The Experts below are selected from a list of 15774 Experts worldwide ranked by ideXlab platform

Jerry H Qi - One of the best experts on this subject based on the ideXlab platform.

  • developing Intelligent Structures and devices using novel smart materials and multi material multi method m4 3d printing
    Structural Health Monitoring-an International Journal, 2019
    Co-Authors: Devin J Roach, Craig M. Hamel, Josh Kovitz, Janet Wong, Xiao Kuang, Jerry H Qi
    Abstract:

    The advent of additive manufacturing (AM), commonly known as 3D printing, has enabled the rapid fabrication of complex Structures previously unrealizable with traditional manufacturing techniques. Current approaches, however, are limited to single materials or single methodologies greatly limiting the potential scope of manufacturable products and components. Recently, our group has developed a novel multi-material multi-method (m4) 3D printer which integrates four AM technologies and two complementary technologies into one single platform. This allows for the fabrication of complex devices able to provide a wide range of functionalities ranging from stretchable electronics to self-sensing devices. To demonstrate these functionalities in the realm of printable electronics, multiple proof of concept printed circuit boards (PCBs) were fabricated which solve issues commonly encountered in 3D printed electronics such as high resolution or vertically integrated access (VIA) circuits. In addition, 3D printed smart Structures able to respond to external stimulus, such as light or heat, have become highly desirable for applications ranging from soft robotics to implantable medical devices. Recently, our group has turned to liquid crystal elastomers (LCE), a class of active material able to generate large, rapid, and reversible actuations. Therefore, using the m4 3D printer, LCE-based smart Structures requiring complex electronics were fabricated which can change their shape in response to an applied current. To demonstrate this, a smart, reconfigurable radio frequency (RF) antenna was 3D printed which can change its shape and operating frequency as a function of the applied current. These examples demonstrate the vast potential of m4 3D printing for creating smart, reconfigurable, and multi-functional Structures.

Jose Juliano De Lima - One of the best experts on this subject based on the ideXlab platform.

  • Modelagem de sensores e atuadores piezeletricos com aplicações em controle ativo de estruturas
    [s.n.], 2018
    Co-Authors: Jose Juliano De Lima
    Abstract:

    Orientador: Jose Roberto de França ArrudaTese (doutorado) - Universidade Estadual de Campinas, Faculdade de Engenharia MecanicaResumo: Apresenta-se uma metodologia para a modelagem analítica e numérica de estruturas, com elementos piezelétricos incorporados. Obtêm-se modelos analíticos de placa de Kirchhoff e Mindlin-Reissner e de viga de Euler-Bemoulli e Timoshenko, a partir das equações de movimento de casca, com a aplicação dos Postulados de Love e da escolha apropriada dos raios de curvaturas e dos Parâmetros de Lamé. Em seguida, são consideradas, nos modelos, as influências do elemento piezelétrico. O princípio variacional, aplicado em meios piezelétricos, é obtido com o auxílio da energia potencial mecânica da estrutura e elétrica do material piezelétrico. Com base nesse princípio, vários modelos numéricos são desenvolvidos, usando o método dos elementos finitos, tais como o modelo que usa o elemento sólido 3D, modelos de placa de Kirchhoff e Mindlin-Reissner e de viga de Euler-Bemoulli e Timoshenko. Desenvolve-se um programa computacional para a realização da análise estática e dinâmica de estruturas, com elementos piezelétricos incorporados. Simulações numéricas e experimentais são efetuadas e os resultados gerados são comparados entre si e com os dados disponíveis em algumas das referências bibliográficas citadasAbstract: An analytical and numerical approach for modelling Intelligent Structures with incorporated piezoelectric elements is presented. Analytical models of Kirchhoff and Mindlin-Reissner plates and of Euler-Bemoulli and Timoshenko beams are obtained from equations of motion of Structures having shell characteristics with the application of the Love Postulates and judicious choices of the curvature radii and Lamé Parameters. Then, the effects of the piezoelectric element are taken into account in the models. The variational principIe for piezoelectric media is obtained by considering both the potential mechanical energy of the Structures and the electrical energy of the piezoelectric material. Based in this principle, various numerical models are developed by applying the finite element method: such as the 3D solid element model, the Kirchhoff and Mindlin-Reissner plate models and the Euler-Bemoulli and Timoshenko beam models. A computer program is developed for the static and dynamical analyses of Structures with incorporated piezoelectric elements. A range of numerical simulations and experimental tests are carried out and the results are compared to each other and to available data found in the literatureDoutoradoMecanica dos Sólidos e Projeto MecanicoDoutor em Engenharia Mecânic

  • Modelagem de sensores e atuadores piezeletricos com aplicações em controle ativo de estruturas
    2017
    Co-Authors: Jose Juliano De Lima
    Abstract:

    Resumo: Apresenta-se uma metodologia para a modelagem analítica e numérica de estruturas, com elementos piezelétricos incorporados. Obtêm-se modelos analíticos de placa de Kirchhoff e Mindlin-Reissner e de viga de Euler-Bemoulli e Timoshenko, a partir das equações de movimento de casca, com a aplicação dos Postulados de Love e da escolha apropriada dos raios de curvaturas e dos Parâmetros de Lamé. Em seguida, são consideradas, nos modelos, as influências do elemento piezelétrico. O princípio variacional, aplicado em meios piezelétricos, é obtido com o auxílio da energia potencial mecânica da estrutura e elétrica do material piezelétrico. Com base nesse princípio, vários modelos numéricos são desenvolvidos, usando o método dos elementos finitos, tais como o modelo que usa o elemento sólido 3D, modelos de placa de Kirchhoff e Mindlin-Reissner e de viga de Euler-Bemoulli e Timoshenko. Desenvolve-se um programa computacional para a realização da análise estática e dinâmica de estruturas, com elementos piezelétricos incorporados. Simulações numéricas e experimentais são efetuadas e os resultados gerados são comparados entre si e com os dados disponíveis em algumas das referências bibliográficas citadasAbstract: An analytical and numerical approach for modelling Intelligent Structures with incorporated piezoelectric elements is presented. Analytical models of Kirchhoff and Mindlin-Reissner plates and of Euler-Bemoulli and Timoshenko beams are obtained from equations of motion of Structures having shell characteristics with the application of the Love Postulates and judicious choices of the curvature radii and Lamé Parameters. Then, the effects of the piezoelectric element are taken into account in the models. The variational principIe for piezoelectric media is obtained by considering both the potential mechanical energy of the Structures and the electrical energy of the piezoelectric material. Based in this principle, various numerical models are developed by applying the finiteelement method: such as the 3D solid element model, the Kirchhoff and Mindlin-Reissner plate models and the Euler-Bemoulli and Timoshenko beam models. A computer program is developed for the static and dynamical analyses of Structures with incorporated piezoelectric elements. A range of numerical simulations and experimental tests are carried out and the results are compared to each other and to available data found in the literatur

Devin J Roach - One of the best experts on this subject based on the ideXlab platform.

  • developing Intelligent Structures and devices using novel smart materials and multi material multi method m4 3d printing
    Structural Health Monitoring-an International Journal, 2019
    Co-Authors: Devin J Roach, Craig M. Hamel, Josh Kovitz, Janet Wong, Xiao Kuang, Jerry H Qi
    Abstract:

    The advent of additive manufacturing (AM), commonly known as 3D printing, has enabled the rapid fabrication of complex Structures previously unrealizable with traditional manufacturing techniques. Current approaches, however, are limited to single materials or single methodologies greatly limiting the potential scope of manufacturable products and components. Recently, our group has developed a novel multi-material multi-method (m4) 3D printer which integrates four AM technologies and two complementary technologies into one single platform. This allows for the fabrication of complex devices able to provide a wide range of functionalities ranging from stretchable electronics to self-sensing devices. To demonstrate these functionalities in the realm of printable electronics, multiple proof of concept printed circuit boards (PCBs) were fabricated which solve issues commonly encountered in 3D printed electronics such as high resolution or vertically integrated access (VIA) circuits. In addition, 3D printed smart Structures able to respond to external stimulus, such as light or heat, have become highly desirable for applications ranging from soft robotics to implantable medical devices. Recently, our group has turned to liquid crystal elastomers (LCE), a class of active material able to generate large, rapid, and reversible actuations. Therefore, using the m4 3D printer, LCE-based smart Structures requiring complex electronics were fabricated which can change their shape in response to an applied current. To demonstrate this, a smart, reconfigurable radio frequency (RF) antenna was 3D printed which can change its shape and operating frequency as a function of the applied current. These examples demonstrate the vast potential of m4 3D printing for creating smart, reconfigurable, and multi-functional Structures.

Craig M. Hamel - One of the best experts on this subject based on the ideXlab platform.

  • developing Intelligent Structures and devices using novel smart materials and multi material multi method m4 3d printing
    Structural Health Monitoring-an International Journal, 2019
    Co-Authors: Devin J Roach, Craig M. Hamel, Josh Kovitz, Janet Wong, Xiao Kuang, Jerry H Qi
    Abstract:

    The advent of additive manufacturing (AM), commonly known as 3D printing, has enabled the rapid fabrication of complex Structures previously unrealizable with traditional manufacturing techniques. Current approaches, however, are limited to single materials or single methodologies greatly limiting the potential scope of manufacturable products and components. Recently, our group has developed a novel multi-material multi-method (m4) 3D printer which integrates four AM technologies and two complementary technologies into one single platform. This allows for the fabrication of complex devices able to provide a wide range of functionalities ranging from stretchable electronics to self-sensing devices. To demonstrate these functionalities in the realm of printable electronics, multiple proof of concept printed circuit boards (PCBs) were fabricated which solve issues commonly encountered in 3D printed electronics such as high resolution or vertically integrated access (VIA) circuits. In addition, 3D printed smart Structures able to respond to external stimulus, such as light or heat, have become highly desirable for applications ranging from soft robotics to implantable medical devices. Recently, our group has turned to liquid crystal elastomers (LCE), a class of active material able to generate large, rapid, and reversible actuations. Therefore, using the m4 3D printer, LCE-based smart Structures requiring complex electronics were fabricated which can change their shape in response to an applied current. To demonstrate this, a smart, reconfigurable radio frequency (RF) antenna was 3D printed which can change its shape and operating frequency as a function of the applied current. These examples demonstrate the vast potential of m4 3D printing for creating smart, reconfigurable, and multi-functional Structures.

Josh Kovitz - One of the best experts on this subject based on the ideXlab platform.

  • developing Intelligent Structures and devices using novel smart materials and multi material multi method m4 3d printing
    Structural Health Monitoring-an International Journal, 2019
    Co-Authors: Devin J Roach, Craig M. Hamel, Josh Kovitz, Janet Wong, Xiao Kuang, Jerry H Qi
    Abstract:

    The advent of additive manufacturing (AM), commonly known as 3D printing, has enabled the rapid fabrication of complex Structures previously unrealizable with traditional manufacturing techniques. Current approaches, however, are limited to single materials or single methodologies greatly limiting the potential scope of manufacturable products and components. Recently, our group has developed a novel multi-material multi-method (m4) 3D printer which integrates four AM technologies and two complementary technologies into one single platform. This allows for the fabrication of complex devices able to provide a wide range of functionalities ranging from stretchable electronics to self-sensing devices. To demonstrate these functionalities in the realm of printable electronics, multiple proof of concept printed circuit boards (PCBs) were fabricated which solve issues commonly encountered in 3D printed electronics such as high resolution or vertically integrated access (VIA) circuits. In addition, 3D printed smart Structures able to respond to external stimulus, such as light or heat, have become highly desirable for applications ranging from soft robotics to implantable medical devices. Recently, our group has turned to liquid crystal elastomers (LCE), a class of active material able to generate large, rapid, and reversible actuations. Therefore, using the m4 3D printer, LCE-based smart Structures requiring complex electronics were fabricated which can change their shape in response to an applied current. To demonstrate this, a smart, reconfigurable radio frequency (RF) antenna was 3D printed which can change its shape and operating frequency as a function of the applied current. These examples demonstrate the vast potential of m4 3D printing for creating smart, reconfigurable, and multi-functional Structures.