in modern industry owing to the fact that hydraulic actuator systems have many advantages over other technologies with electric motors, high durability, and the ability to produce large force at high speeds. Therefore, the hydraulic actuator has a wide range of application fields such as hydraulic pressing machines, Moulding Technology, etc. where controlled forces or pressures with high accuracy and fast response are the most significant demands. Consequently, many hybrid actuator models have been developed for research on how to control forces or pressures with the best results. The current paper presents a new kind of hydraulic load simulator for conducting performance and stability tests for control forces of hydraulic hybrid systems. In the dynamic loading process, disturbance makes the control performance (such as stability, frequency response, loading sensitivity, etc.) decrease or turn bad. In order to improve the control performance of a loading system and to eliminate or reduce the disturbance, an online self-tuning fuzzy proportional– integral–derivative (PID) controller is designed. Experiments are carried out to evaluate the effectiveness of the proposed control method applied for hydraulic systems with varied external disturbance as in real working conditions

  • online self tuning fuzzy proportional integral derivative control for hydraulic load simulator
    Proceedings of the Institution of Mechanical Engineers. Part I: Journal of Systems and Control Engineering, 2008
    Co-Authors: Dinh Quang Truong, Truong Quoc Thanh
    Abstract:

    Hydraulic systems play an important role in modern industry owing to the fact that hydraulic actuator systems have many advantages over other technologies with electric motors, high durability, and the ability to produce large force at high speeds. Therefore, the hydraulic actuator has a wide range of application fields such as hydraulic pressing machines, Moulding Technology, etc. where controlled forces or pressures with high accuracy and fast response are the most significant demands. Consequently, many hybrid actuator models have been developed for research on how to control forces or pressures with the best results. The current paper presents a new kind of hydraulic load simulator for conducting performance and stability tests for control forces of hydraulic hybrid systems. In the dynamic loading process, disturbance makes the control performance (such as stability, frequency response, loading sensitivity, etc.) decrease or turn bad. In order to improve the control performance of a loading system and...

Maňas Miroslav - One of the best experts on this subject based on the ideXlab platform.

  • Ultra nanoindenation test of injection polybutylene terephthalate (PBT) irradiated by low doses beta irradiation
    MM publishing Ltd., 2018
    Co-Authors: Mizera Martin, Maňas David, Maňas Miroslav, Gajzlerová Lenka
    Abstract:

    The influence of high doses of beta radiation on the changes in the structure and selected properties (mechanical and thermal) polymers were proved. Using high doses of beta radiation for polybutylene terephthalate (PBT) and its influence on the changes of mechanical properties of ultra nanohardness has not been studied in detail so far. The specimens of polybutylene terephthalate (PBT) were made by injection Moulding Technology and irradiated by high doses of beta radiation (0, 33, 66 and 99 kGy). The changes in the microstructure and micromechanical properties of surface layer were evaluated using FTIR, WAXS and instrumented ultra nanohardness test. The results of the measurements showed considerable increase in mechanical properties (indentation hardness, indentation elastic modulus) when the high doses of beta radiation are used. © 2017, MM publishing Ltd. All rights reserved.BGS, Biogeoscience Institute, University of Calgary; MSMT-7778/2014; LO1303; CZ.1.05/2.1.00/03.0089, ERDF, European Regional Development Fun

  • Effect of beta irradiation on mechanical properties of surface layer of injection moulded polyamide 11
    Huthig GmbH, 2018
    Co-Authors: Maňas David, Maňas Miroslav, Mizera Aleš, Stoklásek Pavel, Tomanová Katarína, Hýlová Lenka
    Abstract:

    The influence of beta radiation on changes in the structure and selected (mechanical and thermal) properties of polymers was proved. The use of low beta radiation doses for polyamide 11 (PA 11) and their influence on the changes of mechanical properties of surface layers has not yet been studied in detail so far. The specimens of PA 11 were made using injection Moulding Technology and these were irradiated by low doses of beta radiation (0, 132, 165 and 198 kGy). The changes in the microstructure and micromechanical properties of surface layer were evaluated using FTIR, WAXS and the instrumented microhardness test. The results of the measurements showed considerable changes in the mechanical properties. © 2018 Huthig GmbH. All rights reserved.internal grant of TBU in Zlin [IGA/FT/2017/010]; Ministry of Education, Youth and Sports of the Czech Republic within the National Sustainability Programme [LO1303 (MSMT-7778/2014)]; European Regional Development Fund under the project CEBIA-Tech [CZ.1.05/2.1.00/03.0089

  • Micro-hardness of surface layer of irradiated Polybutene Terephthalate (PBT)
    'EDP Sciences', 2017
    Co-Authors: Maňas David, Maňas Miroslav, Stoklásek Pavel, Staněk Michal, Ovsík Martin, Chvatalova Lenka, Hýlová Lenka
    Abstract:

    Using high doses of beta radiation for polybutylene terephthalate (PBT) and its influence on the changes of micromechanical properties of surface layer has not been studied in detail so far. The specimens of PBT were made by injection Moulding Technology and irradiated by high doses of beta radiation (0, 132, 165 and 198 kGy). The changes in the microstructure and micromechanical properties of surface layer were evaluated using WAXS and instrumented microhardness test. The results of the measurements showed considerable increase in micromechanical properties (indentation hardness, indentation elastic modulus) when high doses of beta radiation are used.Ministry of Education, Youth and Sports of the Czech Republic within the National Sustainability Programme [LO1303 (MSMT-7778/2014)]; European Regional Development Fund under the project CEBIA-Tech [CZ.1.05/2.1.00/03.0089]; internal grant of TBU in Zlin [IGA/FT/2016/010]; Ministry of Education, Youth and Sports of the Czech Republi

  • Effect of low Doses Beta Irradiation on Mechanical Properties of Surface Layer of Injection Moulded Polybutylene Terephthalate (PBT)
    Dr. Alfred Huthig Verlag Gmbh Hüthig GmbH, 2015
    Co-Authors: Maňas David, Maňas Miroslav, Gajzlerová Lenka, Mizera Aleš, Bednařík Martin, Staněk Michal, Ovsík Martin, Navrátil Jan, Maňas Martin
    Abstract:

    Using low doses of beta radiation for polybutylene terephthalate (PBT) and its influence on the changes of micromechanical properties of surface layer has not been studied in detail so far. The specimens of PBT were made by injection Moulding Technology and irradiated by low doses of beta radiation (0, 33, 66 and 99 kGy). The changes in the microstructure and micromechanical properties of surface layer were evaluated using FTIR, WAXS and instrumented microhardness test. The results of the measurements showed considerable decrease in micromechanical properties (indentation hardness, indentation elastic modulus) when low doses of beta radiation are used.TBU in Zlin from the resources of specific university research and Technology Agency of the Czech Republic [IGA/FT/2015/006, TA03010724 AV]; Ministry of Education of the Czech Republic [MSMT-7778/2014]; European Regional Development Fund under the Project CEBIA-Tech [CZ.1.05/2.1.00/03.0089